CN101422774A - Preparation method of enamel surface coatings with hydrophobic effect - Google Patents
Preparation method of enamel surface coatings with hydrophobic effect Download PDFInfo
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- CN101422774A CN101422774A CNA2008102041975A CN200810204197A CN101422774A CN 101422774 A CN101422774 A CN 101422774A CN A2008102041975 A CNA2008102041975 A CN A2008102041975A CN 200810204197 A CN200810204197 A CN 200810204197A CN 101422774 A CN101422774 A CN 101422774A
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- enamel
- preparation
- hydrophobic effect
- water
- room temperature
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Abstract
The invention relates to a method for preparing an enamel surface coating with hydrophobic effect. The method includes the following steps of: (1) cleaning an enamel substrate by using deionized water and drying the enamel substrate in a drier; (2) preparing sol by mixing Si(OC2H5)4, C2H5OH, H2O, HCl and DMF with the mol ratio of 1 to 2.5:2 to 5:3 to 8:0.1 to 0.4:1 to 4, stirring the mixture for 1-2h at the room temperature, and adding a hydrophobing agent to obtain the pH value ranging from 1 to 4; (3) seasoning the sol at the room temperature for 8-12 days; and (4) adopting a dip coating method to dip the enamel substrate in the step (1) in the sol and to vertically lift and pull the enamel substrate, and keeping the temperature of the enamel substrate at the temperature ranging from 60 DEG C to 200 DEG C for 5-20h, and obtaining the enamel surface coating after cooling. The material of the enamel surface coating with the hydrophobic effect has high combination strength, the contact angle can reach 140 degrees, the hydrophobic effect is good and can be kept for long time, the preparation method is simply and conveniently operated, and the production cost is low.
Description
Technical field
The invention belongs to the preparation field of enamel surface coatings, particularly relate to a kind of preparation method with enamel surface coatings of hydrophobic effect.
Background technology
Enamelling sheet steel has been widely used in the internal and external ornament of building, the decoration of subway station, the decoration of subterranean tunnel; and enamel water heater and enamelled vessel etc.; and have hydrophobic effect enamel not only can play protection and decorative effect because its good hydrophobic effect can also play the effect of cleaning.The enamel of particularly using on the floor, hydrophobic effect can make the water entrained dirt that accumulates on the floor, and harmful substance etc. are in time removed, and help clean environment and environmental protection.
The hydrophobicity of coating is directly related with the chemical characteristic of coating surface roughness and coating itself.At present, both at home and abroad to the research of hydrophobic material mainly by following two kinds of methods preparation: the one, improve the chemical characteristic of material surface material, the 2nd, improve membrane superficial tissue.With regard to chemical composition, mainly be atomic radicals such as the organic polymer carbon that contains a large amount of low-surface-energies, silicon, fluorine, it can reduce greatly material the surface can, its hydrophobicity is strengthened.
Sol-gel technology prepares silicon dioxide gel, present technical maturity, easy and simple to handle, and, silicon dioxide gel itself is exactly good water-repelling agent, utilize this method further to use some water-repelling agents (atomic radicals such as carbon, silicon, fluorine that contain a large amount of low-surface-energies) to carry out finishing the silicon dioxide gel that makes, thereby strengthened hydrophobic effect, for the stronger coating material of preparation hydrophobic effect is laid a good foundation.The modified silicon dioxide gel coating that is coated on the enamelling sheet steel has in conjunction with tight, the intensity height, and technology is simple, low cost and other advantages.So far yet there are no about utilizing sol-gel technology that modified silicon dioxide gel is coated in and prepare report on the enamel plate with hydrophobic effect enamel coating.
Summary of the invention
Technical problem to be solved by this invention provides a kind of preparation method with enamel surface coatings of hydrophobic effect, enamel surface coatings material bond strength height with hydrophobic effect of the present invention, hydrophobic effect is good, effective acting time is strong, characteristics such as this preparation technology has easy and simple to handle, and production cost is low.
A kind of preparation method with enamel surface coatings of hydrophobic effect of the present invention comprises:
(1) with behind the porcelain enamel substrate usefulness washed with de-ionized water 30min-1h, places 80 ℃ of-100 ℃ of following oven for drying;
(2) preparation of colloidal sol is 1～2.5: 2～5 with mol ratio: 3～8: 0.1～0.4: 1～4 Si (OC
2H
5)
4, C
2H
5OH, H
2O, HCl, DMF is mixed, after 1-2 hour, slowly adds the water-repelling agent for preparing with the stirring of magnetic agitation instrument under the room temperature, and colloidal sol is carried out finishing, and the volume fraction 2%～5% of control water-repelling agent is between the pH value 1～4;
(3) colloidal sol ageing at room temperature is 8～12 days, before complete gelation;
(4) adopt dip coating, the porcelain enamel substrate of step (1) is immersed in (1-3) min in the colloidal sol, vertically lift with (0.5-1) cm/s speed, make the dioxide/silica gel liquid solution of modifying through water-repelling agent be coated in the surface of porcelain enamel substrate equably, then 60 ℃-200 ℃ insulations 5-20 hours, slowly cooling, promptly.
The water-repelling agent of described step (2) is dimethylchlorosilane (DMCS) or trim,ethylchlorosilane (TMCS).
The mol ratio of described step (2) is Si (OC
2H
5)
4: C
2H
5OH: H
2O: HCl: DMF=1: 2: 3.5: 0.4: 1, the volume fraction of water-repelling agent DMCS is 2.5%, pH value is 1.5, the colloidal sol that forms after hydrolysis ageing at room temperature 9 days.
The mol ratio of described step (2) is Si (OC
2H
5)
4: C
2H
5OH: H
2O: HCl: DMF=2: 4: 4: 0.3: 2, the volume fraction 5% of water-repelling agent TMCS, pH value is 3.0, the colloidal sol that forms after hydrolysis ageing at room temperature 10 days.
The porcelain enamel substrate of described step (1) or (4) is common enamel plate, does not need through specially treated, and the size of plate can be arbitrarily.
The present invention is that to utilize with TEOS, DMCS be raw material, by the two hydrolysis-condensation reaction to SiO
2Introduce hydrophobic organic group-CH in the network
3Thereby, make SiO with certain hydrophobic ability
2Film.Because the silanol group (SiOH) that generates after the TEOS hydrolysis is rich in reactivity, energy and many organic compounds react, as alcohols (ROH), alkanolamine (HORCH
2NH
2), dimethyldichlorosilane [(CH
3)
2SiCl
2], trim,ethylchlorosilane [(CH
3)
3SiCl] and other chlorosilane class, polysiloxanes (silicone oil), hexamethyldisilazane class etc.The dimethylchlorosilane that the present invention selects for use is as water-repelling agent, and its reaction equation is as follows:
≡SiOH+Cl
2Si(CH
3)
2≡SiOSiCl(CH
3)
2+HCl
By such reaction, originally behind the micelle surface hydrolysis, form a part of silanol group, even all replaced, thereby make the hydrophobic silica film by methyl or other alkyl.Zhi Bei hydrophobicity enamel material in this way, self is nontoxic, alkaline-resisting acidproof to human body, is environment-friendly material.
The enamel material of the hydrophobic effect of the present invention's preparation can make the contact angle of enamel reach as high as 140 °, and the contact angle of general enamel material only is 40 °.
Beneficial effect
(1) the enamel surface coatings material with hydrophobic effect of the present invention has excellent chemical stability and protective, and contact angle reaches as high as 140 °, and hydrophobic effect is strong, and hydrophobic effective time is long, can play good cleaning action;
(2) this preparation technology requires simply, and the sol-gal process cost of employing is low, does not need special coating equipment.
Description of drawings
The hydrophobic effect of the enamel plate after Fig. 1 is modified;
Fig. 2 is the hydrophobicity of not modified enamel plate.
The specific embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment 1
(1) with common enamel plate washed with de-ionized water 30min, places 80 ℃ of following oven for drying;
(2) preparation of colloidal sol is 1: 2: 3.5 with mol ratio: 0.4: 1 Si (Oc
2H
5)
4, C
2H
5OH, H
2O, HCl, DMF is mixed, after 1 hour, slowly adds the dimethylchlorosilane (DMCS) for preparing with the stirring of magnetic agitation instrument under the room temperature, and colloidal sol is carried out finishing, and the volume fraction of control DMCS is 2.5%, and pH value is 1.5;
(3) ageing at room temperature of the colloidal sol of the formation after the hydrolysis is 9 days, and before complete gelation, solution viscosity reaches the best and films the time;
(4) adopt dip coating, the porcelain enamel substrate of step (1) is immersed in the described colloidal sol, after one minute, vertically lift with 0.5cm/s speed, make the dioxide/silica gel liquid solution of modifying through DMCS be coated in the surface of porcelain enamel substrate equably, be incubated 20 hours then under 60 ℃ of conditions, slowly the porcelain enamel substrate with hydrophobic effect is made in cooling;
The average contact angle that adopts the contact angle instrument to measure porcelain enamel substrate is 115 °, 120 ° of maximum contact angles, and the contact angle of general not modified enamel plate only is 40 °.This explanation the present invention can significantly improve the hydrophobicity of enamel material.
Embodiment 2
(1) with common enamel plate washed with de-ionized water 30min, places 80 ℃ of following oven for drying;
(2) preparation of broad glue is 2: 4: 4 with mol ratio: 0.3: 2 Si (OC
2H
5)
4, C
2H
5OH, H
2O, HCl, DMF is mixed, after 1 hour, slowly adds the trim,ethylchlorosilane (TMCS) for preparing with the stirring of magnetic agitation instrument under the room temperature, and colloidal sol is carried out finishing, and the volume fraction of control DMCS is 5%, and pH value is 3;
(3) ageing at room temperature of the colloidal sol of the formation after the hydrolysis is 10 days, and before complete gelation, solution viscosity reaches the best and films the time;
(4) use dip coating, the porcelain enamel substrate of step (1) is immersed in the described colloidal sol, after one minute, vertically lift with 0.5cm/s speed, make the dioxide/silica gel liquid solution of modifying through TMCS be coated in the surface of porcelain enamel substrate equably, be incubated 10 hours then under 80 ℃ of conditions, slowly the porcelain enamel substrate with hydrophobic effect is made in cooling; The average contact angle that adopts the contact angle instrument to measure porcelain enamel substrate is 120 °, 135 ° of maximum contact angles.
Claims (5)
1. preparation method with enamel surface coatings of hydrophobic effect comprises:
(1) with behind the porcelain enamel substrate usefulness washed with de-ionized water 30min-1h, places 80 ℃ of-100 ℃ of following oven for drying;
(2) preparation of colloidal sol is the Si (OC of 1～2.5:2～5:3～8:0.1～0.4:1～4 with mol ratio
2H
5)
4, C
2H
5OH, H
2O, HCl, DMF is mixed, after 1-2 hour, slowly adds the water-repelling agent for preparing with the stirring of magnetic agitation instrument under the room temperature, the volume fraction 2%～5% of control water-repelling agent, pH value 1～4;
(3) colloidal sol ageing at room temperature is 8～12 days, before complete gelation;
(4) adopt dip coating, the porcelain enamel substrate of step (1) is immersed in 1-3min in the colloidal sol, vertically lift with 0.5cm/s-1cm/s speed, make the dioxide/silica gel liquid solution of modifying through water-repelling agent be coated in the surface of porcelain enamel substrate equably, then 60 ℃-200 ℃ insulations 5-20 hours, slowly cooling, promptly.
2. a kind of preparation method with enamel surface coatings of hydrophobic effect according to claim 1 is characterized in that: the water-repelling agent of described step (2) is dimethylchlorosilane DMCS or trim,ethylchlorosilane TMCS.
3. a kind of preparation method with enamel surface coatings of hydrophobic effect according to claim 1 is characterized in that: the mol ratio of described step (2) is Si (OC
2H
5)
4: C
2H
5OH:H
2O:HCl:DMF=1:2:3.5:0.4:1, the volume fraction of water-repelling agent DMCS is 2.5%, pH value is 1.5, the colloidal sol that forms after hydrolysis ageing at room temperature 9 days.
4. a kind of preparation method with enamel surface coatings of hydrophobic effect according to claim 1 is characterized in that: the mol ratio of described step (2) is Si (OC
2H
5)
4: C
2H
5OH:H
2O:HCl:DMF=2:4:4:0.3:2, the volume fraction 5% of water-repelling agent TMCS, pH value is 3.0, the colloidal sol that forms after hydrolysis ageing at room temperature 10 days.
5. a kind of preparation method with enamel surface coatings of hydrophobic effect according to claim 1 is characterized in that: the porcelain enamel substrate of described step (1) or (4) is common enamel plate, does not need through specially treated, and the size of plate is arbitrarily.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102041975A CN101422774B (en) | 2008-12-09 | 2008-12-09 | Preparation method of enamel surface coatings with hydrophobic effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102041975A CN101422774B (en) | 2008-12-09 | 2008-12-09 | Preparation method of enamel surface coatings with hydrophobic effect |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101422774A true CN101422774A (en) | 2009-05-06 |
| CN101422774B CN101422774B (en) | 2011-04-27 |
Family
ID=40613785
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|---|---|---|---|
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101628827A (en) * | 2009-07-29 | 2010-01-20 | 河北理工大学 | Ceramic matrix lyophobic coating and preparation method thereof |
| CN102728577A (en) * | 2012-06-21 | 2012-10-17 | 信义汽车部件（芜湖）有限公司 | Method for improving surface tension of glass plastic accessory |
| CN102923955A (en) * | 2012-11-27 | 2013-02-13 | 武汉中冶斯瑞普科技有限公司 | Method for preparing nano enamel glaze |
| CN106544613A (en) * | 2016-11-30 | 2017-03-29 | 佛山市高明区诚睿基科技有限公司 | A kind of preparation method of use for laboratory rustless steel stirring rod |
| CN108863075A (en) * | 2018-07-20 | 2018-11-23 | 吴伟华 | A kind of enamel coating and application method |
| CN111526838A (en) * | 2017-11-02 | 2020-08-11 | 奇跃公司 | Preparing and dispensing polymeric materials and producing polymeric articles therefrom |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1102622C (en) * | 1998-10-07 | 2003-03-05 | 中国科学院山西煤炭化学研究所 | Moistureproof antireflecting silica coating and its preparation |
| CN100429009C (en) * | 2006-09-27 | 2008-10-29 | 中国科学院上海硅酸盐研究所 | Method of forming hydrophobic transparent film on the surface of different substrates |
| CN101280155B (en) * | 2007-04-02 | 2010-08-18 | 中国科学院化学研究所 | Self-cleaning film and preparation thereof |
| CN101270260B (en) * | 2008-01-28 | 2010-12-15 | 南京工业大学 | Ultra-hydrophobic surface coating material and preparation method thereof |
-
2008
- 2008-12-09 CN CN2008102041975A patent/CN101422774B/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101628827A (en) * | 2009-07-29 | 2010-01-20 | 河北理工大学 | Ceramic matrix lyophobic coating and preparation method thereof |
| CN102728577A (en) * | 2012-06-21 | 2012-10-17 | 信义汽车部件（芜湖）有限公司 | Method for improving surface tension of glass plastic accessory |
| CN102728577B (en) * | 2012-06-21 | 2014-11-19 | 信义汽车部件（芜湖）有限公司 | Method for improving surface tension of glass plastic accessory |
| CN102923955A (en) * | 2012-11-27 | 2013-02-13 | 武汉中冶斯瑞普科技有限公司 | Method for preparing nano enamel glaze |
| CN102923955B (en) * | 2012-11-27 | 2014-09-24 | 武汉中冶斯瑞普科技有限公司 | Method for preparing nano enamel glaze |
| CN106544613A (en) * | 2016-11-30 | 2017-03-29 | 佛山市高明区诚睿基科技有限公司 | A kind of preparation method of use for laboratory rustless steel stirring rod |
| CN106544613B (en) * | 2016-11-30 | 2019-01-22 | 佛山市高明区诚睿基科技有限公司 | A kind of preparation method of use for laboratory stainless steel stirring rod |
| CN111526838A (en) * | 2017-11-02 | 2020-08-11 | 奇跃公司 | Preparing and dispensing polymeric materials and producing polymeric articles therefrom |
| CN111526838B (en) * | 2017-11-02 | 2022-03-22 | 奇跃公司 | Preparing and dispensing polymeric materials and producing polymeric articles therefrom |
| US11413591B2 (en) | 2017-11-02 | 2022-08-16 | Magic Leap, Inc. | Preparing and dispensing polymer materials and producing polymer articles therefrom |
| CN108863075A (en) * | 2018-07-20 | 2018-11-23 | 吴伟华 | A kind of enamel coating and application method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101422774B (en) | 2011-04-27 |
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Granted publication date: 20110427 Termination date: 20131209 |