Preparation method of self-adhesive conducive hydrogel used as electrode

Abstract

A preparation method of self-adhesive conductive hydrogel used as an electrode comprises the following steps: firstly, polyphenol, derivatives of polyphenol and a conductive polymer monomer are dissolved in an ethanol solvent, an oxidizing agent is added for oxidative polymerization, and conductive nanoparticles are prepared; a natural polymer is grafted with polyphenol and derivatives of polyphenol, the prepared polyphenol-doped conductive nanoparticles are added, and a polyphenol and derivative-natural polymer-conductive nanoparticle redox dynamic balance system is formed again; finally, monomer molecules and an initiator form an initiating system through a crosslinking agent and quinone-phenol in polyphenol and derivatives of polyphenol to be polymerized into gel. The conductive hydrogel prepared from the multiple redox doping system has good conductivity; natural polymer chains and synthesized polymer chains entangle each other, so that a gel matrix has good mechanical performance,besides, anionic groups in the natural polymer can perform ionic bonding on metal ions, the mechanical strength can be enhanced, and conductivity can be further enhanced.

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