CN115919320A - Flexible electrode and preparation method and application thereof - Google Patents
Flexible electrode and preparation method and application thereof Download PDFInfo
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- CN115919320A CN115919320A CN202211592975.9A CN202211592975A CN115919320A CN 115919320 A CN115919320 A CN 115919320A CN 202211592975 A CN202211592975 A CN 202211592975A CN 115919320 A CN115919320 A CN 115919320A
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- 238000002360 preparation method Methods 0.000 title abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 69
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- 238000000034 method Methods 0.000 claims abstract description 13
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- 239000011248 coating agent Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 239000004642 Polyimide Substances 0.000 claims description 4
- 229920001721 polyimide Polymers 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000012790 adhesive layer Substances 0.000 claims description 3
- 239000003575 carbonaceous material Substances 0.000 claims description 3
- 229920001940 conductive polymer Polymers 0.000 claims description 3
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- 229910052751 metal Inorganic materials 0.000 claims description 3
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- 239000004814 polyurethane Substances 0.000 claims description 3
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- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 238000004544 sputter deposition Methods 0.000 claims description 3
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/25—Bioelectric electrodes therefor
- A61B5/251—Means for maintaining electrode contact with the body
- A61B5/257—Means for maintaining electrode contact with the body using adhesive means, e.g. adhesive pads or tapes
- A61B5/259—Means for maintaining electrode contact with the body using adhesive means, e.g. adhesive pads or tapes using conductive adhesive means, e.g. gels
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/25—Bioelectric electrodes therefor
- A61B5/263—Bioelectric electrodes therefor characterised by the electrode materials
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/25—Bioelectric electrodes therefor
- A61B5/263—Bioelectric electrodes therefor characterised by the electrode materials
- A61B5/266—Bioelectric electrodes therefor characterised by the electrode materials containing electrolytes, conductive gels or pastes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/25—Bioelectric electrodes therefor
- A61B5/263—Bioelectric electrodes therefor characterised by the electrode materials
- A61B5/268—Bioelectric electrodes therefor characterised by the electrode materials containing conductive polymers, e.g. PEDOT:PSS polymers
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Heart & Thoracic Surgery (AREA)
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- Molecular Biology (AREA)
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- Animal Behavior & Ethology (AREA)
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- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
Abstract
The invention relates to the technical field of electrodes, in particular to a flexible electrode and a preparation method and application thereof. The flexible electrode includes: the electrode substrate comprises two opposite sides, wherein one side of the electrode substrate is provided with an adhesion layer, and the other side of the electrode substrate is provided with a circuit and an electrode detection point which are connected; the electrode detection point is provided with a detection hole which penetrates through the electrode substrate and the adhesion layer; and the conductive gel is accommodated in the detection hole and is in contact with the conductive layer of the electrode detection point. The flexible electrode avoids the mutual influence of the adhesion layer, the circuit and the electrode detection point by separating the adhesion layer, the circuit and the electrode detection point, and can furthest keep the excellent electrical property and stretchability of the conductive layer; and the conductive gel is used for connecting the conductive pattern (comprising a circuit and an electrode detection point) with the skin through the hole structure to acquire signals, so that the complex and complicated processes of insulation, encapsulation and the like are avoided, and the simple, convenient and quick preparation of the electrode is realized.
Description
Technical Field
The invention relates to the technical field of electrodes, in particular to a flexible electrode and a preparation method and application thereof.
Background
The physiological activities of the human body are accompanied by the generation of electric signals, and the electric physiological signals (electrocardio, myoelectricity, electroencephalogram and the like) are important indexes reflecting the physiological activities and the states of the human body. For example, a doctor can analyze and diagnose diseases such as myocardial infarction of a patient according to the acquired electrocardiogram waveform details; clinical analysis of brain diseases can be performed by collecting electroencephalographic data. In addition, transdermal electrical stimulation is a frequently used means for assisting the treatment of diseases in clinical use. Body surface electrodes are currently the most common type of electrode, and are widely used because they are non-invasive. The electrophysiological information is detected on the body surface through the electrodes and feedback intervention is carried out, so that the method has important scientific and clinical significance for understanding the pathology and development of neuromuscular diseases, carrying out intervention rehabilitation and the like.
For the electrode to perform high-quality bioelectricity detection and electrical stimulation, the electrode needs to be in good contact coupling with the body so as to transmit electrical signals. Meanwhile, in order to satisfy comfortable and dynamically stable signal acquisition, the electrode is required to have good conductivity and small electrical property change under stretching and dynamic conditions. In addition, the electrode should adhere well to the body and not fall off easily. Furthermore, in some special cases, a large area of muscle groups needs to be monitored for biological signals, which requires that the electrodes can be easily processed into a high density electrode array and be flexibly attached.
At present, a commercial gel patch is used as a commonly used electrode, the size is large, the stretching is difficult, the spatial resolution is low in a high-density application scene, the pasting is time-consuming, and the operation is inconvenient. There are also some high-density electrodes based on polyimide substrate, which, although realizing high-resolution monitoring of physiological telecommunication, are not stretchable and still have high hardness, and need to be adhered with double-sided adhesive tape to realize adhesion with skin, and are difficult to use in some muscle-shaped and limb-active areas. At present, there are some researches trying to develop flexible and stretchable thin film electrodes and high density electrodes, but they often use intermolecular forces for adhesion (advanced functional materials,2018,28 1803279), and have poor strength and are difficult to use stably. There have been some researches on the fabrication of flexible electrodes or multi-channel electrodes by using flexible substrates and printing techniques, but such electrodes are often all of the same type of structure (application No.: 2021103574879): after a conducting layer and an electrode layer are prepared on a substrate, an insulating layer is directly prepared on the conducting layer and the electrode layer, then a packaging layer is prepared upwards, and finally an adhesive layer is prepared. The structure enables the electrodes and the circuit layer to form a plurality of composite film layers, has great influence on the electrical property and the mechanical property of the electrodes, is complex to prepare, and is not beneficial to reducing the cost and the process.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a flexible electrode and a preparation method and application thereof.
To solve the above technical problem, a first aspect of the present invention provides a flexible electrode, including: the electrode substrate comprises two opposite sides, wherein one side of the electrode substrate is provided with an adhesion layer, and the other side of the electrode substrate is provided with a circuit and an electrode detection point which are connected; the electrode detection point is provided with a detection hole which penetrates through the electrode substrate and the adhesion layer; and a conductive gel is accommodated in the detection hole and is in contact with the conductive layer of the electrode detection point.
Furthermore, an insulating layer is arranged on the electrode substrate and is arranged above the circuit and the electrode detection point. The insulating layer is also called an encapsulation layer or a protection layer.
Further, the insulating layer is a film with an adhesion layer; or the insulating layer is a polymer film adhered to the electrode substrate, the circuit and the electrode detection point.
Furthermore, the substrate material of the electrode substrate is one or more of flexible stretchable materials of polyurethane, polyimide, silica gel and rubber.
Furthermore, the material of the circuit on the electrode substrate is one or more of a metal layer, a conductive polymer and a carbon material which are prepared by sputtering and blade coating.
Furthermore, the size of the detection hole is smaller than that of the electrode detection point.
Furthermore, the circuit and the electrode detection points are in a single-channel structure or a multi-channel high-density structure.
The second aspect of the present invention provides a method for preparing the above flexible electrode, comprising the following steps: preparing an electrode substrate, and respectively preparing an adhesion layer, a circuit and electrode detection points on two opposite sides of the electrode substrate; step two: forming detection holes at the positions of the electrode detection points, wherein the detection holes penetrate through the whole electrode substrate and the adhesion layer; step three: and coating conductive gel at the position of the detection hole, and enabling the conductive gel to be in contact with the conductive layer of the electrode detection point to obtain the flexible electrode.
Further, after the step three, the method further comprises a step four: an insulating layer is prepared on the side of the electrode substrate having the circuit and the electrode detection points.
The third aspect of the invention provides the application of the flexible electrode in the field of body surface detection.
Compared with the prior art, the provided technical scheme at least has the following advantages:
the invention provides a flexible electrode and a preparation method and application thereof, the flexible electrode avoids the mutual influence of an adhesion layer, a circuit and an electrode detection point by separating the adhesion layer and the circuit from the electrode detection point, and can furthest keep the excellent electrical property and stretchability of a conductive layer; the electrode circuit is connected with the skin through the electrode detection point conductive gel via the hole structure for signal acquisition, so that complex and complicated processes such as insulation, packaging and the like are avoided, and the simple and convenient rapid preparation of the electrode is realized; in addition, the structural design of the flexible electrode has better applicability to various electrode substrates and conductive pattern processing technologies.
Drawings
One or more embodiments are illustrated by corresponding figures in the drawings, which are not to be construed as limiting the embodiments, unless expressly stated otherwise, and the drawings are not to scale.
Fig. 1 is a flow chart and a structural diagram of a flexible electrode according to an embodiment of the present disclosure.
In the figure, 1-circuit, 2-electrode substrate, 3-adhesion layer, 4-detection point, 5-detection hole, 6-conductive gel and 7-insulating layer.
Detailed Description
As can be seen from the background art, the conventional electrode preparation method is to prepare the conductive layer and the electrode layer on the substrate, then directly prepare the insulating layer thereon, then prepare the encapsulation layer thereon, and finally prepare the adhesive layer. The structure enables the electrodes and the circuit layer to form a multilayer composite film layer, has great influence on the electrical property and the mechanical property of the electrodes, and has the problems of complex preparation and unfavorable reduction of cost and process.
Through research of the inventor, the invention provides the flexible electrode and the preparation method and application thereof, the flexible electrode adopts a structural design that the adhesion layer and the conducting layer are deviated, the conducting layer is directly prepared on the other side of the adhesion layer on the electrode film substrate, the phenomenon that the conducting layer is directly coated on the conducting layer to reduce the conductivity and the stretchability of the electrode is avoided, meanwhile, the conducting layer can be selectively packaged or not packaged, the simple and convenient and rapid preparation of the electrode is realized, and the electrode is endowed with better electrical property and mechanical property.
The following detailed description is made with reference to specific embodiments and accompanying drawings.
In the invention, a film with an adhesion layer 3 can be selected as an electrode substrate 2 during electrode preparation, a circuit 1 and an electrode detection point 4 are prepared on the other side of the substrate, then a detection hole 5 is drilled at the electrode detection point 4 to penetrate through the whole electrode substrate 2, the adhesion layer 3 and an electrode layer, and then a conductive gel 6 is coated at the drilled position and is in certain contact with a conductive layer at the detection point 4. Finally, an insulating layer 7 can be selectively prepared on the surface according to application scenes and requirements. The electrode can be designed with different structures and channel numbers according to requirements, and different substrates and conductive materials can be selected, so that the electrode has high applicability. The adhesion layer 3, the circuit 1 and the electrode points are respectively arranged on two sides of the electrode substrate 2, so that the influence of the adhesion layer 3 on the structure and the conductivity of the conductive pattern is avoided; the conductive pattern is connected with the skin through the gel at the hole structure, so that the conductive pattern does not need to be packaged by an electrode in a simple application scene on the body surface, and the whole operation is simple and convenient.
The preparation method of the flexible electrode provided by the invention comprises the following specific steps as shown in figure 1:
firstly, preparing a circuit 1 and an electrode detection point 4 on an electrode substrate 2 with an adhesion layer 3, wherein the electrode substrate 2 can be made of polyurethane, polyimide, silica gel and the like; the adhesion layer 3 can be prepared on the substrate before the circuit 1 and the electrode detection point 4 are prepared or after the circuit 1 and the electrode detection point 4 are prepared; the circuit 1, the electrode detection points 4 and the adhesion layer 3 are respectively arranged on two sides of the substrate; the preparation method of the electrode comprises the steps of obtaining a metal layer or a conductive polymer or a carbon material by the processes of sputtering, blade coating and the like; the circuit 1 and the electrode detection points 4 can be designed into a simple single-channel or complex multi-channel high-density structure according to the requirement;
secondly, punching detection holes 5 at the circuit 1 and the electrode detection points 4, wherein the detection holes 5 penetrate through the whole electrode substrate 2, the adhesion layer 3 and the electrode detection points 4; the shape of the detection hole 5 is arbitrary, and the size of the detection hole 5 is slightly smaller than that of the electrode detection point 4;
thirdly, coating conductive gel 6 at the punched position, and enabling the conductive gel to be in certain contact with the conductive layer at the electrode detection point 4, wherein the conductive gel 6 can be common commercial conductive gel 9 or gel cured by heat or ultraviolet assistance; the step of applying the conductive gel 6 may be performed before or after the electrodes are attached to the skin;
and fourthly, selectively preparing an insulating layer 7 on the surface of the substrate according to the application scene and requirements, wherein the insulating layer 7 can be bonded by using a film with the adhesion layer 3, and a polymer film can be prepared by other processes such as spin coating.
Examples
Firstly, a polyurethane film with an adhesion layer 3 is used as an electrode substrate 2, and a 16-channel gold film conductive pattern with a line width of 0.5mm is prepared on one side without the adhesion layer 3 in a magnetron sputtering mode. Then, a punch having a diameter of 2mm was used to punch a hole at the electrode detection point 4. The electrode was then transferred to the arm and a commercial conductive gel 6 was applied to the hole without additional encapsulation. The electrode and the skin form good conformal attachment, and after the electrode is connected with the myoelectric testing equipment, when a fist is made and other actions are performed, the equipment can acquire corresponding obvious myoelectric signals in different channels.
In summary, the invention provides a flexible electrode, a preparation method and an application thereof, the flexible electrode has better electrical properties and tensile properties, the preparation method greatly improves the processing simplicity of the flexible electrode, and the advantages thereof are mainly reflected in the following points:
1) The flexible electrode provided by the invention is soft, light and thin, can be easily adhered to the surface of skin, and has better conformal capability and simple operation.
2) The adhesion layer and the conductive layer in the flexible electrode provided by the invention are separated, so that the structural damage of the adhesion layer to the conductive layer and the influence on the performance of the conductive layer are avoided, and the electrode has better electrical property and tensile property.
3) In the flexible electrode provided by the invention, the conducting layer is arranged on the other side away from the skin, and the conducting layer is contacted with the skin in a mode of filling the conducting glue through the holes, so that the conducting layer can be selectively packaged or not packaged.
4) The flexible electrode structure provided by the invention has better applicability, can be adjusted according to various substrates and conductive materials, and has better application capability on single-channel and multi-channel high-density electrodes and stretchable electrodes.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the present application, and that various changes in form and details may be made therein without departing from the spirit and scope of the present application in practice. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the application, and it is intended that the scope of the application be limited only by the claims appended hereto.
Claims (10)
1. A flexible electrode, comprising: the electrode substrate (2), the said electrode substrate (2) includes two opposite sides, wherein one side has adhesion coatings (3), another side has circuit (1) and electrode detection point (4) connected to;
a detection hole (5) is formed in the electrode detection point (4), and the detection hole (5) penetrates through the electrode substrate (2) and the adhesion layer (3);
the detection hole (5) is internally provided with a conductive gel (6), and the conductive gel (6) is in contact with the conductive layer of the electrode detection point (4).
2. The flexible electrode according to claim 1, characterized in that an insulating layer (7) is further disposed on the electrode substrate (2), wherein the insulating layer (7) is disposed above the circuit (1) and the electrode detection point (4).
3. Flexible electrode according to claim 2, characterized in that the insulating layer (7) is a film provided with an adhesive layer (3); or the insulating layer (7) is a polymer film adhered to the electrode substrate (2), the circuit (1) and the electrode detection point (4).
4. The flexible electrode according to claim 1, wherein the electrode substrate (2) is made of one or more flexible stretchable materials selected from polyurethane, polyimide, silica gel, and rubber.
5. The flexible electrode according to claim 1, wherein the material of the circuit (1) on the electrode substrate (2) is one or more of a metal layer, a conductive polymer and a carbon material prepared by sputtering and blade coating.
6. The flexible electrode according to claim 1, characterized in that the size of the detection hole (5) is smaller than the size of the electrode detection point (4).
7. The flexible electrode according to claim 1, characterized in that the circuit (1) and the electrode detection points (4) are of a single-channel structure or a multi-channel high-density structure.
8. The method for manufacturing a flexible electrode according to any one of claims 1 to 7, comprising the steps of,
the method comprises the following steps: preparing an electrode substrate (2), and respectively preparing an adhesion layer (3), a circuit (1) and electrode detection points (4) on two opposite sides of the electrode substrate (2);
step two: a detection hole (5) is formed in the position of the electrode detection point (4), and the detection hole (5) penetrates through the whole electrode substrate (2) and the adhesion layer (3);
step three: and coating a conductive gel (6) at the position of the detection hole (5), and enabling the conductive gel (6) to be in contact with the conductive layer of the electrode detection point (4) to obtain the flexible electrode.
9. The method for preparing a flexible electrode according to claim 8, further comprising, after the third step,
step four: an insulating layer (7) is prepared on the side of the polar substrate having the circuit (1) and the electrode detection points (4).
10. Use of a flexible electrode according to any one of claims 1 to 7 in the field of body surface detection.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211592975.9A CN115919320A (en) | 2022-12-13 | 2022-12-13 | Flexible electrode and preparation method and application thereof |
| PCT/CN2023/133773 WO2024125259A1 (en) | 2022-12-13 | 2023-11-23 | Flexible electrode, preparation method therefor, and use thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211592975.9A CN115919320A (en) | 2022-12-13 | 2022-12-13 | Flexible electrode and preparation method and application thereof |
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| CN115919320A true CN115919320A (en) | 2023-04-07 |
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| CN202211592975.9A Pending CN115919320A (en) | 2022-12-13 | 2022-12-13 | Flexible electrode and preparation method and application thereof |
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| WO (1) | WO2024125259A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024125259A1 (en) * | 2022-12-13 | 2024-06-20 | 中国科学院深圳先进技术研究院 | Flexible electrode, preparation method therefor, and use thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI312674B (en) * | 2006-11-08 | 2009-08-01 | Ind Tech Res Inst | A bio-monitoring apparatus |
| JP5330259B2 (en) * | 2006-12-07 | 2013-10-30 | コーニンクレッカ フィリップス エヌ ヴェ | Handheld repositionable ECG detector and method for acquiring ECG data |
| CN208511019U (en) * | 2018-01-15 | 2019-02-19 | 上海华舟压敏胶制品有限公司 | Cardioelectric monitor electrode slice |
| CN209003991U (en) * | 2018-08-01 | 2019-06-21 | 苏州小蓝医疗科技有限公司 | A kind of patch type ECG Gathering System |
| CN109124618A (en) * | 2018-09-20 | 2019-01-04 | 深圳乐普智能医疗器械有限公司 | Sensor attachment and bioelectrical signals measuring system |
| CN211409061U (en) * | 2019-11-20 | 2020-09-04 | 珠海市美浩科技有限公司 | Paster type electrocardio collector |
| CN215687917U (en) * | 2021-08-23 | 2022-02-01 | 上海越光医疗科技有限公司 | Paster type electrocardiogram detector |
| CN115919320A (en) * | 2022-12-13 | 2023-04-07 | 中国科学院深圳先进技术研究院 | Flexible electrode and preparation method and application thereof |
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- 2022-12-13 CN CN202211592975.9A patent/CN115919320A/en active Pending
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2024125259A1 (en) * | 2022-12-13 | 2024-06-20 | 中国科学院深圳先进技术研究院 | Flexible electrode, preparation method therefor, and use thereof |
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| WO2024125259A1 (en) | 2024-06-20 |
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