CN117224127A - Conductive film and preparation method and application thereof - Google Patents
Conductive film and preparation method and application thereof Download PDFInfo
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- CN117224127A CN117224127A CN202210641727.2A CN202210641727A CN117224127A CN 117224127 A CN117224127 A CN 117224127A CN 202210641727 A CN202210641727 A CN 202210641727A CN 117224127 A CN117224127 A CN 117224127A
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- 238000002360 preparation method Methods 0.000 title abstract description 17
- 239000006258 conductive agent Substances 0.000 claims abstract description 27
- 239000013543 active substance Substances 0.000 claims abstract description 21
- 239000002904 solvent Substances 0.000 claims abstract description 17
- 239000004020 conductor Substances 0.000 claims abstract description 16
- 239000002086 nanomaterial Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 10
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 9
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 claims description 8
- 229920000144 PEDOT:PSS Polymers 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 239000004471 Glycine Substances 0.000 claims description 4
- 229920004890 Triton X-100 Polymers 0.000 claims description 4
- 239000013504 Triton X-100 Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 239000002041 carbon nanotube Substances 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 3
- 238000010907 mechanical stirring Methods 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 2
- 239000000463 material Substances 0.000 abstract description 9
- 239000002994 raw material Substances 0.000 abstract description 5
- 239000000853 adhesive Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000035790 physiological processes and functions Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 208000024827 Alzheimer disease Diseases 0.000 description 1
- 208000014644 Brain disease Diseases 0.000 description 1
- 238000005481 NMR spectroscopy Methods 0.000 description 1
- 208000018737 Parkinson disease Diseases 0.000 description 1
- 229920001609 Poly(3,4-ethylenedioxythiophene) Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000036982 action potential Effects 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000003542 behavioural effect Effects 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 230000007177 brain activity Effects 0.000 description 1
- 210000000170 cell membrane Anatomy 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002567 electromyography Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004118 muscle contraction Effects 0.000 description 1
- 230000004770 neurodegeneration Effects 0.000 description 1
- 208000015122 neurodegenerative disease Diseases 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 210000004761 scalp Anatomy 0.000 description 1
Classifications
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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
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L29/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
- C08L29/02—Homopolymers or copolymers of unsaturated alcohols
- C08L29/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Biophysics (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
- Electrotherapy Devices (AREA)
Abstract
The invention provides a conductive film, which relates to the technical field of biomedical conductive materials and comprises a flexible body, wherein an active agent and a conductive agent are dispersed in the flexible body, and the mass ratio of the flexible body to the active agent to the conductive agent is 0.2-1.8:0.05-1.8. The invention also provides a preparation method and application of the conductive film. The conductive film is prepared from the raw materials of flexible materials, the active agent, the conductive agent and the solvent, the flexible materials can realize the flexibility of the dry electrode, and the conductive materials adopt the organic conductive materials and the conductive nano materials to construct a conductive network, so that the conductivity is greatly improved, and the technical problems of high impedance and difficult flexibility of the conventional dry electrode are solved.
Description
Technical Field
The invention relates to the technical field of biomedical conductive materials, in particular to a conductive film, a preparation method and application thereof.
Background
The physiological state of the person can be known by acquiring and analyzing the physiological signals, and the method can be applied to disease diagnosis and treatment. Physiological electrical signals are one of the most important signals of a living organism. It is caused by the difference in ion concentration inside and outside the cell membrane. In a stationary state of the living body, a stationary potential is generated, and when an action occurs, an action potential is generated. Each potential is generated in relation to physiological state and behavioral changes. Therefore, it is important to accurately, real-time and efficiently detect physiological electrical signals.
Common techniques include electrocardio, myoelectricity, electroencephalogram, and the like. The electrocardiogram can help the group doctor to know the beating condition of the heart. Electromyography is caused by muscle contraction and can help the disabled person to recover part/all of the activity. Electroencephalogram is useful for brain activities and brain diseases, such as neurodegenerative diseases like Alzheimer's disease, parkinson's disease, etc.
Common electrical signal acquisition systems include electrodes, signal amplifiers and transducers, signal processors and displays. The electrode is a core component, the main function is to collect the electric signals of the scalp, and the electrode has a very important position. Common electrodes are wet and dry electrodes. The wet electrode needs to be smeared between the electrode and the skin, has the defect of long electrode preparation time, and can lead to signal quality reduction after the conductive adhesive is dried in the test process; and the wet electrode is not easy to portable, and the use scene is greatly limited. The existing dry electrode has high contact impedance with skin and is not easy to be flexible. Therefore, the wet electrode has more excellent performance than the dry electrode, but the preparation process and the use method of the wet electrode are complicated; whereas dry electrodes are more convenient in the preparatory phase of the experiment, but the signal quality is slightly worse than wet electrode signals.
The biggest problem of electroencephalogram is anti-interference capability, which determines the complexity of the environment, and secondly, the properties of the electrodes can be selected according to the test environment. If the surrounding environment is noisy, such as outdoors or under sports, the electroencephalogram with shielding technology can be selected, so that the signal quality can be greatly improved, and the signal artifact can be reduced; if the conditions are special, such as nuclear magnetic resonance, the brain electricity containing the nonmetallic electrode is selected; if it is desired to shorten the preparation time of the experiment, a dry electrode is selected which can greatly reduce the preparation time before the experiment, but the signal quality is slightly poorer than that of the signal acquired by a wet electrode.
In view of this, a conductive film and a preparation method thereof are needed to be researched, and the conductive film is applied to the preparation of biomedical dry batteries so as to solve the technical problems of high impedance and difficult flexibility of the existing dry electrodes.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art, and provides a conductive film, a preparation method and application thereof, wherein the conductive film comprises a flexible body, an active agent and a conductive agent are dispersed in the flexible body, the conductive film is prepared from flexible materials, the active agent, the conductive agent and a solvent, the flexible materials are adopted to realize the flexibility of a dry electrode, and the conductive agent adopts organic conductive materials and inorganic conductive nano materials to construct a conductive network, so that the conductivity is greatly improved, and the technical problems of high impedance and difficult flexibility of the conventional dry electrode are solved.
The aim of the invention can be achieved by the following technical measures:
the invention provides a conductive film, which comprises a flexible body, wherein an active agent and a conductive agent are dispersed in the flexible body, and the mass ratio of the flexible body to the active agent to the conductive agent is 0.2-1.8:0.05-1.8.
Further, the flexible body is made of PVA.
Further, the active agent is at least one of Triton X-100, EG, DMSO, THF and glycine.
Further, the conductive agent includes an organic conductive material and an inorganic conductive nanomaterial;
the organic conductive material is PEDOT: PSS or WPU;
the inorganic conductive nano material is any one of AgNW, CNTs and graphene.
Further, the conductive agent is composed of PEDOT: PSS and AgNW.
The invention also provides a preparation method of the conductive film, which comprises the following steps:
s1: fully mixing the flexible body, the active agent and the conductive agent in proportion;
s2: adding a certain amount of solvent, stirring and forming gel;
s3: and curing the gel to obtain the conductive film.
Further, the mixing in step S1 is a stirring mixing, and the stirring mixing is a manual stirring or a mechanical stirring mixing.
Further, in the step S2, the solvent is a volatile solvent, the volatile solvent is water or ethanol, and the dosage is 10-500mL;
the gel reaction time in the step S2 is 0-48h.
Further, the curing temperature in the curing process in the step S3 is 30-150 ℃ and the curing time is 1-48h.
The invention also provides an application of the conductive film or the conductive film prepared by the method in a biomedical dry electrode or dry battery or an electric signal acquisition system.
The conductive film comprises a flexible body, wherein an active agent and a conductive agent are dispersed in the flexible body, the conductive film is prepared from raw materials of flexible materials, the active agent, the conductive agent and a solvent, the flexible materials can realize the flexibility of a dry electrode, the conductive agent adopts organic conductive materials and inorganic conductive nano materials to construct a conductive network, the conductivity is greatly improved, the technical problem of high impedance of the existing dry electrode is solved, the conductive film can be used for preparing the flexible self-adhesive dry electrode, and the conductive film has the advantages of flexibility and low resistance, can be widely applied to the field of biomedical engineering, and has low raw material cost. The preparation method of the conductive film is simple and easy to operate.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a photograph of a sample of the conductive film of example 1 of the present invention;
FIG. 2 is a schematic diagram showing the process of preparing a conductive film according to example 1 of the present invention;
FIG. 3 is a photograph showing the thickness and resistance test site of a conductive film sample prepared in example 1 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In order that the present disclosure may be more fully described and fully understood, the following description is provided by way of illustration of embodiments and specific examples of the present invention; this is not the only form of practicing or implementing the invention as embodied. The description covers the features of the embodiments and the method steps and sequences for constructing and operating the embodiments. However, other embodiments may be utilized to achieve the same or equivalent functions and sequences of steps.
The invention provides a conductive film, which comprises a flexible body, wherein an active agent and a conductive agent are dispersed in the flexible body, and the mass ratio of the flexible body to the active agent to the conductive agent is 0.2-1.8:0.05-1.8.
The flexible body is made of PVA, preferably PVA, and has low cost.
Such agents include, but are not limited to, triton X-100, EG, DMSO, THF and Glycine (GLY), preferably EG, to increase the dispersibility of the conductive material and enhance film conductivity.
The conductive agent comprises an organic conductive material and an inorganic conductive nano material; the organic conductive material includes, but is not limited to, PEDOT: PSS and WPU; the inorganic conductive nanomaterials include, but are not limited to AgNW, CNTs, and graphene. The conductive material adopts an organic conductive material and an inorganic conductive nano material to construct a conductive network, so that the conductivity is greatly improved. Preferably, the conductive agent consists of PEDOT: PSS and AgNW, PEDOT: PSS is an aqueous solution of a high-molecular polymer, and has higher conductivity.
The solvent is a volatile solvent, and the dosage is preferably 10-500mL. The volatile solvents include, but are not limited to, water and ethanol, preferably water, which can further reduce the cost of preparation.
The invention also provides a preparation method of the conductive film, which comprises the following steps:
s1: fully mixing the flexible body, the active agent and the conductive agent in proportion;
s2: adding a certain amount of solvent, stirring and forming gel;
s3: and curing the gel to obtain the conductive film.
Wherein, the mixing treatment in the step S1 may be stirring and mixing, including, but not limited to, manual stirring and mechanical stirring and mixing. The gel reaction time in the step S2 is 0-48h. The curing temperature in the curing process in the step S3 is 30-150 ℃, the curing time is 1-48h, and the curing mode comprises but is not limited to heating by adopting a resistance wire.
The invention also provides an application of the conductive film or the conductive film prepared by the method in a biomedical dry electrode or a dry battery or an electric signal acquisition system, which can solve the technical problems of high impedance and difficult flexibility of the existing dry electrode.
Example 1
As shown in fig. 1-3, a conductive film is prepared from PVC as a flexible material, EG as an active agent, and PEDOT: PSS and AgNW, wherein the solvent is water, and the preparation process is as follows:
s1: 1.2g PEDOT was measured: PSS is added with 0.3gEG, stirred and mixed uniformly, then 1.5g of PVC, 2.1g of AgNW and 0.0525g of Triton X-100 are added, and stirred fully for 30min and mixed uniformly;
s2: adding 5mL of water, and stirring for 60min to form gel;
s3: and curing the gel at 45 ℃ for 18 hours, and removing the film to obtain a conductive film sample.
As shown in fig. 3, the thickness of the conductive film sample prepared in this embodiment is 0.187mm, and the resistance is 43.0 Ω, but the resistance of the common conductive film is as high as 150Ω, and the resistance of the conductive film in this embodiment is far lower than that of the common conductive film, which has obvious advantages.
The conductive film comprises a flexible body, wherein an active agent and a conductive agent are dispersed in the flexible body, the conductive film is prepared from raw materials of flexible materials, the active agent, the conductive agent and a solvent, the flexible materials can realize the flexibility of a dry electrode, the conductive agent adopts organic conductive materials and inorganic conductive nano materials to construct a conductive network, the conductivity is greatly improved, the technical problem of high impedance of the existing dry electrode is solved, the conductive film can be used for preparing the flexible self-adhesive dry electrode, and the conductive film has the advantages of flexibility and low resistance, can be widely applied to the field of biomedical engineering, and has low raw material cost. The preparation method of the conductive film is simple and easy to operate.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
1. The conductive film is characterized by comprising a flexible body, wherein an active agent and a conductive agent are dispersed in the flexible body, and the mass ratio of the flexible body to the active agent to the conductive agent is 0.2-1.8:0.05-1.8.
2. The conductive film according to claim 1, wherein the flexible body is made of PVA.
3. The conductive film of claim 1, wherein the active agent is at least one of Triton X-100, EG, DMSO, THF and glycine.
4. The conductive film according to claim 1, wherein the conductive agent comprises an organic conductive material and an inorganic conductive nanomaterial;
the organic conductive material is PEDOT: PSS or WPU;
the inorganic conductive nano material is any one of AgNW, CNTs and graphene.
5. The conductive film according to claim 4, wherein the conductive agent is composed of PEDOT: PSS and AgNW.
6. A method for producing the conductive film according to claim 1, comprising the steps of:
s1: fully mixing the flexible body, the active agent and the conductive agent in proportion;
s2: adding a certain amount of solvent, stirring and forming gel;
s3: and curing the gel to obtain the conductive film.
7. The method according to claim 6, wherein the step S1 is performed by stirring, and the stirring is performed by manual stirring or mechanical stirring.
8. The conductive film according to claim 6, wherein the solvent in the step S2 is a volatile solvent, the volatile solvent is water or ethanol, and the amount is 10-500mL;
the gel reaction time in the step S2 is 0-48h.
9. The method of manufacturing a conductive film according to claim 6, wherein the curing temperature of the curing process in step S3 is 30-150 ℃ and the curing time is 1-48 hours.
10. Use of a conductive film according to any one of claims 1-5 or a conductive film prepared by a method according to any one of claims 6-9 in biomedical dry electrodes or dry cells or electrical signal acquisition systems.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210641727.2A CN117224127A (en) | 2022-06-08 | 2022-06-08 | Conductive film and preparation method and application thereof |
| PCT/CN2022/137733 WO2023236475A1 (en) | 2022-06-08 | 2022-12-08 | Conductive thin film, method for preparing same, and use thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210641727.2A CN117224127A (en) | 2022-06-08 | 2022-06-08 | Conductive film and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117224127A true CN117224127A (en) | 2023-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210641727.2A Pending CN117224127A (en) | 2022-06-08 | 2022-06-08 | Conductive film and preparation method and application thereof |
Country Status (2)
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| CN (1) | CN117224127A (en) |
| WO (1) | WO2023236475A1 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PT104882A (en) * | 2009-12-11 | 2011-06-14 | Univ Aveiro | A DRY AND ACTIVE ELECTRODE FOR BIO-SIGNS USING AS AN INTERFACE MATERIAL AN ORGANIC-INORGANIC HYBRID |
| CN110240714A (en) * | 2019-06-26 | 2019-09-17 | 武汉工程大学 | A kind of polyvinyl alcohol based conductive hydrogel and its preparation method and application |
| CN110338781A (en) * | 2019-07-23 | 2019-10-18 | 广西师范大学 | A kind of dry electrode of nonmetal flexible and preparation method thereof |
| CN112679753A (en) * | 2020-12-04 | 2021-04-20 | 中国科学院深圳先进技术研究院 | Super-soft conductive self-healing hydrogel and preparation method and application thereof |
| CN113100773A (en) * | 2021-04-12 | 2021-07-13 | 中国科学院深圳先进技术研究院 | Method for preparing fiber membrane dry electrode by directly spinning on skin |
| CN114392362A (en) * | 2022-01-28 | 2022-04-26 | 电子科技大学 | Smearing type low-impedance electrocardio-electrode material and preparation and use methods thereof |
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2022
- 2022-06-08 CN CN202210641727.2A patent/CN117224127A/en active Pending
- 2022-12-08 WO PCT/CN2022/137733 patent/WO2023236475A1/en unknown
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| WO2023236475A1 (en) | 2023-12-14 |
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