CN102824168B - Flexible physiological dry electrode and preparation method thereof - Google Patents
Flexible physiological dry electrode and preparation method thereof Download PDFInfo
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- CN102824168B CN102824168B CN201210228067.1A CN201210228067A CN102824168B CN 102824168 B CN102824168 B CN 102824168B CN 201210228067 A CN201210228067 A CN 201210228067A CN 102824168 B CN102824168 B CN 102824168B
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Abstract
The invention relates to a flexible physiological dry electrode and a preparation method of the flexible physiological dry electrode. The flexible physiological dry electrode comprises a conductive poly-dimethyl siloxane electrode and a connection buckle; the conductive poly-dimethyl siloxane electrode is used for contacting the skin; the connection buckle is used for leading out a lead to a measurement circuit, and the connection buckle is partially embedded inside the conductive poly-dimethyl siloxane electrode. The conductive poly-dimethyl siloxane electrode has the advantages of being high in collecting quality, strong in reliability, safe and comfortable, low in cost and wide in application range.
Description
Technical field
The present invention relates to biomedical sector, be specifically related to a kind of flexible physiological dry electrode and preparation method thereof.
Background technology
In recent years, along with aging population becomes increasingly conspicuous, what make health care, " home care " system develops into urgent demand.Traditional therapy for the treatment of disease mostly be disease send out after treatment, prevention and real-time diagnosis and treatment can not be accomplished well, the new technique of wireless body area network representative is then by the real-time analysis process to existing physiological parameter, thus early warning is carried out to premorbid, or provide emergency plan timely to during morbidity.In wireless body area network system, physiological electrode plays vital effect.Physiological electrode towards wireless body area network can be used for measuring the electro-physiological signals of human body, as electrocardiogram (ECG), electroencephalogram (EEG), electromyogram (EMG) etc.
The Human Physiology signal of telecommunication is the result of the electrochemical activity of a part of competent cell (as neuron, muscular tissue etc.) in body, and electro-physiological signals propagates into human body surface through volume conductor, and is accepted by physiological electrode.When human body generation pathology or changing function, namely there is corresponding change in this curve, thus be the clinical means providing a kind of diagnosis, treatment, monitoring.
The legacy equipment of electro-physiological signals collection is based on wet electrode.Because keratodermatitis impedance comparison is high, in order to reduce the contact impedance between electrode and skin, improve signal quality, user needs to smear conductive paste at skin surface and process (as cleaning, friction etc.) to reduce the impact of horny layer on the electro-physiological signals collected to skin before collection electro-physiological signals.But smear conductive paste to need to carry out under stranger is auxiliary, and take a long time, therefore, smearing conductive paste is the work taking time and effort ground.And conductive paste usually can dewater exsiccation after one to two hours, long-term acquisition electro-physiological signals cannot be carried out.In addition, the process of skin usually produces very large injury to skin, and cause the diseases such as the infection of skin, redness, especially for child and the elderly, the injury of skin is more obvious.
Find by prior art documents, Suzushi Nishimura, the people such as Yutaka Tomita are at IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING39 (1): 1096-1099 writes articles " Clinical Application of an Active Electrode Using an Operational Amplifier " (" being applied to the active electrode with amplifier of clinic "), and this article mentions that the dry electrode adopting rustless steel to make is used for measuring electro-physiological signals.Without the need to smearing conductive paste at skin surface and carrying out treatment step to skin during the work of this electrode, the problem run into when solving wet electrode work.But still there are two subject matters in this dry electrode: one is this dry electrode is adopt this rigid material of rustless steel to make, space is there is in the dry electrode of rigid material when contacting with human body surface, cause the contact area reducing electrode and skin, thus add the contact impedance of electrode and skin.Important parameter time contact impedance is electricity physiological signal collection, contact impedance is lower, and signal quality is better.Two is that this dry electrode pair user is very uncomfortable, also there is potential safety problem to user.
Summary of the invention
For above-mentioned the deficiencies in the prior art and defect, the object of the present invention is to provide a kind of flexible physiological dry electrode, to solve the high and technical problem of poor safety performance of contact impedance that the dry electrode of existing rigidity exists.
For above-mentioned the deficiencies in the prior art and defect, another object of the present invention is to the preparation method that flexible physiological dry electrode is provided, to solve the high and technical problem of poor safety performance of contact impedance that the dry electrode of existing rigidity exists.
For achieving the above object, the invention provides a kind of flexible physiological dry electrode, comprise: can conduct electricity polydimethylsiloxane electrode and junction button, can conduct electricity polydimethylsiloxane electrode for contact skin, junction button is for drawing wire to measuring circuit, and junction button part is embedded in can conduct electricity in polydimethylsiloxane.
According to the flexible physiological dry electrode described in present pre-ferred embodiments, this can conduct electricity polydimethylsiloxane electrode is made up of the conductive doped granule of polydimethylsiloxane, and conductive particle adopts CNT, and the mass ratio of CNT is 2%-10%.
According to the flexible physiological dry electrode described in present pre-ferred embodiments, this can conduct electricity polydimethylsiloxane electrode is made up of the conductive doped granule of polydimethylsiloxane, and conductive particle adopts argentum powder, and the mass ratio of argentum powder is 84%.
According to the flexible physiological dry electrode described in present pre-ferred embodiments, the diameter of this junction button is 2mm, and thickness is 3mm.
According to the flexible physiological dry electrode described in present pre-ferred embodiments, this diameter that can conduct electricity polydimethylsiloxane electrode is 20mm, and thickness is 2mm.
For achieving the above object, the present invention also provides a kind of preparation method of flexible physiological dry electrode, comprises the following steps:
(1) junction button and one piece of paillon foil are stacked together and put into a container;
(2) polydimethylsiloxane is poured in container, put into baking oven after being filled up by container and polydimethylsiloxane is solidified.
(3) after solidification, the polydimethylsiloxane being connected with junction button and paillon foil is taken out in container, remove paillon foil, dimethyl siloxane is after hardening formed a groove.。
(4) polydimethylsiloxane is mixed with conductive particle and firming agent, make and can conduct electricity polydimethylsiloxane.
(5) polydimethylsiloxane that can conduct electricity is poured in the groove of the polydimethylsiloxane after removing paillon foil, and puts into oven for curing, after solidification, is removed by polydimethylsiloxane, makes flexible physiological dry electrode.
According to the preparation method of the flexible physiological dry electrode described in present pre-ferred embodiments, conductive particle adopts CNT or argentum powder.
According to the preparation method of the flexible physiological dry electrode described in present pre-ferred embodiments, this paillon foil diameter is 0.5cm-30mm, and thickness is 1mm-5mm.
According to the preparation method of the flexible physiological dry electrode described in present pre-ferred embodiments, this can conduct electricity the diameter of polydimethylsiloxane and thickness determines according to the diameter of paillon foil and thickness, the diameter of polydimethylsiloxane of can conducting electricity is 0.5cm-30mm, and thickness is 1mm-5mm.
According to the preparation method of the flexible physiological dry electrode described in present pre-ferred embodiments, with the solidification in an oven in step (5), step (2) refers to that 70 DEG C are heated 2 hours in an oven.
Using method of the present invention is: can conduct electricity polydimethylsiloxane electrode paste at skin surface, electrode receives the physiological signal from inside of human body, draws wire be connected to outside measuring circuit by junction button.Make owing to adopting polydimethylsiloxane and can conduct electricity polydimethylsiloxane electrode, therefore, electrode has flexibility characteristics, skin surface can be close to do not interspace, add the contact area of electrode and skin, reduce the contact impedance of electrode and skin, improve the acquisition quality of physiological signal.
The flexible physiological dry electrode that the present invention adopts the method can conducting electricity polydimethylsiloxane casting to make, cost of manufacture is low, and processing technology is simple.Utilize the deficiency that present invention improves the dry electrode of current rigidity, add the contact area of electrode and skin, reduce the contact impedance of electrode and skin, also improve comfortableness and the safety of brain electrode simultaneously.The present invention is utilized to measure electro-physiological signals, workable, be applicable to long term monitoring, widen the range of application of physiological electrode.
In sum, compared with prior art, the present invention has that acquisition quality is high, reliability is strong, safety and comfort, cost are low and scope of application advantage widely.
Accompanying drawing explanation
Fig. 1 is the structural representation of flexible physiological dry electrode of the present invention;
Fig. 2 a ~ Fig. 2 d is flexible physiological dry electrode preparation process schematic diagram of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, illustrate the present invention.
Refer to Fig. 1, a kind of flexible physiological dry electrode, comprise: can conduct electricity polydimethylsiloxane electrode 1 and junction button 2, can conduct electricity polydimethylsiloxane electrode 1 for contact skin, junction button 2 is for drawing wire to measuring circuit, and junction button 2 part is embedded in can conduct electricity in polydimethylsiloxane 1.
Particularly, the polydimethylsiloxane electrode 1 that can conduct electricity is made up of the conductive doped granule of polydimethylsiloxane, and conductive particle adopts CNT or argentum powder, the mass ratio of concrete adulterated material is determined according to concrete adulterated material and concrete process for dispersing.Preferably, the mass ratio of CNT is 2%-10%; The mass ratio of argentum powder is 84%.
Further, the diameter of junction button 2 is 2mm, and thickness is 3mm.The diameter of polydimethylsiloxane electrode 2 of can conducting electricity is 0.5cm-30mm, and thickness is 1mm-5mm, and preferably, diameter is 20mm, and thickness is 2mm.
The present invention also provides a kind of preparation method of flexible physiological dry electrode, comprises the following steps:
(1) junction button and one piece of paillon foil are stacked together and put into a container;
In this example, container adopts culture dish, and in actual applications, container can be any one in culture dish, beaker etc.The paillon foil that the present invention adopts can be any one material, and foil thickness can be determined according to the thickness of electrode, and preferably, paillon foil diameter is 0.5cm-3cm, and thickness is 1mm-0.5cm.
(2) polydimethylsiloxane is poured in container, put into baking oven after being filled up by container and polydimethylsiloxane is solidified.
(3) after solidification, the polydimethylsiloxane being connected with junction button and paillon foil is taken out in container, remove paillon foil, dimethyl siloxane is after hardening formed a groove.
(4) polydimethylsiloxane is mixed with conductive particle, make and can conduct electricity polydimethylsiloxane.
Concrete, conductive particle adopts the material such as CNT or argentum powder, and the mass ratio of the concrete material adulterated is determined according to concrete adulterated material and concrete process for dispersing, and as adopted CNT, the mass ratio of CNT is 2%-10%; According to argentum powder, then the mass ratio of argentum powder is 84%.
(5) polydimethylsiloxane that can conduct electricity is poured in the groove of the polydimethylsiloxane after removing paillon foil, and puts into oven for curing, after solidification, is removed by polydimethylsiloxane, makes flexible physiological dry electrode.
Concrete, the diameter of polydimethylsiloxane of can conducting electricity is 0.5cm-30mm, and thickness is 1mm-5mm, and preferably, diameter is 20mm, and thickness is 2mm.
With the solidification in an oven in step (5), step (2) refers to that 70 DEG C are heated 2 hours in an oven.
Below enumerate the preparation method of embodiment to flexible physiological dry electrode of the present invention to be specifically described.
Embodiment one
As shown in Fig. 2 a to Fig. 2 d, paillon foil 3 and junction button 2 are placed in culture dish 4, inject polydimethylsiloxane 5, put into baking oven and solidify 2 hours under 70 DEG C of conditions.After solidification, remove culture dish 3, polydimethylsiloxane is connected paillon foil 3 and junction button 2 turns, remove paillon foil 3, polydimethylsiloxane is after hardening formed a groove, then the polydimethylsiloxane 6 of the CNT that adulterated is cast in groove 7, put into baking oven and solidify 2 hours under 70 DEG C of conditions.Finally, remove polydimethylsiloxane 5 and just obtain flexible physiological dry electrode of the present invention, as shown in Figure 1.
The application request size used of the present embodiment is as shown in table 1, and it is one group of decision design parameter of flexible physiological dry electrode of the present invention.
| Paillon foil diameter | 20mm |
| Foil thickness | 2mm |
| Junction button diameter | 2mm |
| Junction button height | 3mm |
| Culture dish diameter | 70mm |
| Can conduct electricity polydimethylsiloxane diameter | 20mm |
| Can conduct electricity polydimethylsiloxane thickness | 2mm |
Table one
The flexible physiological dry electrode that the present invention adopts the method can conducting electricity polydimethylsiloxane casting to make, cost of manufacture is low, and processing technology is simple.Utilize the deficiency that present invention improves the dry electrode of current rigidity, add the contact area of electrode and skin, reduce the contact impedance of electrode and skin, also improve comfortableness and the safety of brain electrode simultaneously.The present invention is utilized to measure electro-physiological signals, workable, be applicable to long term monitoring, widen the range of application of physiological electrode.
The above, it is only better embodiment of the present invention, not any pro forma restriction is done to the present invention, any content not departing from technical solution of the present invention, the any simple modification done above embodiment according to technical spirit of the present invention, equivalent variations and modification, all belong to the scope of technical solution of the present invention.
Claims (4)
1. the preparation method of a flexible physiological dry electrode, described flexible physiological dry electrode is used for the measurement of electro-physiological signals, comprise: can conduct electricity polydimethylsiloxane electrode and junction button, described conduct electricity polydimethylsiloxane electrode for contact skin, described junction button is for drawing wire to measuring circuit, described junction button part is embedded in described can conduction in polydimethylsiloxane, wherein, the described polydimethylsiloxane electrode that conducts electricity is made up of the conductive doped granule of polydimethylsiloxane, described conductive particle adopts CNT, and the mass ratio of CNT is 2%-10%, or the described polydimethylsiloxane electrode that conducts electricity is made up of the conductive doped granule of polydimethylsiloxane, described conductive particle adopts argentum powder, and the mass ratio of argentum powder is 84%,
It is characterized in that, comprise the following steps:
(1) junction button and one piece of paillon foil are stacked together and put into a container;
(2) polydimethylsiloxane is poured in described container, put into baking oven after being filled up by container and polydimethylsiloxane is solidified;
(3) after solidification, the polydimethylsiloxane being connected with junction button and paillon foil is taken out in container, remove paillon foil, dimethyl siloxane is after hardening formed a groove;
(4) polydimethylsiloxane is mixed with conductive particle, make and can conduct electricity polydimethylsiloxane;
(5) polydimethylsiloxane that can conduct electricity is poured in the groove of the polydimethylsiloxane after removing paillon foil, and puts into oven for curing, after solidification, is removed by polydimethylsiloxane, makes flexible physiological dry electrode.
2. the preparation method of flexible physiological dry electrode according to claim 1, is characterized in that, described paillon foil diameter is 0.5cm-30mm, and thickness is 1mm-5mm.
3. the preparation method of flexible physiological dry electrode according to claim 1, is characterized in that, the described diameter conducting electricity polydimethylsiloxane is 0.5cm-30mm, and thickness is 1mm-5mm.
4. the preparation method of flexible physiological dry electrode according to claim 1, is characterized in that, step (2) and the solidification in an oven described in step (5) refer to that 70 DEG C are heated 2 hours in an oven.
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| CN107690307B (en) * | 2015-05-28 | 2021-07-27 | 皇家飞利浦有限公司 | Dry electrodes for biopotential and skin impedance sensing and methods of use |
| CN104970788B (en) * | 2015-07-20 | 2018-08-07 | 上海帝仪科技有限公司 | Flexible dry electrode and its manufacturing method and biopotential acquisition system |
| CN105342602B (en) * | 2015-10-30 | 2018-04-17 | 恩识医疗科技(上海)有限公司 | A kind of preparation method of CNT PDMS combination electrodes |
| CN107411735A (en) * | 2017-08-30 | 2017-12-01 | 华南理工大学 | A kind of bioelectrical signals flexibility dry-type electrode and preparation method thereof |
| CN108294747A (en) * | 2018-01-16 | 2018-07-20 | 中国科学院半导体研究所 | Aligned carbon nanotube adheres to dry electrode and its preparation process certainly |
| CN108771540A (en) * | 2018-06-25 | 2018-11-09 | 恩识医疗科技(上海)有限公司 | A kind of preparation method of CNT-Ag-PDMS conductive mixtures and its composite dry electrode |
| CN108766621B (en) * | 2018-06-25 | 2023-11-24 | 恩识医疗科技(上海)有限公司 | Conductive mixture and preparation method of flexible electrocardio electrode thereof |
| CN110353678B (en) * | 2019-07-10 | 2022-03-01 | 南开大学 | Waterproof electromyographic signal sensor based on conductive silica gel |
| CN112967832B (en) * | 2021-02-01 | 2023-02-28 | 天津理工大学 | Flexible comb-shaped semi-dry electrode and preparation method thereof |
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| WO2006064447A2 (en) * | 2004-12-14 | 2006-06-22 | Philips Intellectual Property & Standards Gmbh | Monitoring system for monitoring of a physiological parameter of a recipient |
| TWI475978B (en) * | 2009-01-17 | 2015-03-11 | Ind Tech Res Inst | Dry electrode and manufacturing method thereof |
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Patent Citations (4)
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| EP0255241A2 (en) * | 1986-06-30 | 1988-02-03 | Nepera, Inc. | Medical electrode |
| WO2011070403A1 (en) * | 2009-12-11 | 2011-06-16 | Universidade De Aveiro | A dry active bio signal electrode with an hybrid organic-inorganic interface material |
| CN102206419A (en) * | 2011-04-02 | 2011-10-05 | 合肥工业大学 | Sensitive material for flexible temperature sensor |
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