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Transparent self-adhesive conductive hydrogel electrode and preparation method thereof

A conductive hydrogel and self-adhesive technology, which can be used in sensors, diagnostics, applications, etc., can solve the problems that hydrogel electrodes cannot meet biocompatibility, high transparency and high adhesion at the same time, and achieve good biocompatibility Sexuality, high transparency, low price effect

Active Publication Date: 2021-07-23
白硕
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a transparent self-adhesive conductive hydrogel electrode and its preparation method, so as to solve the problem that the current hydrogel electrode cannot satisfy good biocompatibility, high transparency and high adhesion at the same time. The gel electrode is mainly composed of polyvinyl alcohol (PVA), polyvinylpyrrolidone (PVP) and polydopamine nanodots (PDA NDs). The material itself has good biocompatibility; among them, PVA and PVP are generated by acid catalysis under heating conditions. The ketal reaction forms covalent cross-linking sites, thereby constituting the backbone network of the entire hydrogel, and this process does not involve toxic and harmful organic reagents, initiators, and cross-linking agents; where PDA NDs are treated by hydrogen peroxide / sodium hydroxide After polydopamine is obtained, PDA NDs and sodium ions (Na+) together constitute the internal conductive network of the hydrogel; the preparation process of the hydrogel electrode is simple, the material cost is low, and it is suitable for large-scale production

Method used

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  • Transparent self-adhesive conductive hydrogel electrode and preparation method thereof
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  • Transparent self-adhesive conductive hydrogel electrode and preparation method thereof

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preparation example Construction

[0040] The present invention also provides an embodiment of a preparation method of a transparent self-adhesive conductive hydrogel electrode, the preparation method of a transparent self-adhesive conductive hydrogel electrode, and the specific preparation process includes: (1) preparation of the hydrogel ; (2) preparation of hydrogel electrodes;

[0041] (1) The preparation of hydrogel comprises:

[0042] Step 1: adding polyvinyl alcohol (PVA) to deionized water, and dissolving it by heating and stirring to obtain a PVA solution;

[0043]Step 2: adding polyvinylpyrrolidone (PVP) to deionized water, and dissolving with ultrasonic assistance to obtain a PVP solution;

[0044] Step 3: Add dopamine hydrochloride to the slightly alkaline Tris-HCl buffer solution, stir under the open for 12 hours to obtain a PDA solution, and then mix and heat with a mixed solution of hydrogen peroxide and sodium hydroxide to obtain polydopamine nano Dot (PDA NDs) solution;

[0045] Step 4: Mix ...

Embodiment 1

[0053] (1) Preparation of conductive hydrogel:

[0054] Step 1: adding PVA in deionized water, dissolving it by heating and stirring to obtain a PVA solution with a mass concentration percentage of 20%;

[0055] Step 2: Add a certain amount of dopamine hydrochloride to the slightly alkaline Tris-HCl buffer solution, stir under the open for 12 hours to obtain a PDA solution, and then mix and heat with hydrogen peroxide / sodium hydroxide solution until a light Yellow PDA NDs solution;

[0056] Step 3: mix the PVA solution obtained in step 1 with the PDA NDs solution obtained in step 2 in a volume ratio of 1:0.4;

[0057] Step 4: Adjust the pH of the mixed solution obtained in Step 3 to acidic, and heat treatment.

Embodiment 2

[0059] (1) Preparation of conductive hydrogel:

[0060] Step 1: adding PVP in deionized water, and dissolving with ultrasonic assistance, to obtain a PVP solution with a mass concentration percentage of 40%;

[0061] Step 2: Add a certain amount of dopamine hydrochloride to the slightly alkaline Tris-HCl buffer solution, stir under the open for 12 hours to obtain a PDA solution, and then mix and heat with hydrogen peroxide / sodium hydroxide solution until a light Yellow PDA NDs solution;

[0062] Step 3: mix the PVP solution obtained in step 1 with the PDA NDs solution obtained in step 2 in a volume ratio of 1:0.4;

[0063] Step 4: Adjust the pH of the mixed solution obtained in Step 3 to acidic, and heat treatment.

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Abstract

The invention relates to a transparent self-adhesive conductive hydrogel electrode and a preparation method thereof. The electrode comprises a protective film layer, a conductive hydrogel layer and a backing layer, wherein the protective film layer, the conductive hydrogel layer and the backing layer are sequentially arranged from top to bottom; the protective film layer is a polyethylene film, and the conductive hydrogel layer is chemical crosslinking type hydrogel; the hydrogel is obtained by a ketal reaction on polyvinyl alcohol and polyvinylpyrrolidone under a heating condition through acid catalysis, and has a three-dimensional network structure formed by the polyvinyl alcohol and the polyvinylpyrrolidone; and the backing layer is non-woven fabric. The transparent self-adhesive conductive hydrogel electrode provided by the invention has excellent biocompatibility, high transparency and high adhesion, is simple and convenient in preparation process and low in material cost, and is suitable for large-scale production.

Description

technical field [0001] The design of the present invention relates to the technical fields of sensor and bioelectricity collection / stimulation, etc., specifically to a transparent self-adhesive conductive hydrogel electrode, in particular to a high transparency, self-adhesive, and adjustable conductivity and electrode shape conductive hydrogel electrodes. Background technique [0002] With the rapid development of medical technology and people's increasing attention to health issues, the demand for precision medicine and individual medicine is getting higher and higher. Various medical monitoring equipment have begun to enter the daily life of the public, such as blood glucose meters and heart rate monitors. Equipment, muscle rehabilitation training equipment, electronic physiotherapy equipment, etc. Among them, instruments based on bioelectrical signal monitoring are the most widely used. These electrical signals mainly include electroencephalogram (EEG), electromyographic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/259A61B5/266A61B5/28A61B5/291A61B5/296C08J3/075C08J3/24C08L29/04C08L39/06
CPCC08J3/075C08J3/246C08J2339/06C08J2429/04
Inventor 白硕
Owner 白硕
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