A kind of preparation method of self-adhesive conductive hydrogel used as electrode

Abstract

A method for preparing a self-adhesive conductive hydrogel used as an electrode. Firstly, polyphenols and their derivatives and a conductive polymer monomer are dissolved in an ethanol solvent, and then an oxidant is added for oxidative polymerization to prepare conductive nanoparticles; Graft polyphenols and their derivatives on natural polymers, add the polyphenol-doped conductive nanoparticles prepared above, and form polyphenols and their derivatives again - natural polymers / conductive nanoparticles redox dynamic balance system, and finally the monomer molecules are polymerized into glue through the formation of crosslinking agent, quinone-phenol and initiator in polyphenol and its derivatives to initiate system polymerization. The conductive hydrogel prepared by the present invention adopts a multiple redox doping system, so it has good conductivity; natural polymer chains and synthetic polymer chains are entangled with each other, so the gel matrix has good mechanical properties. In addition, The anionic groups in natural polymers can ionically bond metal ions, which can not only enhance the mechanical strength but also further enhance the conductivity.

Description

technical field [0001] The invention belongs to the technical field of biomaterials, and in particular relates to a preparation method of a self-adhesive conductive hydrogel used as an electrode. Background technique [0002] Natural polymers have excellent biocompatibility, biodegradability, and non-toxicity, making them useful in the biomedical field, but their poor mechanical and conductive properties limit their application range in the field of electrical conduction. Traditional conductive hydrogels have poor mechanical strength due to their simple structure, and additional conditions (such as ultraviolet radiation, auxiliary agents, etc.) The steps are complicated, and these have certain harm to organisms, so that their application is limited. [0003] At present, the conductive polymers commonly used in conductive hydrogels include polythiophenes, polyanilines, and polypyrroles, all of which can be prepared by oxidative polymerization. However, they all have the fol...

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Problems solved by technology

However, they all have the following disadvantages: one is poor processability, insoluble in water and common solvents; the other is that conductive polymers need to be doped to conduct electricity, but the biocompatibility of traditional dopants is too poor, which limits their use. Application in the field of biomedicine; the third is that the conductive polymer formed by oxidative polymerization has a polymerization inhibition effect, making it difficult for the gel monomer to polymerize into a gel

Therefore, it will be difficult to synthesize conductive hydrogels with excellent performance by combining conductive polymers with hydrogels.

[0004] In summary, the traditional conductive polymer doped hydrogel mainly has the following disadvantages: first, the polymerization steps are lengthy and complicated; second, the traditional conductive polymer dopant is a synthetic polymer, which has poor biocompatibility and limits Its application in the field of biomedicine; the third is that the dispersion of conductive polymers in the solution is poor, and the conductive path cannot be formed well in the gel network, thus affecting the conductivity of the gel