CA2473450C - Multifunctional particulate material, fluid, and composition - Google Patents
Multifunctional particulate material, fluid, and composition Download PDFInfo
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- CA2473450C CA2473450C CA2473450A CA2473450A CA2473450C CA 2473450 C CA2473450 C CA 2473450C CA 2473450 A CA2473450 A CA 2473450A CA 2473450 A CA2473450 A CA 2473450A CA 2473450 C CA2473450 C CA 2473450C
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M171/00—Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredients which are physically well-defined but for which the chemical nature is either unspecified or only very vaguely indicated
- C10M171/001—Electrorheological fluids; smart fluids
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/0036—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties showing low dimensional magnetism, i.e. spin rearrangements due to a restriction of dimensions, e.g. showing giant magnetoresistivity
- H01F1/0045—Zero dimensional, e.g. nanoparticles, soft nanoparticles for medical/biological use
- H01F1/0054—Coated nanoparticles, e.g. nanoparticles coated with organic surfactant
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/44—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids
- H01F1/447—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids characterised by magnetoviscosity, e.g. magnetorheological, magnetothixotropic, magnetodilatant liquids
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/021—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/022—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms containing at least two hydroxy groups
- C10M2207/0225—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms containing at least two hydroxy groups used as base material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
- C10N2020/01—Physico-chemical properties
- C10N2020/055—Particles related characteristics
- C10N2020/06—Particles of special shape or size
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
- C10N2020/01—Physico-chemical properties
- C10N2020/055—Particles related characteristics
- C10N2020/061—Coated particles
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/08—Resistance to extreme temperature
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/60—Electro rheological properties
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/14—Electric or magnetic purposes
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/17—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on variable-absorption elements not provided for in groups G02F1/015 - G02F1/169
- G02F1/172—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on variable-absorption elements not provided for in groups G02F1/015 - G02F1/169 based on a suspension of orientable dipolar particles, e.g. suspended particles displays
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2203/00—Function characteristic
- G02F2203/52—Optical limiters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/20—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
- H01F1/36—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites in the form of particles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2991—Coated
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2991—Coated
- Y10T428/2993—Silicic or refractory material containing [e.g., tungsten oxide, glass, cement, etc.]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2991—Coated
- Y10T428/2993—Silicic or refractory material containing [e.g., tungsten oxide, glass, cement, etc.]
- Y10T428/2995—Silane, siloxane or silicone coating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2991—Coated
- Y10T428/2993—Silicic or refractory material containing [e.g., tungsten oxide, glass, cement, etc.]
- Y10T428/2996—Glass particles or spheres
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2991—Coated
- Y10T428/2998—Coated including synthetic resin or polymer
Abstract
A multifunctional particulate material, fluid, or composition includes a predetermined amount of core particles with a plurality of coatings. The core particles have an average particle size of about 1 nm to 500 ~m. The particulate material, fluid, or composition is capable of exhibiting one or more properties, such as magnetic, thermal, optical, electrical, biological, chemical, lubrication, and rheological.
Description
MULTIFUNCTIONAL PARTICULATE MATERIAL, FLUID, AND COMPOSITION
TIRUMALA S. SUDARSHAN, PH.D.
SANJAY KOTHA
RAMACHANDRAN RADHAKRISIHNAN, PH.D.
BACKGROUND OF THE INVENTION
The present invention is generally directed to a particulate material, and more particularly to a multifunctional particulate material, composition, and fluid capable of exhibiting one or more properties, such as magnetic, thermal, optical, electrical, biological, lubrication and rheological.
[0003] Dispersions of particles in fluids, termed as functional fluids, exhibit controllable property changes with an application of either one or a combination of electrical, thermal, optical or magnetic impulses. The prominent examples from the art, include thermal heat transfer fluids, magnetorheological (MR) fluids and electrorheological (ER) fluids. ER and MR
fluids are known to exhibit changes in rheological behavior in the presence of an electrical and magnetic field, respectively, making them useful in a wide spectrum of applications, such as brakes, clutches, dampers and many others. However, if these fluids could exhibit more than one functionality, their io performance and life would increase many-folds. For example, if MR fluids, in addition to rheological control, have a thermal tunablity, the life of the device, which is adversely affected by the dissipated heat, can be significantly increased. Such multifunctional fluids are not known to exist presently.
[0004] Various examples of prior art in this area include U.S.
Patents 3,047,507; 3,937,839; 4,064,409; 4,106,488; 4,107,288; 4,183,156;
4,219,945; 4,267,234; 4,268,413; 4,303,636; 4,323,056; 4,340,626;
4,342,157; 4,443,430; 4,452,773; 4,454,234; 4,472,890; 4,501,726;
4,545,368; 4,554,088; 4,574,782; 4,613,304; 4,628,037; 4,637,394;
4,662,359; 4,672,040; 4,695,392; 4,695,393; 4,721,618; 4,992,190;
4,999,188; 5,067,952; 5,108,359; 5,161,776; 5,180,583; 5,202,352;
5,207,675; 5,236,410; 5,354,488; 5,358,659; 5,374,246; 5,427,767;
5,466,609; 5,493,792; 5,507,744; 5,525,249; 5,565,215; 5,582,425;
5,595,735; 5,597,531; 5,624,685; 5,635,162; 5,635,215; 5,645,849;
TIRUMALA S. SUDARSHAN, PH.D.
SANJAY KOTHA
RAMACHANDRAN RADHAKRISIHNAN, PH.D.
BACKGROUND OF THE INVENTION
The present invention is generally directed to a particulate material, and more particularly to a multifunctional particulate material, composition, and fluid capable of exhibiting one or more properties, such as magnetic, thermal, optical, electrical, biological, lubrication and rheological.
[0003] Dispersions of particles in fluids, termed as functional fluids, exhibit controllable property changes with an application of either one or a combination of electrical, thermal, optical or magnetic impulses. The prominent examples from the art, include thermal heat transfer fluids, magnetorheological (MR) fluids and electrorheological (ER) fluids. ER and MR
fluids are known to exhibit changes in rheological behavior in the presence of an electrical and magnetic field, respectively, making them useful in a wide spectrum of applications, such as brakes, clutches, dampers and many others. However, if these fluids could exhibit more than one functionality, their io performance and life would increase many-folds. For example, if MR fluids, in addition to rheological control, have a thermal tunablity, the life of the device, which is adversely affected by the dissipated heat, can be significantly increased. Such multifunctional fluids are not known to exist presently.
[0004] Various examples of prior art in this area include U.S.
Patents 3,047,507; 3,937,839; 4,064,409; 4,106,488; 4,107,288; 4,183,156;
4,219,945; 4,267,234; 4,268,413; 4,303,636; 4,323,056; 4,340,626;
4,342,157; 4,443,430; 4,452,773; 4,454,234; 4,472,890; 4,501,726;
4,545,368; 4,554,088; 4,574,782; 4,613,304; 4,628,037; 4,637,394;
4,662,359; 4,672,040; 4,695,392; 4,695,393; 4,721,618; 4,992,190;
4,999,188; 5,067,952; 5,108,359; 5,161,776; 5,180,583; 5,202,352;
5,207,675; 5,236,410; 5,354,488; 5,358,659; 5,374,246; 5,427,767;
5,466,609; 5,493,792; 5,507,744; 5,525,249; 5,565,215; 5,582,425;
5,595,735; 5,597,531; 5,624,685; 5,635,162; 5,635,215; 5,645,849;
2 5,646,185; 5,667,715; 5,670,078; 5,695,480; 5,702,630; 5,707,078;
5,714,829; 5,782,954; 5,800,372; 5,900,184; 5,927,753; 5,947,514;
6,027,664; 6,036,226; 6,036,955; 6,039,347; 6,044,866; 6,051,607;
6,076,852; 6,096,021; 6,149,576; 6,149,832; 6,167,313; 6,186,176 B1;
6,189,538 B1; 6,266,897 B1; 6,274,121 B1; 6,299,619 B1; 6,315,709 B1;
6,335,384 B1; 6,355,275 B1; 6,399,317 B1 6,409,851 B1; US 2001/0016210 Al; US 2001/0033384 and US 2002/0045045 Al; and.
OBJECTS AND SUMMARY OF THE INVENTION
[0005] The principal object of the present invention is to provide a particulate material that is capable of exhibiting multifunctional properties.
[0006] An object of the present invention is to provide a particulate composition that is capable of exhibiting multifunctional properties.
[0007] Another object of the present invention is to provide a fluid that is capable of exhibiting multifunctional properties. In particular, a fluid in accordance with the present invention is capable of exhibiting one or more properties, such as magnetic, thermal, optical, electrical, biological, chemical, lubrication, rheological, etc.
[0008] An additional object of the present invention is to provide a fluid that is sensitive to one or more stimuli or fields, such as magnetic, thermal, optical, electrical, etc.
5,714,829; 5,782,954; 5,800,372; 5,900,184; 5,927,753; 5,947,514;
6,027,664; 6,036,226; 6,036,955; 6,039,347; 6,044,866; 6,051,607;
6,076,852; 6,096,021; 6,149,576; 6,149,832; 6,167,313; 6,186,176 B1;
6,189,538 B1; 6,266,897 B1; 6,274,121 B1; 6,299,619 B1; 6,315,709 B1;
6,335,384 B1; 6,355,275 B1; 6,399,317 B1 6,409,851 B1; US 2001/0016210 Al; US 2001/0033384 and US 2002/0045045 Al; and.
OBJECTS AND SUMMARY OF THE INVENTION
[0005] The principal object of the present invention is to provide a particulate material that is capable of exhibiting multifunctional properties.
[0006] An object of the present invention is to provide a particulate composition that is capable of exhibiting multifunctional properties.
[0007] Another object of the present invention is to provide a fluid that is capable of exhibiting multifunctional properties. In particular, a fluid in accordance with the present invention is capable of exhibiting one or more properties, such as magnetic, thermal, optical, electrical, biological, chemical, lubrication, rheological, etc.
[0008] An additional object of the present invention is to provide a fluid that is sensitive to one or more stimuli or fields, such as magnetic, thermal, optical, electrical, etc.
3 [0009] Yet an additional object of the present invention is to provide a particulate material, a composition, a fluid, and/or an article including one or more of the same, which is capable of exhibiting substantially s simultaneous variations in one or more of its properties when subjected to one or more stimuli, such as magnetic, thermal, optical, electrical, etc.
[0010] Still yet an additional object of the present invention is to provide a particulate material, a composition, a fluid, and/or an article io including one or more of the same, wherein multifunctional properties are preferably derived from the core particles, one or more coatings, and the carrier medium.
[0011] In summary, the main object of the present invention is to 15 provide a fluid which includes single or multilayered coated particles of one or more compositions in a suitable carrier medium. The particles, coatings and the carrier medium, preferably include non-interacting compositions. The fluid exhibits a novel multifunctional behavior. A fluid possesses multifunctionality when it exhibits two or more properties. A wide variety of processes are 20 adopted to (1) synthesize the particles in various sizes (about 1 nm to 500 m), shapes (spherical, needle-like, etc.), and composition (iron and its oxides, cobalt, nickel, etc.), (2) apply a coating of a variable thickness (about 1 nm to 10 m) and/or in multilayers (1 to 10 or more layers), and (3) dispersing the coated particles in a medium (aqueous, oils, and the like). The 25 main properties attained by the present invention include magnetic, optical,
[0010] Still yet an additional object of the present invention is to provide a particulate material, a composition, a fluid, and/or an article io including one or more of the same, wherein multifunctional properties are preferably derived from the core particles, one or more coatings, and the carrier medium.
[0011] In summary, the main object of the present invention is to 15 provide a fluid which includes single or multilayered coated particles of one or more compositions in a suitable carrier medium. The particles, coatings and the carrier medium, preferably include non-interacting compositions. The fluid exhibits a novel multifunctional behavior. A fluid possesses multifunctionality when it exhibits two or more properties. A wide variety of processes are 20 adopted to (1) synthesize the particles in various sizes (about 1 nm to 500 m), shapes (spherical, needle-like, etc.), and composition (iron and its oxides, cobalt, nickel, etc.), (2) apply a coating of a variable thickness (about 1 nm to 10 m) and/or in multilayers (1 to 10 or more layers), and (3) dispersing the coated particles in a medium (aqueous, oils, and the like). The 25 main properties attained by the present invention include magnetic, optical,
4 thermal, electrical, rheological, lubrication, and biological, in various combinations. The properties of the fluid can be easily tuned by either altering the material properties, or the proportion of applied stimuli. Table 1 (below) lists various tunable parameters for the fluid of the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The above and other objects, novel features and advantages of the present invention will become apparent from the following 1o detailed description of the invention, as illustrated in the drawings, in which:
[0013] Figure 1 is a schematic illustration of various shapes for the core particles in accordance with the present invention;
[0014] Figure 2 is an enlarged cross-sectional view of an embodiment of a multifunctional particle in accordance with the present invention;
[0015] Figure 3 is an enlarged cross-sectional view of a multifunctional particle with two layers of generally the same thickness;
[0016] Figure 4 is a view similar to Figure 3, showing a multifunctional particle with two layers of different thicknesses;
[0017] Figure 5 is a schematic view showing a multifunctional fluid;
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The above and other objects, novel features and advantages of the present invention will become apparent from the following 1o detailed description of the invention, as illustrated in the drawings, in which:
[0013] Figure 1 is a schematic illustration of various shapes for the core particles in accordance with the present invention;
[0014] Figure 2 is an enlarged cross-sectional view of an embodiment of a multifunctional particle in accordance with the present invention;
[0015] Figure 3 is an enlarged cross-sectional view of a multifunctional particle with two layers of generally the same thickness;
[0016] Figure 4 is a view similar to Figure 3, showing a multifunctional particle with two layers of different thicknesses;
[0017] Figure 5 is a schematic view showing a multifunctional fluid;
5 [0018] Figure 6 is a schematic illustration of magneto-responsive functional particles showing a change in viscosity upon application of a magnetic field;
[0019] Figure 7 is a schematic illustration of a magneto-optic functional fluid showing a change in turbidity upon application of a magnetic field;
[0020] Figure 8 is a schematic illustration of magneto-responsive functional particles showing an increase in electrical pathway;
[0021] Figure 9 is a schematic illustration of a magneto-responsive functional fluid showing controlling or arresting internal hemorrhage;
[0022] Figure 10 is a schematic illustration of a magneto-responsive functional fluid showing inhibiting angiogenesis;
[0023] Figure 11 is a schematic illustration of an optical fluid showing a change in transparency upon application of light intensity;
[0024] Figure 12 is a schematic illustration of an electro-optical functional fluid showing a change in transparency with increasing electric field;
[0025] Figure 13 is a schematic illustration of a thermo-optical functional fluid showing a change in color due to a change in temperature;
[0019] Figure 7 is a schematic illustration of a magneto-optic functional fluid showing a change in turbidity upon application of a magnetic field;
[0020] Figure 8 is a schematic illustration of magneto-responsive functional particles showing an increase in electrical pathway;
[0021] Figure 9 is a schematic illustration of a magneto-responsive functional fluid showing controlling or arresting internal hemorrhage;
[0022] Figure 10 is a schematic illustration of a magneto-responsive functional fluid showing inhibiting angiogenesis;
[0023] Figure 11 is a schematic illustration of an optical fluid showing a change in transparency upon application of light intensity;
[0024] Figure 12 is a schematic illustration of an electro-optical functional fluid showing a change in transparency with increasing electric field;
[0025] Figure 13 is a schematic illustration of a thermo-optical functional fluid showing a change in color due to a change in temperature;
6 [0026] Figure 14 is a schematic illustration of an optical fluid showing a change in color with the application of a chemical or biological stimulus;
[0027] Figure 15 is a schematic illustration of an electro-responsive functional fluid showing a change in viscosity upon application of an electric field; and [0028] Figure 16 is a schematic illustration of a functional fluid wherein a pre-ceramic polymer coating on a core particle becomes ceramic when heat is applied.
DETAILED DESCRIPTION OF THE INVENTION
[0029] A multifunctional fluid, in accordance with the present invention, is capable of exhibiting substantially simultaneous variations in one or more of its properties, when subjected to one or more specific stimuli. The multifunctional fluid includes one or more core particles with one or more coatings, dispersed in a suitable carrier medium. While the overall properties of the fluid are generally dictated by all three components, the core particles contribute the main desirable property, while the coatings and the carrier medium adds various other variable functionalities.
[0027] Figure 15 is a schematic illustration of an electro-responsive functional fluid showing a change in viscosity upon application of an electric field; and [0028] Figure 16 is a schematic illustration of a functional fluid wherein a pre-ceramic polymer coating on a core particle becomes ceramic when heat is applied.
DETAILED DESCRIPTION OF THE INVENTION
[0029] A multifunctional fluid, in accordance with the present invention, is capable of exhibiting substantially simultaneous variations in one or more of its properties, when subjected to one or more specific stimuli. The multifunctional fluid includes one or more core particles with one or more coatings, dispersed in a suitable carrier medium. While the overall properties of the fluid are generally dictated by all three components, the core particles contribute the main desirable property, while the coatings and the carrier medium adds various other variable functionalities.
7 The core particles that are the subject of the present invention can be synthesized by various methods, such as chemical synthesis, sol-gel, chemical co-precipitation and rapid solidification. The microwave plasma technique, described in U.S. Patent Mo. 6,409,851, issued June 25, 2002 is the preferred technique as it can make a wide spectrum of particles with high purity. The properties of the particle, including electrical, thermal, magnetic or optical, vary significantly with the size of the particle. Tailoring the size of the particle can be used as a tool to effect required changes in the system.
The functional fluid of the present invention, includes core particles, preferably having an average particle size of about 1 nm to 500 pm. Other parameters, as listed below in Table 1, influence the desired functionality of the final fluid, and can be controlled by optimizing the synthesis process. For example, as the shape of the particle changes, so does the active surface area and the filled-up volume.
The functional fluid of the present invention, includes core particles, preferably having an average particle size of about 1 nm to 500 pm. Other parameters, as listed below in Table 1, influence the desired functionality of the final fluid, and can be controlled by optimizing the synthesis process. For example, as the shape of the particle changes, so does the active surface area and the filled-up volume.
-8-Table 1: List of Tunable Material Properties Material Properties External Stimuli Particle Size 1 nm - 500 pm Magnetic Field 0 - 1000T
Particle Shape spherical, needle Electric Field 0-10 KV/mm shaped, irregular, oblong, Laser Impulse cubical, cylindrical Thermal 0 - 2,000 C
Fields Particle Polychromatic Concentration 0 -100% Light Particle Shear Field 0 - 80,000 KPa Composition Particle size Mechanical 0 - 500 GPa Distribution Force Coating 1 nm -10 pm Thickness (preferred) Number of 1-10 (preferred) Coated Layers Coating Material polymers, Composition ceramics, metals, intermetallics, alloy
Particle Shape spherical, needle Electric Field 0-10 KV/mm shaped, irregular, oblong, Laser Impulse cubical, cylindrical Thermal 0 - 2,000 C
Fields Particle Polychromatic Concentration 0 -100% Light Particle Shear Field 0 - 80,000 KPa Composition Particle size Mechanical 0 - 500 GPa Distribution Force Coating 1 nm -10 pm Thickness (preferred) Number of 1-10 (preferred) Coated Layers Coating Material polymers, Composition ceramics, metals, intermetallics, alloy
9 [0032] The particles can be made of metal, polymer, ceramic material, intermetallic material, alloy, or a combination thereof. Preferable examples of the metal include iron, cobalt, nickel, copper, gold, silver, chromium, tungsten, silicon, aluminum, zinc, magnesium, titanium, molybdenum, tin, vanadium, germanium, zirconium, niobium, rhenium, iridium, cadmium, indium, hafnium, tantalum, platinum, neodymium, gallium, zinc, and a combination thereof. Preferable examples of the polymer include polystyrene, polymethyl methacrylate, polyvinyl alcohol, polyphenylene vinylene, and a combination thereof. Preferable examples of the ceramic io material include iron oxide, zinc ferrite, manganese ferrite, zinc oxide, aluminum oxide, silicon dioxide, silicon carbide, boron carbide, carbon and its types, indium oxide, titania, aluminum nitride, zirconia, tin oxide, chromium oxide, yttrium oxide, niobium oxide, hafnium oxide, tantalum oxide, tungsten oxide, magnesium oxide, boron nitride, silicon nitride, hafnium nitride, tantalum nitride, tungsten nitride, iron nitride, vanadium nitride, titanium, silicon carbide, chromium carbide, vanadium carbide, titanium carbide, iron carbide, zirconium carbide, niobium carbide, hafnium carbide, tungsten carbide, tantalum carbide, titanium diboride, vanadium boride, iron boride, zirconium diboride, hafnium diboride, tantalum diboride, nickel boride, cobalt boride, chromium boride, and a combination thereof. Preferable examples of the intermetallic material include titanium aluminide, niobium aluminide, iron aluminide, nickel aluminide, ruthenium aluminide, iridium aluminide, chromium aluminide, titanium silicide, niobium silicide, zirconium silicide, molybdenum silicide, hafnium silicide, tantalum silicide, tungsten silicide, iron silicide, cobalt silicide, nickel silicide, magnesium silicide, yttrium silicide, cadmium silicide, berryllium oxide, nickel berryllide, niobium berryllide, tantalum berryllide, yttrium berryllide, tantalum berryllide, zirconium berryllide, and a combination thereof. Preferable examples of the alloy include indium tin oxide, cadmium selenide, iron-cobalt, ferro-nickel, ferro-silicon, ferro-manganese, ferro-magnesium, brass, bronze, steel, a combination of two or more of the aforementioned metals, and a combination thereof.
[0033] Preferable examples of the shape of the particles, utilized in the present invention, include spherical, needle-shaped, cubic, oval, irregular, cylindrical, diamond-shaped, lamellar, polyhedral, and a combination thereof (Figure 1).
[0034] The present invention involves uniformly coating particles (noted above) with adherent layers of one or more materials, either in the gas or the liquid phase using techniques, such as sol-gel, chemical precipitation, chemical vapor deposition, plasma vapor deposition, gas phase condensation, evaporation and sublimation. During the gas phase process, the precursors or starting materials for synthesizing particles, as well as the coating material (in liquid or molten form) are subjected to high thermal energy. The uniformity and extent of coating(s) are controlled by varying operating parameters, such as temperature, feeding rate and proportions (of the starting materials or precursors), and the pressure of the process. The number of coated layers will depend simply on the feed composition and their concentration. One of the important advantages of the gas phase coating process is that it does not allow any gases or static charges to get adsorbed on the particle surface, thereby maintaining phase purity.
[0035] The liquid phase process is typically a chemical synthesis route in which the coating is established by reduction of the precursor (or starting material) while the favorable reaction site is the surface of the particles. In contrast to the gas phase reaction, this technique proves useful 1o only in materials, which readily undergo reduction in a solution phase.
Inert species, such as gold or silver, and gel forming polymers, such as polyethylene glycol and dextran, are a few examples. One of the primary advantages of this technique is that coating is established in stages, which gives precise control over the coating thickness and uniformity of layers in a is multilayered system.
[0036] In the case of polymer coating, the solution route may be similar to a core-shell polymerization while the gas phase would relate to a thermally assisted free radical polymerization reaction. The type of polymer 20 (hydrophilic, i.e., water-loving, or hydrophobic, i.e., insoluble in water) would decide the nature of carrier fluid, such as water, oil, or the like, in which these coated particles can be effectively dispersed.
[0037] Preferably, one to ten coatings are provided, and each 25 has a thickness range of about 1 nm to 500 pm, and preferably 1 nm to 10 pm. The coatings can have generally the same or varying thicknesses. It is noted that it is within the scope of the present invention to provide more than ten coatings of a different range of thickness.
[0038] The coating can be made of metal, polymer, ceramic material, intermetallic material, alloy, or a combination thereof. Preferable examples of the metal include iron, cobalt, nickel, copper, gold, silver, chromium, tungsten, silicon, aluminum, zinc, magnesium, titanium, molybdenum, tin, indium, bismuth, vanadium, magnesium, germanium, 1o zirconium, niobium, rhenium, iridium, cadmium, indium, hafnium, tantalum, platinum, neodymium, gallium, zinc, and a combination thereof. Preferable examples of the polymer include polyethylene glycol, sorbitol, manitol, starch, dextran, polymethyl methacrylate, polyaniline, polystyrene, poly pyrolle, N-isopropyl acrylamide, acrylamide, lecithin, and a combination thereof.
1s Preferable examples of the ceramic material include iron oxide, zinc ferrite, manganese ferrite, zinc oxide, aluminum oxide, silicon dioxide, silicon carbide, boron carbide, carbon and its types, indium oxide, titania, aluminum nitride, zirconia, tin oxide, chromium oxide, yttrium oxide, niobium oxide, hafnium oxide, tantalum oxide, tungsten oxide, magnesium oxide, boron nitride, silicon 20 nitride, hafnium nitride, tantalum nitride, tungsten nitride, iron nitride, vanadium nitride, titanium, silicon carbide, chromium carbide, vanadium carbide, titanium carbide, iron carbide, zirconium carbide, niobium carbide, hafnium carbide, tungsten carbide, tantalum carbide, titanium diboride, vanadium boride, iron boride, zirconium diboride, hafnium diboride, tantalum diboride, nickel boride, cobalt boride, chromium boride, and a combination thereof. Preferable examples of the intermetallic material include titanium aluminide, niobium aluminide, iron aluminide, nickel aluminide, ruthenium aluminide, iridium aluminide, chromium aluminide, titanium silicide, niobium silicide, zirconium silicide, molybdenum silicide, hafnium silicide, tantalum silicide, tungsten silicide, iron silicide, cobalt silicide, nickel silicide, magnesium silicide, yttrium silicide, cadmium silicide, berryllium oxide, nickel berryllide, niobium berryllide, tantalum berryllide, yttrium berryllide, tantalum berryllide, zirconium berryllide, and a combination thereof. Preferable to examples of the alloy include indium tin oxide, cadmium selenide, iron-cobalt, ferro-nickel, ferro-silicon, ferro-manganese, ferro-magnesium, brass, bronze, steel, a combination of two or more of the aforementioned metals, and a combination thereof.
[0039] The final property of the fluid will preferably depend upon the nature and type of carrier medium. In one embodiment, water alone can be used. However, water miscible organic solvents, such as ethanol, glycerol, ethylene glycol, propanol, dimethyl formamide, and the like can be used.
Water-based carrier fluids may also be used in various biological applications, such as imaging or drug targeting. In another embodiment, wherein the application requires higher viscosity, oil may be used. The coated particle, when dispersed in a high viscosity fluid, would reduce their natural Brownian motion, thereby rendering a higher level of stability to the system.
[0040] A non-limiting example of the carrier fluid that may be used in the present invention, includes water, mineral oil, hydraulic oil, silicone oil, vegetable oil (corn oil, peanut oil and the like), ethanol, glycerol, ethylene glycol, propanol, dimethyl formamide, paraffin wax, and a combination thereof.
[0041] The particles and their respective coatings essentially define the properties for the entire fluid. However, properties, such as optical, thermal or magnetic, are all dependent upon the force distribution between 1o the particles, which is closely related to the interparticle distance. In general, microscopic properties are strongly affected by the force fields and the interfacial contact area. In order to get superior functionality, it is preferred that the particles do not agglomerate. The present invention therefore utilizes a dispersant (or surfactant) stabilized system, wherein the agent assists the particles in remaining dispersed and reduces their tendency to get settled.
Preferable examples of surfactants include: dextran, starch, lecithin, glycol, glycerol, sorbitol, manitol, oleic acid, polyethylene glycol, and a combination thereof.
[0042] Figures 2-4 illustrate an embodiment of a multifunctional particle MFP made in accordance with the present invention. As shown in Figure 2, a core particle 10, made of a magnetic material (iron), is provided with three layers 12, 14 and 16 of optically-sensitive (gold), heat-absorbing (copper), and electrically-conductive (silica) materials, respectively. Figure illustrates a multifunctional particle MFP, which includes a core particle 18 provided with two layers 20 and 22 of the same thickness, and Figure 4 illustrates a multifunctional particle MFP, which includes a core particle 24 provided with two layers 26 and 28 of different thicknesses.
[0043] Figure 5 illustrates a fluid wherein multifunctional particles MFP, each including a core particle 30 with two layers 32 and 34, are dispersed in a suitable carrier medium 36 to form a multifunctional fluid or composition.
[0044] The present invention provides fluids which can exhibit multifunctional characteristics. These include optical, magnetic, thermal, electrical, rheological and biological properties that can be controlled (or altered) by one or more external stimuli. The core particle represents the main properties, while the coatings and the carrier medium contribute to other accompanying functionalities. The fluid according to the present invention, preferably contains all the components, which are non-interactive and the properties do not interact with each other.
[0044.1] In order to achieve the highest performance efficiency, it is desirable that both the core and one or more coatings remain intact. In particular, since the selected and/or the desired properties are derived from the core and coating(s), it is preferred that the core and coating(s) remain stable and intact from the time of manufacture to storage and through use. If the coating(s) was to separate from the core, dissolve or otherwise disintegrate, the utility of the coated particulate material would be compromised or lost. Thus, the core and coating(s) are designed or manufactured so as not to dissociate, dissolve or disintegrate due, for example, to temperature variations, interaction with moisture, soil, water, bodily fluids, etc. The coating(s) is, therefore, permanent or non-sacrificial in nature. In this regard, it is preferred that the core and coating(s) remain stable for a period of at least one year, from manufacture.
[0044.2] Preferably, one of the coatings is made of or includes a surfactant material, and alone, or with the core, provides the particulate material and/or the composition with at least one property selected from the group including magnetic, thermal, optical, electrical, biological, chemical, lubrication, rheological, and a combination thereof.
[0045] The following embodiments illustrate non-limiting examples of various types of fluids prepared in accordance of the present invention.
16a Magneto-Responsive Functional Fluids 10046] Magnetic particles, preferably of Fe, Co, Ni, Fe203 or ferrites (about 2% to 90 vol% concentrations, i.e., about 2 to 90 vol% of the fluid is comprised of the magnetic particles, dispersed in various media, such s as water, mineral oil, glycerol, elastomers, polymeric liquids, organic solvents and the like, exhibit a change in viscosity upon interaction with a magnetic field (Figure 6). The change in rheology can be controlled by intrinsically altering the magnetic properties of the particles or by variation in the magnitude of the external magnetic field. The magnetic properties, such as io magnetic saturation and coercivity, of the particles are dependent upon the shape and size of the particle, which can be precisely controlled and varied in the present invention (see Tables 2 and 3 below). In some applications that demand variable rheological behavior or gradient, the use of a mixture of particles, such as a mixture of iron and cobalt, mixture of iron and samarium-15 cobalt alloy, with different magnetic moments is preferred over a single component fluid.
[0047] One example is coating of magnetic particles with thermally conducting metal, such as copper, aluminum, silica, aluminum 20 oxide, and tungsten. This can be introduced via a conventionally known reverse miceller procedure, wherein the coating is established in a solution phase. The thermal coating would absorb any heat, which may have been generated due to the motion of particles in the medium. These fluids are useful in all mechanical applications of magnetic fluid technology, such as dampers, clutches and shock absorbers.
Table 2: Change in Coercivity with Particle Size Material Particle Size Coercivity (Oe) Iron 25 nm 460 100 nm 360 Cobalt 45 nm 157 150 nm 128 Iron Oxide 40 nm 176 150 nm 200 Table 3: Change in Magnetic Saturation with Particle Size Material Particle Size Magnetic Saturation (emu/gm) Iron 25 nm 170 100 nm 140 Cobalt 45 nm 60 150 nm 135 Iron Oxide 40 nm 40 150 nm 125 [0048] In another embodiment, magnetic particles are dispersed in an optically clear matrix, such a polymethyl methacrylate (PMMA), polycarbonate, indium oxide, or the like polymer. Optically clear materials in general are transparent to white light and have very low coefficient of absorption. The turbidity (or transparency) would be a function of the loading level of the particles. However, at constant solid's content, the application of magnetic field would align the particles, thereby forming a layered structure (Figure 7). When the distance between the layers is about one-half the order of magnitude of visible light, 400-800 nm, classical Bragg diffraction will result io in forbidden bands at typical frequencies. These forbidden states will disappear as soon as the magnetic field is removed and allow light of all wavelengths to pass, thus forming an on-off magnetically controlled optical switch. The size of the particles and their concentration (vol% in the fluid) will determine the maximum dip in intensity, while the distance between the is chains of magnetic particles will determine the frequency of the photonic bandgap. Thus, color agile switches can be made. An example is a 500 nm colloidal silica suspension at about 70 % concentration in a titanium oxide matrix.
20 [0049] In yet another embodiment, coated polymer magnetic particles exhibited sharp magnetic switching effects. This is believed to be due to the dipolar contribution of the polymer that directly influences the inter-particle interactions. Magnetic bistability and switching at low fields obtained in polymer-coated particles would be desirable in systems where the impedance in response to electrical or magnetic stimuli needs to be monitored with high precision. These compositions would therefore be of interest in, for example, RF switching and EMI shielding applications.
[0050] The above-noted fluids can be slightly modified to obtain magnetically controlled conductive composites, wherein magnetic particles, such as ferrites, are doped in conductive polymers, such as polyaniline, or polyphenylene vinylenes (PPV). As the particles are aligned in chains, an increase in electrical pathway is seen (Figure 8). Hence, a magnetically 1o tunable composite fluid can be produced in accordance with the present invention.
[0051] Using the magnetic fluid technology, a biological fluid is produced. This fluid includes biocompatible magnetic particles. The biocompatibility is due of the coating of polymers, such as dextran, starch, polyethylene glycol, sorbitol, or the like. The fluid can be injected inside the body to arrest internal hemorrhage or seal off blood vessels in order to inhibit angiogenesis. The sealing action is a result of a reversible viscosity increase in the presence of an externally positioned magnet.
[0052] As shown in Figure 9, magnetic particles 38, coated with a biocompatible surfactant and/or surface attached with desirable reagent/medicine/drug, are dispersed in a blood vessel 40. The particles 38 are aligned to form a blockage 42 upon application of a magnetic field by magnets 44, thereby arresting hemorrhage 46.
[0053] Figure 10 illustrates the use of magnetic particles 38 in inhibiting angiogenesis. As shown, particles 38 are carried through the blood vessel 48 that feeds the target organ 50. The application of a magnetic field by magnets 52 causes agglomeration 54 of the particles carrying the desired drug.
Optical Fluids [0054] A fluid which exhibits optical multifunctionality is 1o disclosed. This fluid is capable of transmitting visible light at a broad range of temperature range. The optical properties of fluids seem to drastically change as a function of increasing temperature, typically increasing their attenuation.
In accordance with the present invention, optically clear ceramic particles, such as ZnO or InO, are coated with a thin layer of copper having a thickness of about 10 nm to 100 nm. The coating thickness is limited by the optical clarity of the fluid. When the fluid is subjected to a temperature increase, all or part of the heat is absorbed by the surrounding copper layer, thereby averting any turbidity that may have been caused due to the input of heat.
[0055] In another embodiment, semiconductor nanocrystals, such as gallium arsenide, silicon carbide, silicon, germanium, cadmium selenide, and a combination thereof, are dispersed in an index matching liquid, such as water, oil, mixture of water and oil, polyethylene glycol, polymethylmethacrylate, polyacrylamide, polystyrene, and a combination thereof. The fluid is subjected to a laser impulse of fixed wavelength. As the intensity of the input laser is increased, the refractive index mismatch increases, thereby lowering the transparency of the medium (Figure 11).
Hence, the transparency of the medium is a function of the intensity of the incident light source. Changing the size and loading levels of the nanocrystals can be used to tune the optical limiting frequency.
[0056] In yet another embodiment, Cu-coated ceramic particles are dispersed in a conducting matrix. The transparency of this fluid changes io from clear (about 100% transmittance) to opaque (0% transmittance), as a function of the varying electric field (OA to 1000A) (Figure 12). These fluids would be desirable in applications such as optical limiters.
[0057] The present invention further discloses luminescent particles of gold and silver, which have a characteristic size on the order of the wavelength of visible light. These particles are embedded in a thermally switchable polymer matrix, such as N-isoproplylacrylamide, polyvinyl alcohol, polyethylene glycol, polyalkelene glycol, and a combination thereof. These polymeric gels possess a lower critical solution temperature of about room temperature. Above and below this temperature, there are significant differences between the excluded free volumes, which change the configuration of the encapsulated particles resulting in change in color (Figure 13). This property could be used in the fabrication of, for example, a temperature sensor.
[0058] The embodiment of Figure 13, could be slightly modified to fabricate an optical sensing fluid. Colloidal particles of gold or silver, coated with molecular recognition species, are dispersed in an aqueous or clear organic carrier medium. The interaction of molecules with a chemical or biological stimuli would alter the local configuration of the particles, thereby changing their reflecting color (Figure 14).
Electro-responsive Functional Fluids [0059] An electrically tunable fluid is disclosed. This includes silica particles coated with Cu (about 10 nm to 10 pm thickness) in a dielectric solvent, such as water, mineral oil, polypyrole, polyaniline, ethylene glycol, and a combination thereof. As the electric potential increases, 0-10KV/mm, the rheology (change in viscosity ranging from 1.0 cP to 200,000 cP) of the medium changes. In addition, the electric current increases the thermal energy of the entire system (Figure 15). However, in the fluid of the present invention, the copper coating absorbs all the excess thermal energy produced. Thus, simultaneous rheology and thermal control can be affected.
This fluid would be found to be highly useful in applications demanding instantaneous change in viscosity under severe temperature conditions, such as in aircraft seals, automobile clutches and brakes, and vibration isolation in structures.
Multifunctional Biological Fluid [0060] A fluid capable of delivering drugs to a targeted body site is disclosed. The selected drug is attached to a magnetic core of iron or ferrites, cobalt or nickel coated with an optical layer of fluorescent Au or Ag molecules. The fluid particles are then magnetically driven to the target site where the drug is desorbed. Optical capturing, which is a consequence of the fluorescent molecules, assists in the magnetic localization.
[0061] The fluid of the previous embodiment can be extended to io magnetic bioseparation and detection. For example, magnetic particles can be functionalized with a bioligand, which specifically binds to a target molecule, cell, toxin, pathogen, DNA, RNA, proteins, and other biochemicals.
This would isolate the required biomolecule from a mixture and the number of separated magnetic particles can be detected with the help of highly sensitive magnetic field sensors, such as HGMS (high gradient magnetic separators), or SQUID (Superconducting Quantum Interface Design).
[0062] All of these modules can be miniaturized and placed on a microchip where micropumps would inject the sample fluid into various microchambers/ microreactors. The microreactors will contain a multifunctional biological fluid with different anylate specificity. Embedded in the reactors would be highly sensitive magnetic particle sensors, which will transduce the signal in to a user-friendly output.
[0063] Based on the above, gas sensors for CO, C02, 02, and the like, chemical sensors for water and other liquids, and biological sensors for glucose, DNA, and the like can be easily made.
Frequency Agile Functional Fluids [0064] A functional fluid capable of switching from a RF
(radiofrequency) transparent to RF opaque state is disclosed. The core can be either magnetic, such as Fe, Co, Ni, etc., or conducting, such as Cu, Ag, Au, polymers, such as polyaniline, polypyrolle, etc., and the encapsulating 1o polymer matrix can be polystyrene or PMMA. Variations in electric or magnetic field will cause local permeability variations.to effect RF limiting features.
[0065] In another embodiment, indium tin oxide in a silica, alumina or titanium oxide matrix are subjected to varying electric fields. The electric field changes the oxidation state of the metal oxide particles, thereby exhibiting an electrochromic effect.
[0066] In yet another embodiment, semiconductor nanocrystals, such as CdSe are dispersed in a polymer matrix containing a dye. As the intensity of the light changes, a photochromic effect is observed. This is due to optical nonlinearity possessed by semiconductor species. These photochromic fluids may be made to form a flexible polymer sheet, which would be useful in making, for example, automatic automobile sunshades, etc.
Other Functional fluids [0067] Multifunctionality in fluids is highly desirable. In general, upon interaction of one energy form with the other, there is a creation of a third energy component to meet the law of conservation of energy. For example, SiC-based particles used as abrasives generate a lot of heat, which 1o may severely damage the surface they are acting on. The present invention addresses this by coating SiC particles with a coating of Au, Ag, Cu, Ni, or the like. An abrasive fluid, including SiC coated particles, can be used in sensitive applications, such as in microelectronics where heat is a big deterrent and causes damage to microelectronic circuitry. Other abrasive particles that can likewise be coated with a heat-absorbing material, include those made of boron carbide, iron carbide, aluminum oxide, zirconium oxide, titanium diboride, silica, yttrium-aluminum-garnet, or a combination thereof.
[0068] In another embodiment, SiC particles are coated with a pre-ceramic polymer, such as polysilsesquioxane or polycarbosilane. These are structural materials useful in flame-resistance and high temperature applications, where the pre-ceramic polymer turns into a ceramic with applied heat (Figure 16). The use of a polymer in structures generally gives the benefits of adhesion and aesthetics, while ceramics are used for high temperature stability.
[0069] In yet another embodiment, a self-lubricating high temperature functional fluid is disclosed. The core particle can be made of Cu, while the coatings can be of graphite, bismuth, indium or Teflon . The coated copper particles are dispersed in oils, such as hydraulic oil or mineral oil.
These fluids can be used in various engineering structures, such as engines and transmission housing.
[0070] In yet another embodiment, a quenching fluid used in heat-treating operation of metals, such as quenching, tempering, 1o austempering and martempering is disclosed. The fluid removes heat from the heated metal. The cooling rate determines the microstructure, such as grain size, grain shape and phase (alpha, gamma, beta, delta, austenite, matensite, bainite, pearlite, cementite) composition of the part being made. The cooling rate can be adjusted by adjusting the thermal conductivity of the fluid. By 1s incorporating polymer-coated particles with desired thermal conductivities in the quenching fluid, the cooling rate can be adjusted or controlled. The coating thickness preferably varies from 1 nm to 100 pm with the number of layers ranging preferably from one to ten. The polymer coating is preferably based on polyalkylene glycol, polyvinyl alcohol, or a combination thereof. The 20 particles can be metals (aluminum, titanium, copper, silicon, zinc, iron, cobalt, nickel, chromium, bismuth, silver, tungsten, molybdenum, or a combination thereof), ceramics (graphite, aluminum oxide, silicon oxide, beryllium oxide, titanium boride, molybdenum boride, silicon carbide, boron carbide, zirconium boride, hafnium boride, aluminium nitride, iron oxide, or a combination thereof) intermetallics (molybdenum silicide, titanium aluminides, nickel aluminides, berrylides, or a combination thereof), or a combination thereof.
The coated particles can be dispersed in water, oil (mineral oil, silicone oil, hydraulic oil, synthetic oil, or a combination thereof) or an emulsion (sodium dodecyl sulfate in water, polyethylene glycol in water, polyvinyl alcohol in water, oil in water, polystyrene in water, polyacrylamide in water, or a combination thereof). The composition of the particles can be tailored to obtain different thermal conductivities (0 - 400 W/m. K) in the fluid.
Similarly, by adjusting the quantity of the particles (1- 90 volume %) in the fluid, thermal 1o conductivities can be adjusted.
Example 1 [0071] Powder particles of iron with particle size of about 20 nm were synthesized from iron pentacarbonyl using microwave plasma synthesis technique. Argon was used as the plasma gas. The iron powders were subsequently coated with a layer of copper measuring with variable thickness (about 1 nm to 1000 nm) using a chemical synthesis technique. These powders were coated with sodium hexametaphosphate for dispersion in hydraulic oil for use as magneto-rheological fluids with a thermal control.
The viscosity of the fluid could be changed by the application of a magnetic field to effect damping in shock absorbers used in automobiles and machinery. The copper coating will dissipate the heat generated from the motion of the moving parts in the damper.
[0072] Table 4 below shows the effect of the applied magnetic field on the yield stress. The magnetic field is varied by varying the current that is applied. The change in yield stress is effected as a result in the change of viscosity. In other words, an increase in yield stress signifies a higher viscosity.
Table 4: Change in Yield Stress with Applied Current Applied Current (Amps) Stress (Pascal) 0 208.0 0.2 332.8 0.4 583.2 0.6 916.0 0.8 1291.2 1.0 1562.4 1.2 1791.2 1.4 1978.4 1.6 2145.6 1.8 2332.8 2.0 2416.0 Example 2 [0073] Ultrafine particles of aluminum oxide with a particle size of about 1 nm to 200 nm were prepared using microwave plasma synthesis of aluminum hydroxide using oxygen as the plasma gas. The nanoparticles were coated with a layer of cetyl trimethyl ammonium bromide with a coating thickness from about 1 nm to 20 nm. The coated particles were dispersed in a polyetherimide (PEI) polymer. The particles increased the inherent flame retardancy of the polymer while the fillers increased the mechanical properties and resistance to wear.
PEI PEI+5wt% PEI+ 10wt%
Nano Nano Aluminum Aluminum Oxide Oxide Average Heat Release 24.72 24.19 22.23 Rate KW/m2 Peak Heat Release Rate 72.65 68.05 66.52 KW/m2 Total Heat Release 5.26 5.06 4.33 MJ/m2 Time for Extinction of 22 16 14 Flame (sec) Example 3 [0074] Powder particles of iron with particle size ranging from about 1 nm to 40 pm were synthesized by microwave plasma synthesis using iron pentacarbonyl as the source and argon as the plasma gas. The powder io particles were coated with a layer of polystyrene. The polystyrene coating was carried out in the gas phase in the microwave plasma synthesis. The thickness of the polystyrene ranges from about 1 nm to 100nm. The coated particles are dispersed in a carrier fluid such as saline solution, water or blood for injection into a human body. These particles may be surface modified with is various procoagulants such as thrombin, factor 7A and like for arresting internal hemorrhage. Also, the particles may be attached with various antibodies/drugs/antigens for toxin, purification, isolation of biomolecules, water and chemical pollution and like.
Example 4 [0075] Aluminum nitride powders with a particle size of about 1 nm to 10 pm were coated with an about 1 nm to 100 nm layer of ethyl cyano acrylate using microwave plasma technique. The aluminum nitride powders were prepared using microwave plasma synthesis of trimethyl aluminum and ammonia. The coated aluminum nitride particles are then dispersed in an 1o adhesive resin for mounting heat sinks to electronic substrates. The aluminum nitride provides effective heat dissipation due to its high thermal conductivity as well as provide good mechanical strength to the adhesive.
Example 5 [0076] Copper powders with a particle size of about 1 nm to 50 pm were mixed in a solution of ethylene glycol and water. The concentration of the copper powders in the ethylene glycol solution varied from about 10 vol% to 60 vol%. This fluid is used for heat transfer in furnaces, pumps and engines. The ethylene glycol acts as a rust inhibitor while the copper powders help in the removal of heat.
[0077] While this invention has been described as having preferred sequences, ranges, steps, materials, or designs, it is understood that it includes further modifications, variations, uses and/or adaptations thereof following in general the principle of the invention, and including such departures from the present disclosure as those come within the known or customary practice in the art to which the invention pertains, and as may be applied to the central features hereinbeforesetforth, and fall within the scope of the invention and of the limits of the appended claims.
The following references provide exemplary procedural or other details supplementary to those set forth herein.
1. Azuma, Y. et at. "Coating of ferric oxide particles with silica by hydrolysis of TEOS", Journal of the Ceramic Society of Japan, 100(5), 646-51 (May 1992).
2. Atarashi, T. et al. "Synthesis of ethylene-glycol-based magnetic fluid using silica-coated iron particle", Journal of Magnetism and Magnetic Materials, 201, 7-10 (1999).
3. Homola, A. M. et al. "Novel Magnetic Dispersions Using Silica Stabilized Particles", IEEE Transactions on Magnetics, 22 (5), 716-719 (September 1986).
4. Girl, A. et al. "AC Magnetic Properties of Compacted FeCo Nanocomposites", Mater. Phys. and Mechanics, 1, 1-10 (2000).
[0033] Preferable examples of the shape of the particles, utilized in the present invention, include spherical, needle-shaped, cubic, oval, irregular, cylindrical, diamond-shaped, lamellar, polyhedral, and a combination thereof (Figure 1).
[0034] The present invention involves uniformly coating particles (noted above) with adherent layers of one or more materials, either in the gas or the liquid phase using techniques, such as sol-gel, chemical precipitation, chemical vapor deposition, plasma vapor deposition, gas phase condensation, evaporation and sublimation. During the gas phase process, the precursors or starting materials for synthesizing particles, as well as the coating material (in liquid or molten form) are subjected to high thermal energy. The uniformity and extent of coating(s) are controlled by varying operating parameters, such as temperature, feeding rate and proportions (of the starting materials or precursors), and the pressure of the process. The number of coated layers will depend simply on the feed composition and their concentration. One of the important advantages of the gas phase coating process is that it does not allow any gases or static charges to get adsorbed on the particle surface, thereby maintaining phase purity.
[0035] The liquid phase process is typically a chemical synthesis route in which the coating is established by reduction of the precursor (or starting material) while the favorable reaction site is the surface of the particles. In contrast to the gas phase reaction, this technique proves useful 1o only in materials, which readily undergo reduction in a solution phase.
Inert species, such as gold or silver, and gel forming polymers, such as polyethylene glycol and dextran, are a few examples. One of the primary advantages of this technique is that coating is established in stages, which gives precise control over the coating thickness and uniformity of layers in a is multilayered system.
[0036] In the case of polymer coating, the solution route may be similar to a core-shell polymerization while the gas phase would relate to a thermally assisted free radical polymerization reaction. The type of polymer 20 (hydrophilic, i.e., water-loving, or hydrophobic, i.e., insoluble in water) would decide the nature of carrier fluid, such as water, oil, or the like, in which these coated particles can be effectively dispersed.
[0037] Preferably, one to ten coatings are provided, and each 25 has a thickness range of about 1 nm to 500 pm, and preferably 1 nm to 10 pm. The coatings can have generally the same or varying thicknesses. It is noted that it is within the scope of the present invention to provide more than ten coatings of a different range of thickness.
[0038] The coating can be made of metal, polymer, ceramic material, intermetallic material, alloy, or a combination thereof. Preferable examples of the metal include iron, cobalt, nickel, copper, gold, silver, chromium, tungsten, silicon, aluminum, zinc, magnesium, titanium, molybdenum, tin, indium, bismuth, vanadium, magnesium, germanium, 1o zirconium, niobium, rhenium, iridium, cadmium, indium, hafnium, tantalum, platinum, neodymium, gallium, zinc, and a combination thereof. Preferable examples of the polymer include polyethylene glycol, sorbitol, manitol, starch, dextran, polymethyl methacrylate, polyaniline, polystyrene, poly pyrolle, N-isopropyl acrylamide, acrylamide, lecithin, and a combination thereof.
1s Preferable examples of the ceramic material include iron oxide, zinc ferrite, manganese ferrite, zinc oxide, aluminum oxide, silicon dioxide, silicon carbide, boron carbide, carbon and its types, indium oxide, titania, aluminum nitride, zirconia, tin oxide, chromium oxide, yttrium oxide, niobium oxide, hafnium oxide, tantalum oxide, tungsten oxide, magnesium oxide, boron nitride, silicon 20 nitride, hafnium nitride, tantalum nitride, tungsten nitride, iron nitride, vanadium nitride, titanium, silicon carbide, chromium carbide, vanadium carbide, titanium carbide, iron carbide, zirconium carbide, niobium carbide, hafnium carbide, tungsten carbide, tantalum carbide, titanium diboride, vanadium boride, iron boride, zirconium diboride, hafnium diboride, tantalum diboride, nickel boride, cobalt boride, chromium boride, and a combination thereof. Preferable examples of the intermetallic material include titanium aluminide, niobium aluminide, iron aluminide, nickel aluminide, ruthenium aluminide, iridium aluminide, chromium aluminide, titanium silicide, niobium silicide, zirconium silicide, molybdenum silicide, hafnium silicide, tantalum silicide, tungsten silicide, iron silicide, cobalt silicide, nickel silicide, magnesium silicide, yttrium silicide, cadmium silicide, berryllium oxide, nickel berryllide, niobium berryllide, tantalum berryllide, yttrium berryllide, tantalum berryllide, zirconium berryllide, and a combination thereof. Preferable to examples of the alloy include indium tin oxide, cadmium selenide, iron-cobalt, ferro-nickel, ferro-silicon, ferro-manganese, ferro-magnesium, brass, bronze, steel, a combination of two or more of the aforementioned metals, and a combination thereof.
[0039] The final property of the fluid will preferably depend upon the nature and type of carrier medium. In one embodiment, water alone can be used. However, water miscible organic solvents, such as ethanol, glycerol, ethylene glycol, propanol, dimethyl formamide, and the like can be used.
Water-based carrier fluids may also be used in various biological applications, such as imaging or drug targeting. In another embodiment, wherein the application requires higher viscosity, oil may be used. The coated particle, when dispersed in a high viscosity fluid, would reduce their natural Brownian motion, thereby rendering a higher level of stability to the system.
[0040] A non-limiting example of the carrier fluid that may be used in the present invention, includes water, mineral oil, hydraulic oil, silicone oil, vegetable oil (corn oil, peanut oil and the like), ethanol, glycerol, ethylene glycol, propanol, dimethyl formamide, paraffin wax, and a combination thereof.
[0041] The particles and their respective coatings essentially define the properties for the entire fluid. However, properties, such as optical, thermal or magnetic, are all dependent upon the force distribution between 1o the particles, which is closely related to the interparticle distance. In general, microscopic properties are strongly affected by the force fields and the interfacial contact area. In order to get superior functionality, it is preferred that the particles do not agglomerate. The present invention therefore utilizes a dispersant (or surfactant) stabilized system, wherein the agent assists the particles in remaining dispersed and reduces their tendency to get settled.
Preferable examples of surfactants include: dextran, starch, lecithin, glycol, glycerol, sorbitol, manitol, oleic acid, polyethylene glycol, and a combination thereof.
[0042] Figures 2-4 illustrate an embodiment of a multifunctional particle MFP made in accordance with the present invention. As shown in Figure 2, a core particle 10, made of a magnetic material (iron), is provided with three layers 12, 14 and 16 of optically-sensitive (gold), heat-absorbing (copper), and electrically-conductive (silica) materials, respectively. Figure illustrates a multifunctional particle MFP, which includes a core particle 18 provided with two layers 20 and 22 of the same thickness, and Figure 4 illustrates a multifunctional particle MFP, which includes a core particle 24 provided with two layers 26 and 28 of different thicknesses.
[0043] Figure 5 illustrates a fluid wherein multifunctional particles MFP, each including a core particle 30 with two layers 32 and 34, are dispersed in a suitable carrier medium 36 to form a multifunctional fluid or composition.
[0044] The present invention provides fluids which can exhibit multifunctional characteristics. These include optical, magnetic, thermal, electrical, rheological and biological properties that can be controlled (or altered) by one or more external stimuli. The core particle represents the main properties, while the coatings and the carrier medium contribute to other accompanying functionalities. The fluid according to the present invention, preferably contains all the components, which are non-interactive and the properties do not interact with each other.
[0044.1] In order to achieve the highest performance efficiency, it is desirable that both the core and one or more coatings remain intact. In particular, since the selected and/or the desired properties are derived from the core and coating(s), it is preferred that the core and coating(s) remain stable and intact from the time of manufacture to storage and through use. If the coating(s) was to separate from the core, dissolve or otherwise disintegrate, the utility of the coated particulate material would be compromised or lost. Thus, the core and coating(s) are designed or manufactured so as not to dissociate, dissolve or disintegrate due, for example, to temperature variations, interaction with moisture, soil, water, bodily fluids, etc. The coating(s) is, therefore, permanent or non-sacrificial in nature. In this regard, it is preferred that the core and coating(s) remain stable for a period of at least one year, from manufacture.
[0044.2] Preferably, one of the coatings is made of or includes a surfactant material, and alone, or with the core, provides the particulate material and/or the composition with at least one property selected from the group including magnetic, thermal, optical, electrical, biological, chemical, lubrication, rheological, and a combination thereof.
[0045] The following embodiments illustrate non-limiting examples of various types of fluids prepared in accordance of the present invention.
16a Magneto-Responsive Functional Fluids 10046] Magnetic particles, preferably of Fe, Co, Ni, Fe203 or ferrites (about 2% to 90 vol% concentrations, i.e., about 2 to 90 vol% of the fluid is comprised of the magnetic particles, dispersed in various media, such s as water, mineral oil, glycerol, elastomers, polymeric liquids, organic solvents and the like, exhibit a change in viscosity upon interaction with a magnetic field (Figure 6). The change in rheology can be controlled by intrinsically altering the magnetic properties of the particles or by variation in the magnitude of the external magnetic field. The magnetic properties, such as io magnetic saturation and coercivity, of the particles are dependent upon the shape and size of the particle, which can be precisely controlled and varied in the present invention (see Tables 2 and 3 below). In some applications that demand variable rheological behavior or gradient, the use of a mixture of particles, such as a mixture of iron and cobalt, mixture of iron and samarium-15 cobalt alloy, with different magnetic moments is preferred over a single component fluid.
[0047] One example is coating of magnetic particles with thermally conducting metal, such as copper, aluminum, silica, aluminum 20 oxide, and tungsten. This can be introduced via a conventionally known reverse miceller procedure, wherein the coating is established in a solution phase. The thermal coating would absorb any heat, which may have been generated due to the motion of particles in the medium. These fluids are useful in all mechanical applications of magnetic fluid technology, such as dampers, clutches and shock absorbers.
Table 2: Change in Coercivity with Particle Size Material Particle Size Coercivity (Oe) Iron 25 nm 460 100 nm 360 Cobalt 45 nm 157 150 nm 128 Iron Oxide 40 nm 176 150 nm 200 Table 3: Change in Magnetic Saturation with Particle Size Material Particle Size Magnetic Saturation (emu/gm) Iron 25 nm 170 100 nm 140 Cobalt 45 nm 60 150 nm 135 Iron Oxide 40 nm 40 150 nm 125 [0048] In another embodiment, magnetic particles are dispersed in an optically clear matrix, such a polymethyl methacrylate (PMMA), polycarbonate, indium oxide, or the like polymer. Optically clear materials in general are transparent to white light and have very low coefficient of absorption. The turbidity (or transparency) would be a function of the loading level of the particles. However, at constant solid's content, the application of magnetic field would align the particles, thereby forming a layered structure (Figure 7). When the distance between the layers is about one-half the order of magnitude of visible light, 400-800 nm, classical Bragg diffraction will result io in forbidden bands at typical frequencies. These forbidden states will disappear as soon as the magnetic field is removed and allow light of all wavelengths to pass, thus forming an on-off magnetically controlled optical switch. The size of the particles and their concentration (vol% in the fluid) will determine the maximum dip in intensity, while the distance between the is chains of magnetic particles will determine the frequency of the photonic bandgap. Thus, color agile switches can be made. An example is a 500 nm colloidal silica suspension at about 70 % concentration in a titanium oxide matrix.
20 [0049] In yet another embodiment, coated polymer magnetic particles exhibited sharp magnetic switching effects. This is believed to be due to the dipolar contribution of the polymer that directly influences the inter-particle interactions. Magnetic bistability and switching at low fields obtained in polymer-coated particles would be desirable in systems where the impedance in response to electrical or magnetic stimuli needs to be monitored with high precision. These compositions would therefore be of interest in, for example, RF switching and EMI shielding applications.
[0050] The above-noted fluids can be slightly modified to obtain magnetically controlled conductive composites, wherein magnetic particles, such as ferrites, are doped in conductive polymers, such as polyaniline, or polyphenylene vinylenes (PPV). As the particles are aligned in chains, an increase in electrical pathway is seen (Figure 8). Hence, a magnetically 1o tunable composite fluid can be produced in accordance with the present invention.
[0051] Using the magnetic fluid technology, a biological fluid is produced. This fluid includes biocompatible magnetic particles. The biocompatibility is due of the coating of polymers, such as dextran, starch, polyethylene glycol, sorbitol, or the like. The fluid can be injected inside the body to arrest internal hemorrhage or seal off blood vessels in order to inhibit angiogenesis. The sealing action is a result of a reversible viscosity increase in the presence of an externally positioned magnet.
[0052] As shown in Figure 9, magnetic particles 38, coated with a biocompatible surfactant and/or surface attached with desirable reagent/medicine/drug, are dispersed in a blood vessel 40. The particles 38 are aligned to form a blockage 42 upon application of a magnetic field by magnets 44, thereby arresting hemorrhage 46.
[0053] Figure 10 illustrates the use of magnetic particles 38 in inhibiting angiogenesis. As shown, particles 38 are carried through the blood vessel 48 that feeds the target organ 50. The application of a magnetic field by magnets 52 causes agglomeration 54 of the particles carrying the desired drug.
Optical Fluids [0054] A fluid which exhibits optical multifunctionality is 1o disclosed. This fluid is capable of transmitting visible light at a broad range of temperature range. The optical properties of fluids seem to drastically change as a function of increasing temperature, typically increasing their attenuation.
In accordance with the present invention, optically clear ceramic particles, such as ZnO or InO, are coated with a thin layer of copper having a thickness of about 10 nm to 100 nm. The coating thickness is limited by the optical clarity of the fluid. When the fluid is subjected to a temperature increase, all or part of the heat is absorbed by the surrounding copper layer, thereby averting any turbidity that may have been caused due to the input of heat.
[0055] In another embodiment, semiconductor nanocrystals, such as gallium arsenide, silicon carbide, silicon, germanium, cadmium selenide, and a combination thereof, are dispersed in an index matching liquid, such as water, oil, mixture of water and oil, polyethylene glycol, polymethylmethacrylate, polyacrylamide, polystyrene, and a combination thereof. The fluid is subjected to a laser impulse of fixed wavelength. As the intensity of the input laser is increased, the refractive index mismatch increases, thereby lowering the transparency of the medium (Figure 11).
Hence, the transparency of the medium is a function of the intensity of the incident light source. Changing the size and loading levels of the nanocrystals can be used to tune the optical limiting frequency.
[0056] In yet another embodiment, Cu-coated ceramic particles are dispersed in a conducting matrix. The transparency of this fluid changes io from clear (about 100% transmittance) to opaque (0% transmittance), as a function of the varying electric field (OA to 1000A) (Figure 12). These fluids would be desirable in applications such as optical limiters.
[0057] The present invention further discloses luminescent particles of gold and silver, which have a characteristic size on the order of the wavelength of visible light. These particles are embedded in a thermally switchable polymer matrix, such as N-isoproplylacrylamide, polyvinyl alcohol, polyethylene glycol, polyalkelene glycol, and a combination thereof. These polymeric gels possess a lower critical solution temperature of about room temperature. Above and below this temperature, there are significant differences between the excluded free volumes, which change the configuration of the encapsulated particles resulting in change in color (Figure 13). This property could be used in the fabrication of, for example, a temperature sensor.
[0058] The embodiment of Figure 13, could be slightly modified to fabricate an optical sensing fluid. Colloidal particles of gold or silver, coated with molecular recognition species, are dispersed in an aqueous or clear organic carrier medium. The interaction of molecules with a chemical or biological stimuli would alter the local configuration of the particles, thereby changing their reflecting color (Figure 14).
Electro-responsive Functional Fluids [0059] An electrically tunable fluid is disclosed. This includes silica particles coated with Cu (about 10 nm to 10 pm thickness) in a dielectric solvent, such as water, mineral oil, polypyrole, polyaniline, ethylene glycol, and a combination thereof. As the electric potential increases, 0-10KV/mm, the rheology (change in viscosity ranging from 1.0 cP to 200,000 cP) of the medium changes. In addition, the electric current increases the thermal energy of the entire system (Figure 15). However, in the fluid of the present invention, the copper coating absorbs all the excess thermal energy produced. Thus, simultaneous rheology and thermal control can be affected.
This fluid would be found to be highly useful in applications demanding instantaneous change in viscosity under severe temperature conditions, such as in aircraft seals, automobile clutches and brakes, and vibration isolation in structures.
Multifunctional Biological Fluid [0060] A fluid capable of delivering drugs to a targeted body site is disclosed. The selected drug is attached to a magnetic core of iron or ferrites, cobalt or nickel coated with an optical layer of fluorescent Au or Ag molecules. The fluid particles are then magnetically driven to the target site where the drug is desorbed. Optical capturing, which is a consequence of the fluorescent molecules, assists in the magnetic localization.
[0061] The fluid of the previous embodiment can be extended to io magnetic bioseparation and detection. For example, magnetic particles can be functionalized with a bioligand, which specifically binds to a target molecule, cell, toxin, pathogen, DNA, RNA, proteins, and other biochemicals.
This would isolate the required biomolecule from a mixture and the number of separated magnetic particles can be detected with the help of highly sensitive magnetic field sensors, such as HGMS (high gradient magnetic separators), or SQUID (Superconducting Quantum Interface Design).
[0062] All of these modules can be miniaturized and placed on a microchip where micropumps would inject the sample fluid into various microchambers/ microreactors. The microreactors will contain a multifunctional biological fluid with different anylate specificity. Embedded in the reactors would be highly sensitive magnetic particle sensors, which will transduce the signal in to a user-friendly output.
[0063] Based on the above, gas sensors for CO, C02, 02, and the like, chemical sensors for water and other liquids, and biological sensors for glucose, DNA, and the like can be easily made.
Frequency Agile Functional Fluids [0064] A functional fluid capable of switching from a RF
(radiofrequency) transparent to RF opaque state is disclosed. The core can be either magnetic, such as Fe, Co, Ni, etc., or conducting, such as Cu, Ag, Au, polymers, such as polyaniline, polypyrolle, etc., and the encapsulating 1o polymer matrix can be polystyrene or PMMA. Variations in electric or magnetic field will cause local permeability variations.to effect RF limiting features.
[0065] In another embodiment, indium tin oxide in a silica, alumina or titanium oxide matrix are subjected to varying electric fields. The electric field changes the oxidation state of the metal oxide particles, thereby exhibiting an electrochromic effect.
[0066] In yet another embodiment, semiconductor nanocrystals, such as CdSe are dispersed in a polymer matrix containing a dye. As the intensity of the light changes, a photochromic effect is observed. This is due to optical nonlinearity possessed by semiconductor species. These photochromic fluids may be made to form a flexible polymer sheet, which would be useful in making, for example, automatic automobile sunshades, etc.
Other Functional fluids [0067] Multifunctionality in fluids is highly desirable. In general, upon interaction of one energy form with the other, there is a creation of a third energy component to meet the law of conservation of energy. For example, SiC-based particles used as abrasives generate a lot of heat, which 1o may severely damage the surface they are acting on. The present invention addresses this by coating SiC particles with a coating of Au, Ag, Cu, Ni, or the like. An abrasive fluid, including SiC coated particles, can be used in sensitive applications, such as in microelectronics where heat is a big deterrent and causes damage to microelectronic circuitry. Other abrasive particles that can likewise be coated with a heat-absorbing material, include those made of boron carbide, iron carbide, aluminum oxide, zirconium oxide, titanium diboride, silica, yttrium-aluminum-garnet, or a combination thereof.
[0068] In another embodiment, SiC particles are coated with a pre-ceramic polymer, such as polysilsesquioxane or polycarbosilane. These are structural materials useful in flame-resistance and high temperature applications, where the pre-ceramic polymer turns into a ceramic with applied heat (Figure 16). The use of a polymer in structures generally gives the benefits of adhesion and aesthetics, while ceramics are used for high temperature stability.
[0069] In yet another embodiment, a self-lubricating high temperature functional fluid is disclosed. The core particle can be made of Cu, while the coatings can be of graphite, bismuth, indium or Teflon . The coated copper particles are dispersed in oils, such as hydraulic oil or mineral oil.
These fluids can be used in various engineering structures, such as engines and transmission housing.
[0070] In yet another embodiment, a quenching fluid used in heat-treating operation of metals, such as quenching, tempering, 1o austempering and martempering is disclosed. The fluid removes heat from the heated metal. The cooling rate determines the microstructure, such as grain size, grain shape and phase (alpha, gamma, beta, delta, austenite, matensite, bainite, pearlite, cementite) composition of the part being made. The cooling rate can be adjusted by adjusting the thermal conductivity of the fluid. By 1s incorporating polymer-coated particles with desired thermal conductivities in the quenching fluid, the cooling rate can be adjusted or controlled. The coating thickness preferably varies from 1 nm to 100 pm with the number of layers ranging preferably from one to ten. The polymer coating is preferably based on polyalkylene glycol, polyvinyl alcohol, or a combination thereof. The 20 particles can be metals (aluminum, titanium, copper, silicon, zinc, iron, cobalt, nickel, chromium, bismuth, silver, tungsten, molybdenum, or a combination thereof), ceramics (graphite, aluminum oxide, silicon oxide, beryllium oxide, titanium boride, molybdenum boride, silicon carbide, boron carbide, zirconium boride, hafnium boride, aluminium nitride, iron oxide, or a combination thereof) intermetallics (molybdenum silicide, titanium aluminides, nickel aluminides, berrylides, or a combination thereof), or a combination thereof.
The coated particles can be dispersed in water, oil (mineral oil, silicone oil, hydraulic oil, synthetic oil, or a combination thereof) or an emulsion (sodium dodecyl sulfate in water, polyethylene glycol in water, polyvinyl alcohol in water, oil in water, polystyrene in water, polyacrylamide in water, or a combination thereof). The composition of the particles can be tailored to obtain different thermal conductivities (0 - 400 W/m. K) in the fluid.
Similarly, by adjusting the quantity of the particles (1- 90 volume %) in the fluid, thermal 1o conductivities can be adjusted.
Example 1 [0071] Powder particles of iron with particle size of about 20 nm were synthesized from iron pentacarbonyl using microwave plasma synthesis technique. Argon was used as the plasma gas. The iron powders were subsequently coated with a layer of copper measuring with variable thickness (about 1 nm to 1000 nm) using a chemical synthesis technique. These powders were coated with sodium hexametaphosphate for dispersion in hydraulic oil for use as magneto-rheological fluids with a thermal control.
The viscosity of the fluid could be changed by the application of a magnetic field to effect damping in shock absorbers used in automobiles and machinery. The copper coating will dissipate the heat generated from the motion of the moving parts in the damper.
[0072] Table 4 below shows the effect of the applied magnetic field on the yield stress. The magnetic field is varied by varying the current that is applied. The change in yield stress is effected as a result in the change of viscosity. In other words, an increase in yield stress signifies a higher viscosity.
Table 4: Change in Yield Stress with Applied Current Applied Current (Amps) Stress (Pascal) 0 208.0 0.2 332.8 0.4 583.2 0.6 916.0 0.8 1291.2 1.0 1562.4 1.2 1791.2 1.4 1978.4 1.6 2145.6 1.8 2332.8 2.0 2416.0 Example 2 [0073] Ultrafine particles of aluminum oxide with a particle size of about 1 nm to 200 nm were prepared using microwave plasma synthesis of aluminum hydroxide using oxygen as the plasma gas. The nanoparticles were coated with a layer of cetyl trimethyl ammonium bromide with a coating thickness from about 1 nm to 20 nm. The coated particles were dispersed in a polyetherimide (PEI) polymer. The particles increased the inherent flame retardancy of the polymer while the fillers increased the mechanical properties and resistance to wear.
PEI PEI+5wt% PEI+ 10wt%
Nano Nano Aluminum Aluminum Oxide Oxide Average Heat Release 24.72 24.19 22.23 Rate KW/m2 Peak Heat Release Rate 72.65 68.05 66.52 KW/m2 Total Heat Release 5.26 5.06 4.33 MJ/m2 Time for Extinction of 22 16 14 Flame (sec) Example 3 [0074] Powder particles of iron with particle size ranging from about 1 nm to 40 pm were synthesized by microwave plasma synthesis using iron pentacarbonyl as the source and argon as the plasma gas. The powder io particles were coated with a layer of polystyrene. The polystyrene coating was carried out in the gas phase in the microwave plasma synthesis. The thickness of the polystyrene ranges from about 1 nm to 100nm. The coated particles are dispersed in a carrier fluid such as saline solution, water or blood for injection into a human body. These particles may be surface modified with is various procoagulants such as thrombin, factor 7A and like for arresting internal hemorrhage. Also, the particles may be attached with various antibodies/drugs/antigens for toxin, purification, isolation of biomolecules, water and chemical pollution and like.
Example 4 [0075] Aluminum nitride powders with a particle size of about 1 nm to 10 pm were coated with an about 1 nm to 100 nm layer of ethyl cyano acrylate using microwave plasma technique. The aluminum nitride powders were prepared using microwave plasma synthesis of trimethyl aluminum and ammonia. The coated aluminum nitride particles are then dispersed in an 1o adhesive resin for mounting heat sinks to electronic substrates. The aluminum nitride provides effective heat dissipation due to its high thermal conductivity as well as provide good mechanical strength to the adhesive.
Example 5 [0076] Copper powders with a particle size of about 1 nm to 50 pm were mixed in a solution of ethylene glycol and water. The concentration of the copper powders in the ethylene glycol solution varied from about 10 vol% to 60 vol%. This fluid is used for heat transfer in furnaces, pumps and engines. The ethylene glycol acts as a rust inhibitor while the copper powders help in the removal of heat.
[0077] While this invention has been described as having preferred sequences, ranges, steps, materials, or designs, it is understood that it includes further modifications, variations, uses and/or adaptations thereof following in general the principle of the invention, and including such departures from the present disclosure as those come within the known or customary practice in the art to which the invention pertains, and as may be applied to the central features hereinbeforesetforth, and fall within the scope of the invention and of the limits of the appended claims.
The following references provide exemplary procedural or other details supplementary to those set forth herein.
1. Azuma, Y. et at. "Coating of ferric oxide particles with silica by hydrolysis of TEOS", Journal of the Ceramic Society of Japan, 100(5), 646-51 (May 1992).
2. Atarashi, T. et al. "Synthesis of ethylene-glycol-based magnetic fluid using silica-coated iron particle", Journal of Magnetism and Magnetic Materials, 201, 7-10 (1999).
3. Homola, A. M. et al. "Novel Magnetic Dispersions Using Silica Stabilized Particles", IEEE Transactions on Magnetics, 22 (5), 716-719 (September 1986).
4. Girl, A. et al. "AC Magnetic Properties of Compacted FeCo Nanocomposites", Mater. Phys. and Mechanics, 1, 1-10 (2000).
Claims (43)
1. A multifunctional particulate material, comprising:
a) a predetermined amount of core particles with one or more coatings; and b) one of said one or more coatings comprising a permanent surfactant coating, wherein the core particles and/or at least one of said one or more coatings provides the particulate material with at least one property selected from the group consisting of magnetic, thermal, optical, electrical, biological, chemical, lubrication, rheological, and a combination thereof;
and c) said core particles having an average particle size of about 1nm to 500µm.
a) a predetermined amount of core particles with one or more coatings; and b) one of said one or more coatings comprising a permanent surfactant coating, wherein the core particles and/or at least one of said one or more coatings provides the particulate material with at least one property selected from the group consisting of magnetic, thermal, optical, electrical, biological, chemical, lubrication, rheological, and a combination thereof;
and c) said core particles having an average particle size of about 1nm to 500µm.
2. The particulate material of Claim 1, wherein:
a) said core particles comprise a member selected from the group consisting of a metal, a polymer, a ceramic material, an intermetallic material, an alloy, and a combination thereof.
a) said core particles comprise a member selected from the group consisting of a metal, a polymer, a ceramic material, an intermetallic material, an alloy, and a combination thereof.
3. The particulate material of Claim 2, wherein:
a) the metal is selected from the group consisting of copper, cobalt, nickel, aluminum, iron, tin, gold, silver, chromium, molybdenum, tungsten, zinc, silicon, magnesium, titanium, vanadium, magnesium, germanium, zirconium, niobium, rhenium, iridium, cadmium, indium, hafnium, tantalum, platinum, neodymium, gallium, zinc, an alloy, an oxide, and a combination thereof.
a) the metal is selected from the group consisting of copper, cobalt, nickel, aluminum, iron, tin, gold, silver, chromium, molybdenum, tungsten, zinc, silicon, magnesium, titanium, vanadium, magnesium, germanium, zirconium, niobium, rhenium, iridium, cadmium, indium, hafnium, tantalum, platinum, neodymium, gallium, zinc, an alloy, an oxide, and a combination thereof.
4. The particulate material of Claim 2, wherein:
a) the polymer is selected from the group consisting of polystyrene, polymethyl methacrylate, polyvinyl alcohol, polyphenylene vinylene, and a combination thereof.
a) the polymer is selected from the group consisting of polystyrene, polymethyl methacrylate, polyvinyl alcohol, polyphenylene vinylene, and a combination thereof.
5. The particulate material of Claim 2, wherein:
a) the ceramic material is selected from the group consisting of iron oxide, zinc ferrite, manganese ferrite, zinc oxide, aluminum oxide, silicon dioxide, silicon carbide, boron carbide, carbon, indium oxide, titania, aluminum nitride, zirconia, tin oxide, chromium oxide, yttrium oxide, niobium oxide, hafnium oxide, tantalum oxide, tungsten oxide, magnesium oxide, boron nitride, silicon nitride, hafnium nitride, tantalum nitride, tungsten nitride, iron nitride, vanadium nitride, silicon carbide, chromium carbide, vanadium carbide, titanium carbide, iron carbide, zirconium carbide, niobium carbide, hafnium carbide, tungsten carbide, tantalum carbide, titanium diboride, vanadium boride, iron boride, zirconium diboride, hafnium diboride, tantalum diboride, nickel boride, cobalt boride, chromium boride and a combination thereof.
a) the ceramic material is selected from the group consisting of iron oxide, zinc ferrite, manganese ferrite, zinc oxide, aluminum oxide, silicon dioxide, silicon carbide, boron carbide, carbon, indium oxide, titania, aluminum nitride, zirconia, tin oxide, chromium oxide, yttrium oxide, niobium oxide, hafnium oxide, tantalum oxide, tungsten oxide, magnesium oxide, boron nitride, silicon nitride, hafnium nitride, tantalum nitride, tungsten nitride, iron nitride, vanadium nitride, silicon carbide, chromium carbide, vanadium carbide, titanium carbide, iron carbide, zirconium carbide, niobium carbide, hafnium carbide, tungsten carbide, tantalum carbide, titanium diboride, vanadium boride, iron boride, zirconium diboride, hafnium diboride, tantalum diboride, nickel boride, cobalt boride, chromium boride and a combination thereof.
6. The particulate material of Claim 2, wherein:
a) the intermetallic material is selected from the group consisting of titanium aluminide, niobium aluminide, iron aluminide, nickel aluminide, ruthenium uminide, iridium aluminide, chromium aluminide, titanium silicide, niobium silicide, zirconium silicide, molybdenum silicide, hafnium silicide, tantalum silicide, tungsten silicide, iron silicide, cobalt silicide, nickel silicide, magnesium silicide, yttrium silicide, cadmium silicide, berryllium oxide, nickel berryllide, niobium berryllide, tantalum berryllide, yttrium berryllide, tantalum berryllide, zirconium berryllide, and a combination thereof.
a) the intermetallic material is selected from the group consisting of titanium aluminide, niobium aluminide, iron aluminide, nickel aluminide, ruthenium uminide, iridium aluminide, chromium aluminide, titanium silicide, niobium silicide, zirconium silicide, molybdenum silicide, hafnium silicide, tantalum silicide, tungsten silicide, iron silicide, cobalt silicide, nickel silicide, magnesium silicide, yttrium silicide, cadmium silicide, berryllium oxide, nickel berryllide, niobium berryllide, tantalum berryllide, yttrium berryllide, tantalum berryllide, zirconium berryllide, and a combination thereof.
7. The particulate material of Claim 2, wherein:
a) the alloy is selected from the group consisting of indium tin oxide, cadmium selenide, iron-cobalt, ferro-nickel, ferro-silicon, ferro-manganese, ferro-magnesium, brass, bronze, steel, and a combination thereof.
a) the alloy is selected from the group consisting of indium tin oxide, cadmium selenide, iron-cobalt, ferro-nickel, ferro-silicon, ferro-manganese, ferro-magnesium, brass, bronze, steel, and a combination thereof.
8. The particulate material of Claim 1, wherein:
a) one of said one or more coatings has a thickness of about 1nm to 10µm.
a) one of said one or more coatings has a thickness of about 1nm to 10µm.
9. The particulate material of Claim 8, wherein:
a) a portion of said core particles includes up to ten of said coatings.
a) a portion of said core particles includes up to ten of said coatings.
10. The particulate material of Claim 8, wherein:
a) said coatings have varying thickness.
a) said coatings have varying thickness.
11. The particulate material of Claim 8, wherein:
a) said coatings have generally the same thickness.
a) said coatings have generally the same thickness.
12. The particulate material of Claim 1, wherein:
a) another one of said coatings comprises a member selected from the group consisting of a metal, a polymer, a ceramic material, an intermetallic material, and an alloy or a combination thereof.
a) another one of said coatings comprises a member selected from the group consisting of a metal, a polymer, a ceramic material, an intermetallic material, and an alloy or a combination thereof.
13. The particulate material of Claim 1, wherein:
a) said core particles comprise a general shape selected from the group consisting of a sphere, a needle, a cube, an oval, irregular, a cylinder, a diamond, a lamella, a polyhedron, and a combination thereof.
a) said core particles comprise a general shape selected from the group consisting of a sphere, a needle, a cube, an oval, irregular, a cylinder, a diamond, a lamella, a polyhedron, and a combination thereof.
14. The particulate material of Claim 12, wherein:
a) the metal is selected from the group consisting of iron, cobalt, nickel, copper, gold, silver, tungsten, silicon, aluminum, zinc, molybdenum, indium, bismuth, vanadium, magnesium, germanium, zirconium, niobium, rhenium, iridium, cadmium, indium, hafnium, tantalum, platinum, neodymium, gallium, zinc, and a combination thereof.
a) the metal is selected from the group consisting of iron, cobalt, nickel, copper, gold, silver, tungsten, silicon, aluminum, zinc, molybdenum, indium, bismuth, vanadium, magnesium, germanium, zirconium, niobium, rhenium, iridium, cadmium, indium, hafnium, tantalum, platinum, neodymium, gallium, zinc, and a combination thereof.
15. The particulate material of Claim 12, wherein:
a) the polymer is selected from the group consisting of polyethylene glycol, sorbitol, manitol, starch, dextran, poly methyl methacrylate, polyaniline, polystyrene, poly pyrolle, N-isopropyl acrylamide, acrylamide, lecithin, and a combination thereof.
a) the polymer is selected from the group consisting of polyethylene glycol, sorbitol, manitol, starch, dextran, poly methyl methacrylate, polyaniline, polystyrene, poly pyrolle, N-isopropyl acrylamide, acrylamide, lecithin, and a combination thereof.
16. The particulate material of Claim 12, wherein:
a) the ceramic material is selected from the group consisting of iron oxide, zinc ferrite, manganese ferrite, zinc oxide, aluminum oxide, silicon dioxide, silicon carbide, boron carbide, carbon, indium oxide, titania, aluminum nitride, zirconia, tin oxide, chromium oxide, yttrium oxide, niobium oxide, hafnium oxide, tantalum oxide, tungsten oxide, magnesium oxide, boron nitride, silicon nitride, hafnium nitride, tantalum nitride, tungsten nitride, iron nitride, vanadium nitride, titanium, silicon carbide, chromium carbide, vanadium carbide, titanium carbide, iron carbide, zirconium carbide, niobium carbide, hafnium carbide, tungsten carbide, tantalum carbide, titanium diboride, vanadium boride, iron boride, zirconium diboride, hafnium diboride, tantalum diboride, nickel boride, cobalt boride, chromium boride and a combination thereof.
a) the ceramic material is selected from the group consisting of iron oxide, zinc ferrite, manganese ferrite, zinc oxide, aluminum oxide, silicon dioxide, silicon carbide, boron carbide, carbon, indium oxide, titania, aluminum nitride, zirconia, tin oxide, chromium oxide, yttrium oxide, niobium oxide, hafnium oxide, tantalum oxide, tungsten oxide, magnesium oxide, boron nitride, silicon nitride, hafnium nitride, tantalum nitride, tungsten nitride, iron nitride, vanadium nitride, titanium, silicon carbide, chromium carbide, vanadium carbide, titanium carbide, iron carbide, zirconium carbide, niobium carbide, hafnium carbide, tungsten carbide, tantalum carbide, titanium diboride, vanadium boride, iron boride, zirconium diboride, hafnium diboride, tantalum diboride, nickel boride, cobalt boride, chromium boride and a combination thereof.
17. The particulate material of Claim 12, wherein:
a) the intermetallic material is selected from the group consisting of titanium aluminide, niobium aluminide, iron aluminide, nickel aluminide, ruthenium aluminide, iridium aluminide, chromium aluminide, titanium silicide, niobium silicide, zirconium silicide, molybdenum silicide, hafnium silicide, tantalum silicide, tungsten silicide, iron silicide, cobalt silicide, nickel silicide, magnesium silicide, yttrium suicide, cadmium silicide, berryllium oxide, nickel berryllide, niobium berryllide, tantalum berryllide, yttrium berryllide, tantalum berryllide, zirconium berryllide, and a combination thereof.
a) the intermetallic material is selected from the group consisting of titanium aluminide, niobium aluminide, iron aluminide, nickel aluminide, ruthenium aluminide, iridium aluminide, chromium aluminide, titanium silicide, niobium silicide, zirconium silicide, molybdenum silicide, hafnium silicide, tantalum silicide, tungsten silicide, iron silicide, cobalt silicide, nickel silicide, magnesium silicide, yttrium suicide, cadmium silicide, berryllium oxide, nickel berryllide, niobium berryllide, tantalum berryllide, yttrium berryllide, tantalum berryllide, zirconium berryllide, and a combination thereof.
18. The particulate material of Claim 12, wherein:
a) the alloy is selected from the group consisting of ferro-nickel, ferro-silicon, ferro-manganese, ferro-magnesium, brass, bronze, steel, and a combination thereof.
a) the alloy is selected from the group consisting of ferro-nickel, ferro-silicon, ferro-manganese, ferro-magnesium, brass, bronze, steel, and a combination thereof.
19. A multifunctional particulate composition, comprising:
a) a carrier medium;
b) a predetermined amount of a particulate material in said medium;
c) said particulate material comprising core particles with one or more coatings; and d) one of said one or more coatings comprising a permanent surfactant coating, wherein the core particles and/or at least one of said one or more coatings provides the particulate material with at least one property selected from the group consisting of magnetic, thermal, optical, electrical, biological, chemical, lubrication, rheological, and a combination thereof;
and e) said core particles having an average particle size of about 1nm to 500µm.
a) a carrier medium;
b) a predetermined amount of a particulate material in said medium;
c) said particulate material comprising core particles with one or more coatings; and d) one of said one or more coatings comprising a permanent surfactant coating, wherein the core particles and/or at least one of said one or more coatings provides the particulate material with at least one property selected from the group consisting of magnetic, thermal, optical, electrical, biological, chemical, lubrication, rheological, and a combination thereof;
and e) said core particles having an average particle size of about 1nm to 500µm.
20. The particulate composition of Claim 19, wherein:
a) said carrier medium comprises a fluid.
a) said carrier medium comprises a fluid.
21. The particulate composition of Claim 20, wherein:
a) said core particles comprise a member selected from the group consisting of a metal, a polymer, a ceramic material, an intermetallic material, an alloy, and a combination thereof.
a) said core particles comprise a member selected from the group consisting of a metal, a polymer, a ceramic material, an intermetallic material, an alloy, and a combination thereof.
22. The particulate composition of Claim 21, wherein:
a) the metal is selected from the group consisting of copper, cobalt, nickel, aluminum, iron, tin, gold, silver, chromium, copper, tungsten, zinc, silicon, molybdenum, magnesium, titanium, vanadium, magnesium, germanium, zirconium, niobium, rhenium, iridium, cadmium, indium, hafnium, tantalum, platinum, neodymium, gallium, zinc, an alloy, an oxide, and a combination thereof.
a) the metal is selected from the group consisting of copper, cobalt, nickel, aluminum, iron, tin, gold, silver, chromium, copper, tungsten, zinc, silicon, molybdenum, magnesium, titanium, vanadium, magnesium, germanium, zirconium, niobium, rhenium, iridium, cadmium, indium, hafnium, tantalum, platinum, neodymium, gallium, zinc, an alloy, an oxide, and a combination thereof.
23. The particulate composition of Claim 21, wherein:
a) the polymer is selected from the group consisting of polystyrene, polymethyl methacrylate, polyvinyl alcohol, polyphenylene vinylene, and a combination thereof.
a) the polymer is selected from the group consisting of polystyrene, polymethyl methacrylate, polyvinyl alcohol, polyphenylene vinylene, and a combination thereof.
24. The particulate composition of Claim 21, wherein:
a) the ceramic material is selected from the group consisting of iron oxide, zinc ferrite, manganese ferrite, zinc oxide, aluminum oxide, silicon dioxide, silicon carbide, boron carbide, carbon, indium oxide, titania, aluminum nitride, zirconia, tin oxide, chromium oxide, yttrium oxide, niobium oxide, hafnium oxide, tantalum oxide, tungsten oxide, magnesium oxide, boron nitride, silicon nitride, hafnium nitride, tantalum nitride, tungsten nitride, iron nitride, vanadium nitride, silicon carbide, chromium carbide, vanadium carbide, titanium carbide, iron carbide, zirconium carbide, niobium carbide, hafnium carbide, tungsten carbide, tantalum carbide, titanium diboride, vanadium boride, iron boride, zirconium diboride, hafnium diboride, tantalum diboride, nickel boride, cobalt boride, chromium boride, and a combination thereof.
a) the ceramic material is selected from the group consisting of iron oxide, zinc ferrite, manganese ferrite, zinc oxide, aluminum oxide, silicon dioxide, silicon carbide, boron carbide, carbon, indium oxide, titania, aluminum nitride, zirconia, tin oxide, chromium oxide, yttrium oxide, niobium oxide, hafnium oxide, tantalum oxide, tungsten oxide, magnesium oxide, boron nitride, silicon nitride, hafnium nitride, tantalum nitride, tungsten nitride, iron nitride, vanadium nitride, silicon carbide, chromium carbide, vanadium carbide, titanium carbide, iron carbide, zirconium carbide, niobium carbide, hafnium carbide, tungsten carbide, tantalum carbide, titanium diboride, vanadium boride, iron boride, zirconium diboride, hafnium diboride, tantalum diboride, nickel boride, cobalt boride, chromium boride, and a combination thereof.
25. The particulate composition of Claim 21, wherein:
a) the intermetallic material is selected from the group consisting of titanium aluminide, niobium aluminide, iron aluminide, nickel aluminide, ruthenium aluminide, iridium aluminide, chromium aluminide, titanium silicide, niobium silicide, zirconium silicide, molybdenum silicide, hafnium suicide, tantalum silicide, tungsten silicide, iron silicide, cobalt silicide, nickel silicide, magnesium silicide, yttrium silicide, cadmium silicide, berryllium oxide, nickel berryllide, niobium berryllide, tantalum berryllide, yttrium berryllide, tantalum berryllide, zirconium berryllide, and a combination thereof.
a) the intermetallic material is selected from the group consisting of titanium aluminide, niobium aluminide, iron aluminide, nickel aluminide, ruthenium aluminide, iridium aluminide, chromium aluminide, titanium silicide, niobium silicide, zirconium silicide, molybdenum silicide, hafnium suicide, tantalum silicide, tungsten silicide, iron silicide, cobalt silicide, nickel silicide, magnesium silicide, yttrium silicide, cadmium silicide, berryllium oxide, nickel berryllide, niobium berryllide, tantalum berryllide, yttrium berryllide, tantalum berryllide, zirconium berryllide, and a combination thereof.
26. The particulate composition of Claim 21, wherein:
a) the alloy is selected from the group consisting of indium tin oxide, cadmium selenide, iron-cobalt, ferro-nickel, ferro-silicon, ferro-manganese, ferro-magnesium, brass, bronze, steel, and a combination thereof.
a) the alloy is selected from the group consisting of indium tin oxide, cadmium selenide, iron-cobalt, ferro-nickel, ferro-silicon, ferro-manganese, ferro-magnesium, brass, bronze, steel, and a combination thereof.
27. The particulate composition of Claim 22, wherein:
a) one of said one or more coatings has a thickness of about 1nm to 10µm.
a) one of said one or more coatings has a thickness of about 1nm to 10µm.
28. The particulate composition of Claim 27, wherein:
a) a portion of said core particles includes up to ten of said coatings.
a) a portion of said core particles includes up to ten of said coatings.
29. The particulate composition of Claim 27, wherein:
a) said coatings have varying thicknesses.
a) said coatings have varying thicknesses.
30. The particulate composition of Claim 27, wherein:
a) said coatings have generally the same thickness.
a) said coatings have generally the same thickness.
31. The particulate composition of Claim 20, wherein:
a) an other one of said coatings comprises a member selected from the group consisting of a metal, a polymer, a ceramic material, an intermetallic material, an alloy, and a combination thereof.
a) an other one of said coatings comprises a member selected from the group consisting of a metal, a polymer, a ceramic material, an intermetallic material, an alloy, and a combination thereof.
32. The particulate composition of Claim 20, wherein:
a) said core particles comprise a general shape selected from the group consisting of a sphere, a needle, a cube, an oval, irregular, a cylinder, a diamond, a lamelia, a polyhedron, and a combination thereof.
a) said core particles comprise a general shape selected from the group consisting of a sphere, a needle, a cube, an oval, irregular, a cylinder, a diamond, a lamelia, a polyhedron, and a combination thereof.
33. The particulate composition of Claim 31, wherein:
a) the metal is selected from the group consisting of iron, cobalt, nickel, copper, gold, silver, tungsten, silicon, aluminum, zinc, molybdenum, indium, bismuth, vanadium, magnesium, germanium, zirconium, niobium, rhenium, iridium, cadmium, indium, hafnium, tantalum, platinum, neodymium, gallium, zinc, and a combination thereof.
a) the metal is selected from the group consisting of iron, cobalt, nickel, copper, gold, silver, tungsten, silicon, aluminum, zinc, molybdenum, indium, bismuth, vanadium, magnesium, germanium, zirconium, niobium, rhenium, iridium, cadmium, indium, hafnium, tantalum, platinum, neodymium, gallium, zinc, and a combination thereof.
34. The particulate composition of Claim 31, wherein:
a) the polymer is selected from the group consisting of polyethylene glycol, sorbitol, manitol, starch, dextran, poly methyl methacrylate, polyaniline, polystyrene, poly pyrolle, N-isopropyl acrylamide, acrylamide, lecithin, and a combination thereof.
a) the polymer is selected from the group consisting of polyethylene glycol, sorbitol, manitol, starch, dextran, poly methyl methacrylate, polyaniline, polystyrene, poly pyrolle, N-isopropyl acrylamide, acrylamide, lecithin, and a combination thereof.
35. The particulate composition of Claim 31, wherein:
a) the ceramic material is selected from the group consisting of iron oxide, zinc ferrite, manganese ferrite, zinc oxide, aluminum oxide, silicon dioxide, silicon carbide, boron carbide, carbon, indium oxide, titania, aluminum nitride, zirconia, tin oxide, chromium oxide, yttrium oxide, niobium oxide, hafnium oxide, tantalum oxide, tungsten oxide, magnesium oxide, boron nitride, silicon nitride, hafnium nitride, tantalum nitride, tungsten nitride, iron nitride, vanadium nitride, silicon carbide, chromium carbide, vanadium carbide, titanium carbide, iron carbide, zirconium carbide, niobium carbide, hafnium carbide, tungsten carbide, tantalum carbide, titanium diboride, vanadium boride, iron boride, zirconium diboride, hafnium diboride, tantalum diboride, nickel boride, cobalt boride, chromium boride, and a combination thereof.
a) the ceramic material is selected from the group consisting of iron oxide, zinc ferrite, manganese ferrite, zinc oxide, aluminum oxide, silicon dioxide, silicon carbide, boron carbide, carbon, indium oxide, titania, aluminum nitride, zirconia, tin oxide, chromium oxide, yttrium oxide, niobium oxide, hafnium oxide, tantalum oxide, tungsten oxide, magnesium oxide, boron nitride, silicon nitride, hafnium nitride, tantalum nitride, tungsten nitride, iron nitride, vanadium nitride, silicon carbide, chromium carbide, vanadium carbide, titanium carbide, iron carbide, zirconium carbide, niobium carbide, hafnium carbide, tungsten carbide, tantalum carbide, titanium diboride, vanadium boride, iron boride, zirconium diboride, hafnium diboride, tantalum diboride, nickel boride, cobalt boride, chromium boride, and a combination thereof.
36. The particulate composition of Claim 31, wherein:
a) the intermetallic material is selected from the group consisting of titanium aluminide, niobium aluminide, iron aluminide, nickel aluminide, ruthenium aluminide, iridium aluminide, chromium aluminide, titanium silicide, niobium silicide, zirconium silicide, molybdenum silicide, hafnium silicide, tantalum silicide, tungsten silicide, iron silicide, cobalt silicide, nickel silicide, magnesium silicide, yttrium silicide, cadmium silicide, berryllium oxide, nickel berryllide, niobium berryllide, tantalum berryllide, yttrium berryllide, tantalum berryllide, zirconium berryllide, and a combination thereof.
a) the intermetallic material is selected from the group consisting of titanium aluminide, niobium aluminide, iron aluminide, nickel aluminide, ruthenium aluminide, iridium aluminide, chromium aluminide, titanium silicide, niobium silicide, zirconium silicide, molybdenum silicide, hafnium silicide, tantalum silicide, tungsten silicide, iron silicide, cobalt silicide, nickel silicide, magnesium silicide, yttrium silicide, cadmium silicide, berryllium oxide, nickel berryllide, niobium berryllide, tantalum berryllide, yttrium berryllide, tantalum berryllide, zirconium berryllide, and a combination thereof.
37. The particulate composition of Claim 31, wherein:
a) the alloy is selected from the group consisting of ferro-nickel, ferro-silicon, ferro-manganese, ferro-magnesium, brass, bronze, steel, and a combination thereof.
a) the alloy is selected from the group consisting of ferro-nickel, ferro-silicon, ferro-manganese, ferro-magnesium, brass, bronze, steel, and a combination thereof.
38. The particulate composition of Claim 20, further comprising:
a) a dispersant.
a) a dispersant.
39. The particulate composition of Claim 38, wherein:
a) said dispersant is selected from the group consisting of polyethylene glycol, glycerol, sorbitol, manitol, dextran, starch, lecithin, and a combination thereof.
a) said dispersant is selected from the group consisting of polyethylene glycol, glycerol, sorbitol, manitol, dextran, starch, lecithin, and a combination thereof.
40. The particulate material of Claim 2, wherein:
a) the alloy comprises one or more metals selected from the group consisting of copper, cobalt, nickel, aluminum, iron, tin, gold, silver, chromium, molybdenum, tungsten, zinc, silicon, magnesium, titanium, vanadium, magnesium, germanium, zirconium, niobium, rhenium, iridium, cadmium, indium, hafnium, tantalum, platinum, neodymium, gallium, zinc, and oxides thereof.
a) the alloy comprises one or more metals selected from the group consisting of copper, cobalt, nickel, aluminum, iron, tin, gold, silver, chromium, molybdenum, tungsten, zinc, silicon, magnesium, titanium, vanadium, magnesium, germanium, zirconium, niobium, rhenium, iridium, cadmium, indium, hafnium, tantalum, platinum, neodymium, gallium, zinc, and oxides thereof.
41. The particulate material of Claim 12, wherein:
a) the alloy comprises one or more metals selected from the group consisting of copper, cobalt, nickel, aluminum, iron, tin, gold, silver, chromium, molybdenum, tungsten, zinc, silicon, magnesium, titanium, vanadium, magnesium, germanium, zirconium, niobium, rhenium, iridium, cadmium, indium, hafnium, tantalum, platinum, neodymium, gallium, zinc, and oxides thereof.
a) the alloy comprises one or more metals selected from the group consisting of copper, cobalt, nickel, aluminum, iron, tin, gold, silver, chromium, molybdenum, tungsten, zinc, silicon, magnesium, titanium, vanadium, magnesium, germanium, zirconium, niobium, rhenium, iridium, cadmium, indium, hafnium, tantalum, platinum, neodymium, gallium, zinc, and oxides thereof.
42. The particulate composition of Claim 21, wherein:
a) the alloy comprises one or more metals selected from the group consisting of copper, cobalt, nickel, aluminum, iron, tin, gold, silver, chromium, molybdenum, tungsten, zinc, silicon, magnesium, titanium, vanadium, magnesium, germanium, zirconium, niobium, rhenium, iridium, cadmium, indium, hafnium, tantalum, platinum, neodymium, gallium, zinc and oxides thereof.
a) the alloy comprises one or more metals selected from the group consisting of copper, cobalt, nickel, aluminum, iron, tin, gold, silver, chromium, molybdenum, tungsten, zinc, silicon, magnesium, titanium, vanadium, magnesium, germanium, zirconium, niobium, rhenium, iridium, cadmium, indium, hafnium, tantalum, platinum, neodymium, gallium, zinc and oxides thereof.
43. The particulate composition of Claim 31, wherein:
a) the alloy comprises one or more metals selected from the group consisting of copper, cobalt, nickel, aluminum, iron, tin, gold, silver, chromium, molybdenum, tungsten, zinc, silicon, magnesium, titanium, vanadium, magnesium, germanium, zirconium, niobium, rhenium, iridium, cadmium, indium, hafnium, tantalum, platinum, neodymium, gallium, zinc, and oxides thereof.
a) the alloy comprises one or more metals selected from the group consisting of copper, cobalt, nickel, aluminum, iron, tin, gold, silver, chromium, molybdenum, tungsten, zinc, silicon, magnesium, titanium, vanadium, magnesium, germanium, zirconium, niobium, rhenium, iridium, cadmium, indium, hafnium, tantalum, platinum, neodymium, gallium, zinc, and oxides thereof.
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US10/302,962 US7560160B2 (en) | 2002-11-25 | 2002-11-25 | Multifunctional particulate material, fluid, and composition |
PCT/US2003/016230 WO2004049358A2 (en) | 2002-11-25 | 2003-06-25 | Multifunctional particulate material, fluid, and composition |
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CA2473450A1 CA2473450A1 (en) | 2004-06-10 |
CA2473450C true CA2473450C (en) | 2010-10-05 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109456821A (en) * | 2018-09-27 | 2019-03-12 | 北京金洋润滑油有限公司 | A kind of fully synthetic bavin machine oil and preparation method thereof |
Families Citing this family (162)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7279832B2 (en) * | 2003-04-01 | 2007-10-09 | Innovalight, Inc. | Phosphor materials and illumination devices made therefrom |
US7081295B2 (en) * | 2003-08-18 | 2006-07-25 | Eastman Kodak Company | Method of manufacturing a polymethylmethacrylate core shell nanocomposite optical plastic article |
US7091271B2 (en) * | 2003-08-18 | 2006-08-15 | Eastman Kodak Company | Core shell nanocomposite optical plastic article |
US8679538B2 (en) | 2004-03-30 | 2014-03-25 | James Beckman | Ultra-violet radiation absorbing silicon particle nanoclusters |
US9402791B1 (en) | 2004-03-30 | 2016-08-02 | James Beckman | Ultra-violet radiation absorbing silicon particle nanoclusters |
JP4431085B2 (en) * | 2004-06-24 | 2010-03-10 | シャープ株式会社 | Conductive ink composition, reflecting member, circuit board, electronic device |
KR100485513B1 (en) * | 2004-06-24 | 2005-04-27 | 김호욱 | A manufacturing method of conductive electromagenetic wave absorptive powder |
US7750352B2 (en) * | 2004-08-10 | 2010-07-06 | Pinion Technologies, Inc. | Light strips for lighting and backlighting applications |
DE102004041649B4 (en) * | 2004-08-27 | 2006-10-12 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Magnetorheological elastomers and their use |
DE102004041650B4 (en) * | 2004-08-27 | 2006-10-19 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Magnetorheological materials with high switching factor and their use |
DE102004041651B4 (en) * | 2004-08-27 | 2006-10-19 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Magnetorheological materials with magnetic and non-magnetic inorganic additives and their use |
EP1632962A1 (en) * | 2004-09-07 | 2006-03-08 | C.R.F. Società Consortile per Azioni | Ferromagnetic particles for magnetorheological or electrorheological fluids, magnetorheological or electrorheological fluid including these particles, and manufacturing methods |
US9637682B2 (en) | 2004-11-11 | 2017-05-02 | Samsung Electronics Co., Ltd. | Interfused nanocrystals and method of preparing the same |
KR100722086B1 (en) | 2004-11-11 | 2007-05-25 | 삼성전자주식회사 | Interfused Nanocrystals and Method of Preparing Thereof |
US7261940B2 (en) | 2004-12-03 | 2007-08-28 | Los Alamos National Security, Llc | Multifunctional nanocrystals |
US20060142631A1 (en) * | 2004-12-29 | 2006-06-29 | Attila Meretei | Systems and methods for occluding a blood vessel |
US7491444B2 (en) | 2005-02-04 | 2009-02-17 | Oxane Materials, Inc. | Composition and method for making a proppant |
US7867613B2 (en) | 2005-02-04 | 2011-01-11 | Oxane Materials, Inc. | Composition and method for making a proppant |
US8012533B2 (en) * | 2005-02-04 | 2011-09-06 | Oxane Materials, Inc. | Composition and method for making a proppant |
EP2292894A1 (en) * | 2005-02-04 | 2011-03-09 | Oxane Materials, Inc. | A composition and method for making a proppant |
DE602006020710D1 (en) * | 2005-04-22 | 2011-04-28 | Fred Hutchinson Cancer Res Foundation | FLUORESCENT CHLOROTOXIN CONJUGATE AND METHOD FOR THE INTRAOPERATIVE VIEW OF CANCER |
GB2426010B (en) * | 2005-05-14 | 2011-04-06 | Jeffrey Boardman | semiconductor materials and methods of producing them |
TW200710570A (en) * | 2005-05-31 | 2007-03-16 | Taiyo Ink Mfg Co Ltd | Composition for forming adhesive pattern, multilayer structure obtained by using same, and method for producing such multilayer structure |
US8845927B2 (en) | 2006-06-02 | 2014-09-30 | Qd Vision, Inc. | Functionalized nanoparticles and method |
US9297092B2 (en) | 2005-06-05 | 2016-03-29 | Qd Vision, Inc. | Compositions, optical component, system including an optical component, devices, and other products |
CA2611455A1 (en) * | 2005-06-13 | 2006-12-28 | Michael H. Gurin | Nano-ionic liquids and methods of use |
DE102005034925B4 (en) * | 2005-07-26 | 2008-02-28 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Magnetorheological Elastomerkomposite and their use |
AU2006279590A1 (en) | 2005-08-12 | 2007-02-22 | Cambrios Technologies Corporation | Nanowires-based transparent conductors |
US8268405B2 (en) * | 2005-08-23 | 2012-09-18 | Uwm Research Foundation, Inc. | Controlled decoration of carbon nanotubes with aerosol nanoparticles |
US8240190B2 (en) * | 2005-08-23 | 2012-08-14 | Uwm Research Foundation, Inc. | Ambient-temperature gas sensor |
US20070269380A1 (en) * | 2005-10-11 | 2007-11-22 | Washington, University Of | Methotrexate-modified nanoparticles and related methods |
US9422160B1 (en) | 2005-10-28 | 2016-08-23 | Element One, Inc. | Method of making a hydrogen sensing pigment |
US8849087B2 (en) | 2006-03-07 | 2014-09-30 | Qd Vision, Inc. | Compositions, optical component, system including an optical component, devices, and other products |
US9212056B2 (en) | 2006-06-02 | 2015-12-15 | Qd Vision, Inc. | Nanoparticle including multi-functional ligand and method |
JP4585493B2 (en) * | 2006-08-07 | 2010-11-24 | 株式会社東芝 | Method for producing insulating magnetic material |
JP2008050416A (en) * | 2006-08-22 | 2008-03-06 | Denso Corp | Heat transport medium |
US20100055459A1 (en) * | 2006-08-30 | 2010-03-04 | Liquidia Technologies, Inc. | Nanoparticles Having Functional Additives for Self and Directed Assembly and Methods of Fabricating Same |
US7615385B2 (en) | 2006-09-20 | 2009-11-10 | Hypres, Inc | Double-masking technique for increasing fabrication yield in superconducting electronics |
TWI426531B (en) * | 2006-10-12 | 2014-02-11 | Cambrios Technologies Corp | Nanowire-based transparent conductors and applications thereof |
US8018568B2 (en) | 2006-10-12 | 2011-09-13 | Cambrios Technologies Corporation | Nanowire-based transparent conductors and applications thereof |
US7794512B2 (en) * | 2007-03-16 | 2010-09-14 | Afton Chemical Corporation | Supplying tungsten to a combustion system or combustion system exhaust stream containing iron |
US7758961B2 (en) * | 2007-03-22 | 2010-07-20 | Milliken & Company | Functionalized nanoparticles and their use in particle/bulk material systems |
CN100443616C (en) * | 2007-03-23 | 2008-12-17 | 中南大学 | Fast microwave crystallizing process for preparing nanometer crystalline iron-base soft magnetic alloy |
DE102007017589B3 (en) * | 2007-04-13 | 2008-10-02 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Damping device with field-controllable fluid |
EP2477229B1 (en) | 2007-04-20 | 2021-06-23 | Cambrios Film Solutions Corporation | Composite transparent conductors and methods of forming the same |
US7515808B2 (en) * | 2007-06-01 | 2009-04-07 | Alcatel-Lucent Usa Inc. | Thermally stabilized waveguides |
US8056652B2 (en) * | 2007-06-25 | 2011-11-15 | Smith International, Inc. | Barrier coated granules for improved hardfacing material using atomic layer deposition |
DE102007041433A1 (en) * | 2007-08-29 | 2009-03-05 | Siemens Ag | Method for measuring the thickness of a layer on a support |
US8092719B2 (en) * | 2007-09-04 | 2012-01-10 | Samsung Electronics Co., Ltd. | Nanocrystal-metal oxide composites and preparation method thereof |
JP2010541285A (en) * | 2007-10-02 | 2010-12-24 | パーカー.ハニフィン.コーポレイション | Nano ink for providing EMI shielding to windows |
WO2009070760A1 (en) * | 2007-11-26 | 2009-06-04 | Element One, Inc. | Hydrogen sulfide indicating pigments |
DE102008009751B4 (en) * | 2008-02-18 | 2012-12-06 | Von Ardenne Anlagentechnik Gmbh | Use of a lubricant under vacuum conditions |
US20090226376A1 (en) * | 2008-03-05 | 2009-09-10 | General Electric Company | Novel Mixed Ligand Core/Shell Iron Oxide Nanoparticles for Inflammation Imaging |
US20090280063A1 (en) * | 2008-05-09 | 2009-11-12 | General Electric Company | Novel pei-peg graft copolymer coating of iron oxide nanoparticles for inflammation imaging |
AU2009246142A1 (en) | 2008-05-15 | 2009-11-19 | Transmolecular, Inc. | Treatment of metastatic tumors |
US8130438B2 (en) * | 2008-07-03 | 2012-03-06 | Ajjer Llc | Metal coatings, conductive nanoparticles and applications of the same |
US8900704B1 (en) * | 2008-08-05 | 2014-12-02 | Lockheed Martin Corporation | Nanostructured metal-diamond composite thermal interface material (TIM) with improved thermal conductivity |
JP4465038B2 (en) * | 2008-08-20 | 2010-05-19 | 株式会社フォスメガ | Magnetic field sensor |
US9399075B2 (en) | 2008-12-29 | 2016-07-26 | General Electric Company | Nanoparticle contrast agents for diagnostic imaging |
US8728529B2 (en) * | 2008-12-29 | 2014-05-20 | General Electric Company | Nanoparticle contrast agents for diagnostic imaging |
US20100166664A1 (en) * | 2008-12-29 | 2010-07-01 | General Electric Company | Nanoparticle contrast agents for diagnostic imaging |
US8574549B2 (en) * | 2008-12-29 | 2013-11-05 | General Electric Company | Nanoparticle contrast agents for diagnostic imaging |
US8616323B1 (en) | 2009-03-11 | 2013-12-31 | Echogen Power Systems | Hybrid power systems |
US20100260686A1 (en) * | 2009-04-09 | 2010-10-14 | Washington, University Of | Nanoparticles for brain tumor imaging |
US20100279105A1 (en) * | 2009-04-15 | 2010-11-04 | Arizona Board Of Regents On Behalf Of The University Of Arizona | Coated Magnetic Particles, Composite Magnetic Materials and Magnetic Tapes Using Them |
US9014791B2 (en) | 2009-04-17 | 2015-04-21 | Echogen Power Systems, Llc | System and method for managing thermal issues in gas turbine engines |
US20100278734A1 (en) * | 2009-04-29 | 2010-11-04 | General Electric Company | Nanoparticle contrast agents for diagnostic imaging |
US20100278749A1 (en) * | 2009-04-29 | 2010-11-04 | General Electric Company | Nanoparticle contrast agents for diagnostic imaging |
US20100278748A1 (en) * | 2009-04-29 | 2010-11-04 | General Electric Company | Nanoparticle contrast agents for diagnostic imaging |
CA2766637A1 (en) | 2009-06-22 | 2010-12-29 | Echogen Power Systems Inc. | System and method for managing thermal issues in one or more industrial processes |
US9316404B2 (en) | 2009-08-04 | 2016-04-19 | Echogen Power Systems, Llc | Heat pump with integral solar collector |
US9572695B2 (en) | 2009-08-24 | 2017-02-21 | New Phase Ltd | Phase-change and shape-change materials |
US9115605B2 (en) | 2009-09-17 | 2015-08-25 | Echogen Power Systems, Llc | Thermal energy conversion device |
US8869531B2 (en) | 2009-09-17 | 2014-10-28 | Echogen Power Systems, Llc | Heat engines with cascade cycles |
US8813497B2 (en) | 2009-09-17 | 2014-08-26 | Echogen Power Systems, Llc | Automated mass management control |
US8613195B2 (en) | 2009-09-17 | 2013-12-24 | Echogen Power Systems, Llc | Heat engine and heat to electricity systems and methods with working fluid mass management control |
DE102009043370A1 (en) * | 2009-09-29 | 2011-04-07 | Forschungszentrum Jülich GmbH | Component with magnetically observable protective layer and method for operating a component |
US7947125B1 (en) * | 2009-10-30 | 2011-05-24 | Canon Kabushiki Kaisha | Fine particle dispersion liquid containing tantalum oxide fine particles, tantalum oxide fine particle-resin composite, and method of producing fine particle dispersion liquid |
US9205155B2 (en) * | 2009-10-30 | 2015-12-08 | General Electric Company | Treating water insoluble nanoparticles with hydrophilic alpha-hydroxyphosphonic acid conjugates, the so modified nanoparticles and their use as contrast agents |
BR112012015322A2 (en) | 2009-12-22 | 2019-09-24 | Oxane Mat Inc | proppant and method for forming the proppant |
US9018347B2 (en) | 2010-02-04 | 2015-04-28 | Morphotek, Inc. | Chlorotoxin polypeptides and conjugates and uses thereof |
CN102834472B (en) * | 2010-02-05 | 2015-04-22 | 凯博瑞奥斯技术公司 | Photosensitive ink compositions and transparent conductors and method of using the same |
KR101972173B1 (en) | 2010-05-11 | 2019-04-24 | 프레드 헛친슨 켄서 리서치 센터 | Chlorotoxin variants, conjugates, and methods for their use |
WO2012051258A2 (en) * | 2010-10-12 | 2012-04-19 | Yin Yadong | Magnetic assembly of nonmagnetic particles into photonic crystal structures |
KR101223485B1 (en) * | 2010-11-12 | 2013-01-17 | 한국과학기술연구원 | Multifuctional thermal spreading particles and array thereof, and the fabrication method thereof |
US8857186B2 (en) | 2010-11-29 | 2014-10-14 | Echogen Power Systems, L.L.C. | Heat engine cycles for high ambient conditions |
US8616001B2 (en) | 2010-11-29 | 2013-12-31 | Echogen Power Systems, Llc | Driven starter pump and start sequence |
US8783034B2 (en) | 2011-11-07 | 2014-07-22 | Echogen Power Systems, Llc | Hot day cycle |
US20130242368A1 (en) * | 2010-12-09 | 2013-09-19 | Kilolambda Technologies Ltd. | Fast response photochromic composition and device |
CN102140249B (en) * | 2010-12-23 | 2013-04-03 | 华东理工大学 | Method for quickly preparing silver/polypyrrole composite sol by adopting microwave method |
CN102135692B (en) * | 2010-12-31 | 2013-08-07 | 泉州红瑞兴纺织有限公司 | Polymer electrochromic fabric and preparation method thereof |
US9004164B2 (en) | 2011-04-25 | 2015-04-14 | Conocophillips Company | In situ radio frequency catalytic upgrading |
TW201247225A (en) * | 2011-05-17 | 2012-12-01 | Univ Nat Chiao Tung | Drug carrier with thermal sensitivity, manufacturing method thereof, and use of the same as NMR contrast agent |
CN102303114B (en) * | 2011-05-30 | 2013-06-26 | 深圳市格林美高新技术股份有限公司 | Cladding cobalt powder and preparation method thereof |
CN102816525B (en) * | 2011-06-10 | 2015-05-13 | 王耀先 | Heat-conductive coating |
US8905376B2 (en) | 2011-07-18 | 2014-12-09 | Dennis W. Gilstad | Tunable check valve |
US8944409B2 (en) * | 2011-07-18 | 2015-02-03 | Dennis W. Gilstad | Tunable fluid end |
US8827244B2 (en) * | 2011-07-18 | 2014-09-09 | Dennis W. Gilstad | Tunable fluid end |
US9027636B2 (en) | 2011-07-18 | 2015-05-12 | Dennis W. Gilstad | Tunable down-hole stimulation system |
US9080690B2 (en) | 2011-07-18 | 2015-07-14 | Dennis W. Gilstad | Tunable check valve |
US8939200B1 (en) | 2011-07-18 | 2015-01-27 | Dennis W. Gilstad | Tunable hydraulic stimulator |
US20130197119A1 (en) * | 2011-08-04 | 2013-08-01 | Vaupell Holdings, Inc. | Microcellular foam molding of aircraft interior components |
US10739337B2 (en) * | 2011-08-30 | 2020-08-11 | Board Of Trustees Of Michigan State University | Extraction and detection of pathogens using carbohydrate-functionalized biosensors |
CN102408562B (en) * | 2011-09-23 | 2013-04-03 | 西南交通大学 | Preparation method for polyaniline/ferroferric oxide compound with nucleus-shell structure |
WO2013055391A1 (en) | 2011-10-03 | 2013-04-18 | Echogen Power Systems, Llc | Carbon dioxide refrigeration cycle |
US9283619B2 (en) * | 2011-11-03 | 2016-03-15 | Baker Hughes Incorporated | Polarizable nanoparticles comprising coated metal nanoparticles and electrorheological fluid comprising same |
CN102731781B (en) * | 2012-06-11 | 2014-01-01 | 东南大学 | Method for preparing polypyrrole-zinc oxide nano-grade composite material |
CN104520099A (en) * | 2012-08-16 | 2015-04-15 | 英派尔科技开发有限公司 | Power transmission |
US9091278B2 (en) | 2012-08-20 | 2015-07-28 | Echogen Power Systems, Llc | Supercritical working fluid circuit with a turbo pump and a start pump in series configuration |
US9341084B2 (en) | 2012-10-12 | 2016-05-17 | Echogen Power Systems, Llc | Supercritical carbon dioxide power cycle for waste heat recovery |
US9118226B2 (en) | 2012-10-12 | 2015-08-25 | Echogen Power Systems, Llc | Heat engine system with a supercritical working fluid and processes thereof |
US20140179560A1 (en) | 2012-12-10 | 2014-06-26 | Fred Hutchinson Cancer Research Center | Drug discovery methods and platforms |
AU2014209091B2 (en) | 2013-01-28 | 2018-03-15 | Brett A. BOWAN | Process for controlling a power turbine throttle valve during a supercritical carbon dioxide rankine cycle |
US9638065B2 (en) | 2013-01-28 | 2017-05-02 | Echogen Power Systems, Llc | Methods for reducing wear on components of a heat engine system at startup |
WO2014138035A1 (en) | 2013-03-04 | 2014-09-12 | Echogen Power Systems, L.L.C. | Heat engine systems with high net power supercritical carbon dioxide circuits |
US9784730B2 (en) | 2013-03-21 | 2017-10-10 | University Of Washington Through Its Center For Commercialization | Nanoparticle for targeting brain tumors and delivery of O6-benzylguanine |
KR20140121590A (en) * | 2013-04-08 | 2014-10-16 | 재단법인대구경북과학기술원 | Mobile bio-scaffold controlled by magnetic field and manufacturing method thereof |
CN104124031B (en) * | 2013-04-28 | 2017-02-08 | 中国科学院理化技术研究所 | Magnetic nanometer-sized metal fluid and preparation method thereof |
WO2015031831A1 (en) * | 2013-08-29 | 2015-03-05 | Konica Minolta Laboratory U.S.A., Inc. | Fabricating highly durable nanostructured coatings on polymer substrate |
US11559580B1 (en) | 2013-09-17 | 2023-01-24 | Blaze Bioscience, Inc. | Tissue-homing peptide conjugates and methods of use thereof |
CN103468348B (en) * | 2013-09-29 | 2015-08-19 | 陕西师范大学 | Spherical aluminum powder/polyaniline nuclear-shell structure composite electrorheological fluid |
CN103606429B (en) * | 2013-10-17 | 2016-02-24 | 南昌大学 | A kind of nano chromium carbide ferrofluid and preparation method thereof |
CN103606428B (en) * | 2013-10-17 | 2016-01-20 | 南昌大学 | A kind of nano vanadium carbide ferrofluid and preparation method thereof |
CN103632798B (en) * | 2013-12-03 | 2016-02-24 | 东华理工大学 | A kind of preparation method of poly-3 methyl thiophene clad nano nickel-zinc ferrite particle magnetic liquid |
CN103964746B (en) * | 2014-05-06 | 2015-08-12 | 南京信息工程大学 | A kind of magneticdamping matrix material and preparation method thereof |
WO2016065218A1 (en) | 2014-10-23 | 2016-04-28 | Corning Incorporated | Polymer-encapsulated magnetic nanoparticles |
CN104399967A (en) * | 2014-10-30 | 2015-03-11 | 苏州莱特复合材料有限公司 | Copper base powder metallurgy friction reducing material and preparing method of copper base powder metallurgy friction reducing material |
US10570777B2 (en) | 2014-11-03 | 2020-02-25 | Echogen Power Systems, Llc | Active thrust management of a turbopump within a supercritical working fluid circuit in a heat engine system |
EP3226819B1 (en) | 2014-11-25 | 2018-10-24 | New Phase Ltd. | Phase-change nanoparticle |
CN104690609A (en) * | 2014-12-05 | 2015-06-10 | 贵州西南工具(集团)有限公司 | Magnetic grinding liquid for magnetic passivation of cutting edge of cutter and preparation method of magnetic grinding liquid |
US9169707B1 (en) | 2015-01-22 | 2015-10-27 | Dennis W. Gilstad | Tunable down-hole stimulation array |
CN104689907B (en) * | 2015-02-13 | 2017-10-24 | 中南大学 | Magnetic matrix, magnetic matrix box, magnetic matrix post and its application for magnetic separator |
CN105154183A (en) * | 2015-08-28 | 2015-12-16 | 苏州莱特复合材料有限公司 | Method for preparing powder metallurgy lubricants |
CN108085519B (en) * | 2016-11-21 | 2019-12-24 | 云南科威液态金属谷研发有限公司 | Method for doping micro-nano particles into liquid metal and application thereof |
DE102016226262A1 (en) | 2016-12-28 | 2018-06-28 | Robert Bosch Gmbh | Electronic module, method |
EP3582913A4 (en) | 2017-02-14 | 2020-12-16 | Dragonfly Energy Corp. | Preparation and powder film deposition of pre-coated powders |
CN108863371A (en) * | 2017-05-15 | 2018-11-23 | 山东大学 | Al2O3The adaptive texture gradient sintex of/TiC/VN and its preparation process |
CN109385084A (en) * | 2017-08-10 | 2019-02-26 | 沙冰娟 | A kind of polyaniline-zinc ferrite conductive material and preparation method thereof |
FR3071844A1 (en) * | 2017-10-03 | 2019-04-05 | Chromalys | EMBOLIZATION PARTICLE COMPRISING NANO PARTICLES |
JP7216083B2 (en) * | 2017-10-11 | 2023-01-31 | ウエスチングハウス・エレクトリック・カンパニー・エルエルシー | Nuclear reactivity distribution control element using magneto-rheological properties |
CN107880590B (en) * | 2017-10-27 | 2020-11-10 | 北京理工大学 | Silicon dioxide coated zirconium diboride-silicon carbide composite powder |
CN107879744B (en) * | 2017-12-07 | 2020-07-24 | 武汉科技大学 | Primary electromagnetic field SiC-ZnO composite material and preparation method thereof |
US10356950B2 (en) * | 2017-12-18 | 2019-07-16 | Ge Aviation Systems, Llc | Avionics heat exchanger |
CN108330388A (en) * | 2018-01-29 | 2018-07-27 | 武汉理工大学 | A kind of 20CrMnTi bases are to lubricate the self-lubricating material and preparation method thereof of phase with tin silver copper |
CN108192250B (en) * | 2018-02-09 | 2020-07-31 | 怀化学院 | Luminous polyvinyl alcohol material and preparation method thereof |
CN108822542B (en) * | 2018-06-12 | 2020-07-21 | 宝鸡文理学院 | Preparation method of conductive polymer composite material |
CN108659918B (en) * | 2018-06-25 | 2021-10-01 | 河南科技大学 | Gear oil additive, gear lubricating oil, and preparation method and application thereof |
US10883388B2 (en) | 2018-06-27 | 2021-01-05 | Echogen Power Systems Llc | Systems and methods for generating electricity via a pumped thermal energy storage system |
JP7061406B2 (en) * | 2018-07-19 | 2022-04-28 | 中山大学 | Electrorheological fluid |
CN109536239A (en) * | 2018-12-19 | 2019-03-29 | 中英海底系统有限公司 | A kind of Nanometer-sized Neodymium Oxide lube oil additive and preparation method thereof |
KR102091969B1 (en) * | 2019-03-29 | 2020-03-23 | 오현철 | Conductive paint composition |
KR20220008845A (en) * | 2019-05-15 | 2022-01-21 | 쓰리엠 이노베이티브 프로퍼티즈 컴파니 | Orientation of magnetic fillers to optimize film properties |
US11414555B2 (en) * | 2019-08-05 | 2022-08-16 | The Boeing Company | Systems, compositions, and methods for enhanced electromagnetic shielding and corrosion resistance |
US11739402B2 (en) * | 2019-11-19 | 2023-08-29 | The University Of Akron | Magnetic particles or wires for electrical machinery |
US11435120B2 (en) | 2020-05-05 | 2022-09-06 | Echogen Power Systems (Delaware), Inc. | Split expansion heat pump cycle |
CN111482177A (en) * | 2020-05-07 | 2020-08-04 | 江苏新河农用化工有限公司 | Catalyst for preparing hydrogenated terphenyl and preparation method and application thereof |
CN111560282A (en) * | 2020-05-08 | 2020-08-21 | 安徽中天石化股份有限公司 | Wear-resistant vehicle lubricating oil and preparation method thereof |
CN112063163B (en) * | 2020-08-25 | 2022-09-16 | 广州大学 | Antistatic heat-conducting flame-retardant composite material and preparation method thereof |
CN112299717B (en) * | 2020-12-02 | 2022-06-24 | 禹州市华艺钧瓷文化传媒有限公司 | Photochromic jun porcelain glaze |
AU2021397292A1 (en) | 2020-12-09 | 2023-07-06 | Supercritical Storage Company, Inc. | Three reservoir electric thermal energy storage system |
CN113321247B (en) * | 2021-06-16 | 2022-08-02 | 哈尔滨工业大学 | Preparation method of ordered pore wood derived carbon-loaded nickel cobaltate wave-absorbing material |
CN113782346B (en) * | 2021-09-09 | 2022-06-14 | 福州大学 | Poly 3, 4-ethylenedioxythiophene/nickel cobaltate/carbon cloth flexible electrode |
Family Cites Families (136)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3047507A (en) * | 1960-04-04 | 1962-07-31 | Wefco Inc | Field responsive force transmitting compositions |
US3127528A (en) * | 1960-10-03 | 1964-03-31 | United Aircraft Corp | Magnetohydrodynamic generator |
US3287677A (en) | 1964-05-25 | 1966-11-22 | Westinghouse Electric Corp | High frequency transformer core comprised of magnetic fluid |
US3488531A (en) * | 1965-09-15 | 1970-01-06 | Avco Corp | Means for and method of moving objects by ferrohydrodynamics |
AU435693B2 (en) * | 1967-04-20 | 1973-05-14 | Ion-exchange adsorbents and process involving same | |
US3767783A (en) * | 1970-12-23 | 1973-10-23 | Us Interior | Self destructing pesticidal formulations and methods for their use |
US3859789A (en) | 1972-01-31 | 1975-01-14 | Battelle Development Corp | Method and apparatus for converting one form of energy into another form of energy |
US3937839A (en) * | 1974-02-28 | 1976-02-10 | American Home Products Corporation | Method for attenuating bleeding |
US4303636A (en) | 1974-08-20 | 1981-12-01 | Gordon Robert T | Cancer treatment |
US4106488A (en) * | 1974-08-20 | 1978-08-15 | Robert Thomas Gordon | Cancer treatment method |
US4107288A (en) * | 1974-09-18 | 1978-08-15 | Pharmaceutical Society Of Victoria | Injectable compositions, nanoparticles useful therein, and process of manufacturing same |
US4064409A (en) | 1976-07-28 | 1977-12-20 | Redman Charles M | Ferrofluidic electrical generator |
US4183156A (en) * | 1977-01-14 | 1980-01-15 | Robert C. Bogert | Insole construction for articles of footwear |
DE2738253A1 (en) * | 1977-08-25 | 1979-03-01 | Dabisch Tipp Ex Tech | BODY WITH REVERSIBLE TEMPERATURE-DEPENDENT TRANSPARENCY |
US4267234A (en) * | 1978-03-17 | 1981-05-12 | California Institute Of Technology | Polyglutaraldehyde synthesis and protein bonding substrates |
US4340626A (en) * | 1978-05-05 | 1982-07-20 | Rudy Marion F | Diffusion pumping apparatus self-inflating device |
US4219945B1 (en) * | 1978-06-26 | 1993-10-19 | Robert C. Bogert | Footwear |
US4364377A (en) | 1979-02-02 | 1982-12-21 | Walker Scientific, Inc. | Magnetic field hemostasis |
US4321020A (en) * | 1979-12-17 | 1982-03-23 | Sperry Corporation | Fluid pump |
US4323056A (en) * | 1980-05-19 | 1982-04-06 | Corning Glass Works | Radio frequency induced hyperthermia for tumor therapy |
US4342157A (en) * | 1980-08-11 | 1982-08-03 | Sam Gilbert | Shock absorbing partially liquid-filled cushion for shoes |
WO1983001738A1 (en) * | 1981-11-12 | 1983-05-26 | SCHRÖDER, Ulf | Intravascularly administrable, magnetically responsive nanosphere or manoparticle, a process for the production thereof, and the use thereof |
US4574782A (en) * | 1981-11-16 | 1986-03-11 | Corning Glass Works | Radio frequency-induced hyperthermia for tumor therapy |
US4454234A (en) * | 1981-12-30 | 1984-06-12 | Czerlinski George H | Coated magnetizable microparticles, reversible suspensions thereof, and processes relating thereto |
US4452773A (en) * | 1982-04-05 | 1984-06-05 | Canadian Patents And Development Limited | Magnetic iron-dextran microspheres |
US4613304A (en) | 1982-10-21 | 1986-09-23 | Meyer Stanley A | Gas electrical hydrogen generator |
US4443430A (en) * | 1982-11-16 | 1984-04-17 | Ethicon, Inc. | Synthetic absorbable hemostatic agent |
US4472890A (en) | 1983-03-08 | 1984-09-25 | Fivel | Shoe incorporating shock absorbing partially liquid-filled cushions |
US4545368A (en) | 1983-04-13 | 1985-10-08 | Rand Robert W | Induction heating method for use in causing necrosis of neoplasm |
US4554088A (en) | 1983-05-12 | 1985-11-19 | Advanced Magnetics Inc. | Magnetic particles for use in separations |
US4695392A (en) | 1983-05-12 | 1987-09-22 | Advanced Magnetics Inc. | Magnetic particles for use in separations |
US4628037A (en) | 1983-05-12 | 1986-12-09 | Advanced Magnetics, Inc. | Binding assays employing magnetic particles |
US4695393A (en) | 1983-05-12 | 1987-09-22 | Advanced Magnetics Inc. | Magnetic particles for use in separations |
US4672040A (en) * | 1983-05-12 | 1987-06-09 | Advanced Magnetics, Inc. | Magnetic particles for use in separations |
US4721618A (en) * | 1983-06-27 | 1988-01-26 | Queen's University At Kingston | Method for controlling bleeding |
CA1225585A (en) * | 1983-06-30 | 1987-08-18 | Maria T. Litvinova | Composition for embolization of blood vessels |
US4662359A (en) * | 1983-08-12 | 1987-05-05 | Robert T. Gordon | Use of magnetic susceptibility probes in the treatment of cancer |
US4637394A (en) * | 1985-06-11 | 1987-01-20 | Racz Gabor B | Constant pressure tourniquet |
US5597531A (en) * | 1985-10-04 | 1997-01-28 | Immunivest Corporation | Resuspendable coated magnetic particles and stable magnetic particle suspensions |
US5180583A (en) * | 1985-11-26 | 1993-01-19 | Hedner Ulla K E | Method for the treatment of bleeding disorders |
US4770183A (en) | 1986-07-03 | 1988-09-13 | Advanced Magnetics Incorporated | Biologically degradable superparamagnetic particles for use as nuclear magnetic resonance imaging agents |
US5069216A (en) | 1986-07-03 | 1991-12-03 | Advanced Magnetics Inc. | Silanized biodegradable super paramagnetic metal oxides as contrast agents for imaging the gastrointestinal tract |
US4951675A (en) * | 1986-07-03 | 1990-08-28 | Advanced Magnetics, Incorporated | Biodegradable superparamagnetic metal oxides as contrast agents for MR imaging |
US6013531A (en) * | 1987-10-26 | 2000-01-11 | Dade International Inc. | Method to use fluorescent magnetic polymer particles as markers in an immunoassay |
US4834898A (en) * | 1988-03-14 | 1989-05-30 | Board Of Control Of Michigan Technological University | Reagents for magnetizing nonmagnetic materials |
US4992190A (en) * | 1989-09-22 | 1991-02-12 | Trw Inc. | Fluid responsive to a magnetic field |
US5374246A (en) | 1989-11-07 | 1994-12-20 | Ray; Joel W. | Method and device for delivering a hemostatic agent to an operating status |
FR2656319B1 (en) * | 1989-12-27 | 1992-03-20 | Rhone Poulenc Chimie | MAGNETISABLE COMPOSITE MICROSPHERES BASED ON A CROSSLINKED ORGANOSILICY POLYMER, THEIR PREPARATION PROCESS AND THEIR APPLICATION IN BIOLOGY. |
US5067952A (en) | 1990-04-02 | 1991-11-26 | Gudov Vasily F | Method and apparatus for treating malignant tumors by local hyperpyrexia |
US5595735A (en) * | 1990-05-23 | 1997-01-21 | Johnson & Johnson Medical, Inc. | Hemostatic thrombin paste composition |
US5236410A (en) * | 1990-08-02 | 1993-08-17 | Ferrotherm International, Inc. | Tumor treatment method |
EP0470569B1 (en) * | 1990-08-08 | 1995-11-22 | Takeda Chemical Industries, Ltd. | Intravascular embolizing agent containing angiogenesis inhibiting substance |
US5466609A (en) | 1990-10-31 | 1995-11-14 | Coulter Corporation | Biodegradable gelatin-aminodextran particle coatings of and processes for making same |
US5108359A (en) * | 1990-12-17 | 1992-04-28 | Ferrotherm International, Inc. | Hemangioma treatment method |
US6391343B1 (en) * | 1991-01-15 | 2002-05-21 | Hemosphere, Inc. | Fibrinogen-coated particles for therapeutic use |
US5161776A (en) | 1991-02-11 | 1992-11-10 | Nicholson Robert D | High speed electric valve |
US5155927A (en) * | 1991-02-20 | 1992-10-20 | Asics Corporation | Shoe comprising liquid cushioning element |
DE4117782C2 (en) * | 1991-05-28 | 1997-07-17 | Diagnostikforschung Inst | Nanocrystalline magnetic iron oxide particles, processes for their production and diagnostic and / or therapeutic agents |
FR2676927B1 (en) * | 1991-05-29 | 1995-06-23 | Ibf | MICROSPHERES FOR USE IN THERAPEUTIC VASCULAR OCCLUSIONS AND INJECTABLE SOLUTIONS CONTAINING THEM. |
US5079786A (en) * | 1991-07-12 | 1992-01-14 | Rojas Adrian Q | Cushion with magnetic spheres in a viscous fluid |
US5207675A (en) * | 1991-07-15 | 1993-05-04 | Jerome Canady | Surgical coagulation device |
JP3356447B2 (en) * | 1991-10-16 | 2002-12-16 | テルモ株式会社 | Vascular lesion embolic material composed of dried polymer gel |
US5965194A (en) * | 1992-01-10 | 1999-10-12 | Imation Corp. | Magnetic recording media prepared from magnetic particles having an extremely thin, continuous, amorphous, aluminum hydrous oxide coating |
US6036955A (en) * | 1992-03-05 | 2000-03-14 | The Scripps Research Institute | Kits and methods for the specific coagulation of vasculature |
EP0636273B1 (en) * | 1992-04-14 | 1997-08-20 | Byelocorp Scientific, Inc. | Magnetorheological fluids and methods of making thereof |
CA2134071C (en) * | 1992-04-23 | 1999-04-27 | Sew Wah Tay | Apparatus and method for sealing vascular punctures |
US5567564A (en) | 1992-07-09 | 1996-10-22 | Xerox Corporation | Liquid development composition having a colorant comprising a stable dispersion of magnetic particles in an aqueous medium |
US5358659A (en) | 1992-07-09 | 1994-10-25 | Xerox Corporation | Magnetic materials with single-domain and multidomain crystallites and a method of preparation |
US5702630A (en) | 1992-07-16 | 1997-12-30 | Nippon Oil Company, Ltd. | Fluid having both magnetic and electrorheological characteristics |
US5354488A (en) | 1992-10-07 | 1994-10-11 | Trw Inc. | Fluid responsive to a magnetic field |
RU2106710C1 (en) * | 1992-10-30 | 1998-03-10 | Лорд Корпорейшн | Magnetorheological material |
US5582425A (en) | 1993-02-08 | 1996-12-10 | Autoliv Development Ab | Gas supply device for an air-bag |
US5885486A (en) * | 1993-03-05 | 1999-03-23 | Pharmaciaand Upjohn Ab | Solid lipid particles, particles of bioactive agents and methods for the manufacture and use thereof |
DE4325071C2 (en) * | 1993-07-19 | 1995-08-10 | Lancaster Group Ag | Preparation for circulation promotion |
US5348050A (en) | 1993-07-19 | 1994-09-20 | Ashton Thomas E | Magnetic fluid treatment device |
US5565215A (en) | 1993-07-23 | 1996-10-15 | Massachusettes Institute Of Technology | Biodegradable injectable particles for imaging |
US5673721A (en) | 1993-10-12 | 1997-10-07 | Alcocer; Charles F. | Electromagnetic fluid conditioning apparatus and method |
US5646185A (en) * | 1993-10-14 | 1997-07-08 | The Board Of Trustees Of The Leland Stanford Junior University | Tumor treatment method |
EP0726749B1 (en) * | 1993-11-03 | 2004-08-11 | Clarion Pharmaceuticals, Inc. | Hemostatic patch |
US5928958A (en) * | 1994-07-27 | 1999-07-27 | Pilgrimm; Herbert | Superparamagnetic particles, process for their manufacture and usage |
US5549837A (en) * | 1994-08-31 | 1996-08-27 | Ford Motor Company | Magnetic fluid-based magnetorheological fluids |
US6266897B1 (en) * | 1994-10-21 | 2001-07-31 | Adidas International B.V. | Ground-contacting systems having 3D deformation elements for use in footwear |
US5714829A (en) * | 1995-01-10 | 1998-02-03 | Guruprasad; Venkata | Electromagnetic heat engines and method for cooling a system having predictable bursts of heat dissipation |
US5635162A (en) * | 1995-02-23 | 1997-06-03 | Ultradent Products, Inc. | Hemostatic composition for treating gingival area |
US5650681A (en) * | 1995-03-20 | 1997-07-22 | Delerno; Charles Chaille | Electric current generation apparatus |
US5782954A (en) * | 1995-06-07 | 1998-07-21 | Hoeganaes Corporation | Iron-based metallurgical compositions containing flow agents and methods for using same |
US5958794A (en) | 1995-09-22 | 1999-09-28 | Minnesota Mining And Manufacturing Company | Method of modifying an exposed surface of a semiconductor wafer |
US5900184A (en) * | 1995-10-18 | 1999-05-04 | Lord Corporation | Method and magnetorheological fluid formulations for increasing the output of a magnetorheological fluid device |
US6189538B1 (en) * | 1995-11-20 | 2001-02-20 | Patricia E. Thorpe | Tourniquet and method of using |
US5800372A (en) | 1996-01-09 | 1998-09-01 | Aerojet-General Corporation | Field dressing for control of exsanguination |
US5702361A (en) * | 1996-01-31 | 1997-12-30 | Micro Therapeutics, Inc. | Method for embolizing blood vessels |
US5813142A (en) | 1996-02-09 | 1998-09-29 | Demon; Ronald S. | Shoe sole with an adjustable support pattern |
US5667715A (en) | 1996-04-08 | 1997-09-16 | General Motors Corporation | Magnetorheological fluids |
DE29607363U1 (en) * | 1996-04-23 | 1996-08-22 | Buerkert Werke Gmbh & Co | Valve through which gas flows |
US5695480A (en) | 1996-07-29 | 1997-12-09 | Micro Therapeutics, Inc. | Embolizing compositions |
JP2001504753A (en) * | 1996-11-04 | 2001-04-10 | マテリアルズ モディフィケーション,インコーポレイティド | Microwave plasma chemical synthesis of ultrafine powder |
US5707078A (en) * | 1996-11-26 | 1998-01-13 | Takata, Inc. | Air bag module with adjustable cushion inflation |
US6036226A (en) * | 1997-02-03 | 2000-03-14 | General Dynamics Armament Systems, Inc. | Inflator capable of modulation air bag inflation rate in a vehicle occupant restraint apparatus |
US6039347A (en) * | 1997-02-03 | 2000-03-21 | General Dynamics Armament Systems, Inc. | Liquid propellant airbag inflator with dual telescoping pistons |
US5993358A (en) | 1997-03-05 | 1999-11-30 | Lord Corporation | Controllable platform suspension system for treadmill decks and the like and devices therefor |
US6076852A (en) * | 1997-08-05 | 2000-06-20 | Trw Vehicle Safety Systems Inc. | Inflatable restraint inflator with flow control valve |
US6083680A (en) * | 1997-08-14 | 2000-07-04 | Fuji Photo Film Co., Ltd. | Photothermographic material |
JPH11107907A (en) * | 1997-10-04 | 1999-04-20 | Yoshiro Nakamatsu | Convection energy apparatus |
AUPP008197A0 (en) | 1997-10-29 | 1997-11-20 | Paragon Medical Limited | Improved targeted hysteresis hyperthermia as a method for treating diseased tissue |
US5927753A (en) * | 1997-12-15 | 1999-07-27 | Trw Vehicle Safety Systems Inc. | Vehicle occupant protection apparatus |
US5947514A (en) | 1998-02-20 | 1999-09-07 | Breed Automotive Technology, Inc. | Valve controlled automotive pyrotechnic systems |
US6096021A (en) * | 1998-03-30 | 2000-08-01 | The University Of Virginia Patent Foundation | Flow arrest, double balloon technique for occluding aneurysms or blood vessels |
DE19816208B4 (en) * | 1998-04-09 | 2009-04-23 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | control valve |
CA2328249A1 (en) * | 1998-04-15 | 1999-10-21 | Bart C. Weimer | Real time detection of antigens |
JP3907837B2 (en) * | 1998-06-12 | 2007-04-18 | 富士フイルム株式会社 | Image recording material |
US6051607A (en) * | 1998-07-02 | 2000-04-18 | Micro Therapeutics, Inc. | Vascular embolizing compositions comprising ethyl lactate and methods for their use |
US6149832A (en) | 1998-10-26 | 2000-11-21 | General Motors Corporation | Stabilized magnetorheological fluid compositions |
US6666991B1 (en) * | 1998-11-27 | 2003-12-23 | Nittetsu Mining Co., Ltd. | Fluorescent or phosphorescent composition |
US6312484B1 (en) * | 1998-12-22 | 2001-11-06 | 3M Innovative Properties Company | Nonwoven abrasive articles and method of preparing same |
US6296604B1 (en) * | 1999-03-17 | 2001-10-02 | Stereotaxis, Inc. | Methods of and compositions for treating vascular defects |
JP2001247010A (en) * | 1999-12-28 | 2001-09-11 | Takata Corp | Occupant protective device |
US6358196B1 (en) * | 1999-12-29 | 2002-03-19 | Reiza Rayman | Magnetic retraction system for laparoscopic surgery and method of use thereof |
US6475710B2 (en) * | 2000-01-20 | 2002-11-05 | Konica Corporation | Photothermographic material |
US6530944B2 (en) * | 2000-02-08 | 2003-03-11 | Rice University | Optically-active nanoparticles for use in therapeutic and diagnostic methods |
AU2001241642A1 (en) * | 2000-02-18 | 2001-08-27 | The Board Of Regents Of The University And Community College System Of Nevada | Magnetorheological polymer gels |
US6548264B1 (en) * | 2000-05-17 | 2003-04-15 | University Of Florida | Coated nanoparticles |
US6355275B1 (en) * | 2000-06-23 | 2002-03-12 | Carbon Medical Technologies, Inc. | Embolization using carbon coated microparticles |
FR2811571B1 (en) * | 2000-07-11 | 2002-10-11 | Flamel Tech Sa | ORAL PHARMACEUTICAL COMPOSITION FOR CONTROLLED RELEASE AND SUSTAINED ABSORPTION OF AN ACTIVE INGREDIENT |
US20020060321A1 (en) * | 2000-07-14 | 2002-05-23 | Kazlas Peter T. | Minimally- patterned, thin-film semiconductor devices for display applications |
US6582429B2 (en) * | 2001-07-10 | 2003-06-24 | Cardiac Pacemakers, Inc. | Ablation catheter with covered electrodes allowing electrical conduction therethrough |
US6557272B2 (en) * | 2001-07-13 | 2003-05-06 | Luigi Alessio Pavone | Helium movement magnetic mechanism adjustable socket sole |
US6734574B2 (en) * | 2002-02-13 | 2004-05-11 | Ernest Eun Ho Shin | Buoyancy-driven electric power generator |
US6768230B2 (en) * | 2002-02-19 | 2004-07-27 | Rockwell Scientific Licensing, Llc | Multiple magnet transducer |
US7249604B1 (en) * | 2002-05-10 | 2007-07-31 | Vasmo, Inc. | Medical devices for occlusion of blood flow |
US7288075B2 (en) * | 2002-06-27 | 2007-10-30 | Ethicon, Inc. | Methods and devices utilizing rheological materials |
DE10333703B4 (en) * | 2002-07-24 | 2007-04-26 | Völkl Tennis GmbH | Ball game racket |
DE10240530A1 (en) * | 2002-09-03 | 2004-03-11 | Völkl Tennis GmbH | Shoe, in particular, a sports shoe comprises a sole with additional middle and top zones accommodating respectively force sensors and active damping devices |
US6871871B2 (en) * | 2002-09-13 | 2005-03-29 | Island Pyrochemical Industries Corp. | Air bag inflator |
US7007972B1 (en) * | 2003-03-10 | 2006-03-07 | Materials Modification, Inc. | Method and airbag inflation apparatus employing magnetic fluid |
US6982501B1 (en) * | 2003-05-19 | 2006-01-03 | Materials Modification, Inc. | Magnetic fluid power generator device and method for generating power |
US7200956B1 (en) * | 2003-07-23 | 2007-04-10 | Materials Modification, Inc. | Magnetic fluid cushioning device for a footwear or shoe |
-
2002
- 2002-11-25 US US10/302,962 patent/US7560160B2/en not_active Expired - Lifetime
-
2003
- 2003-06-25 AU AU2003259026A patent/AU2003259026B9/en not_active Ceased
- 2003-06-25 CA CA2473450A patent/CA2473450C/en not_active Expired - Fee Related
- 2003-06-25 WO PCT/US2003/016230 patent/WO2004049358A2/en active IP Right Grant
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN109456821A (en) * | 2018-09-27 | 2019-03-12 | 北京金洋润滑油有限公司 | A kind of fully synthetic bavin machine oil and preparation method thereof |
CN109456821B (en) * | 2018-09-27 | 2021-10-26 | 北京金洋润滑油有限公司 | Fully synthetic diesel engine oil and preparation method thereof |
Also Published As
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WO2004049358A2 (en) | 2004-06-10 |
WO2004049358A3 (en) | 2005-03-17 |
US20040105980A1 (en) | 2004-06-03 |
AU2003259026B2 (en) | 2007-06-07 |
US7560160B2 (en) | 2009-07-14 |
AU2003259026A1 (en) | 2004-06-18 |
AU2003259026B9 (en) | 2008-03-13 |
AU2003259026B8 (en) | 2004-06-18 |
CA2473450A1 (en) | 2004-06-10 |
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