Electric conduction polymer and synthesis method thereof and electroactive electrode with surface covered with electric conduction polymer

Abstract

The invention relates to electric conduction polymer and a synthesis method thereof and an electroactive electrode with a surface covered with the electric conduction polymer. In the synthesis method for the electric conduction polymer, polybasic acid is used as a doping agent and a cross-linking agent, so that a monomer is polymerized to obtain electric conduction polymer hydrogel, wherein the monomer is at least one of pyrrole or a derivative of the pyrrole, thiophene or a derivative of the thiophene, phenylamine or a derivative of the phenylamine; and the acid group of the polybasic acid comprises a phosphate group or polybasic acid of which each molecule comprises more than two acid groups selected from at least one of a sulfonic acid group, nitroxyl or a carboxylic acid group and which has the molecular weight of less than or equal to 800. The molar ratio of the mole number of the acid group contained in the polybasic acid to the mole number of an electric conduction polymer monomer is preferably 1:12-12:1. The electric conduction polymer obtained by the synthesis method is covered by the surface of the electroactive electrode. The electric conduction polymer has a simple preparation method, and other impurities are not required to be led into the electric conduction polymer. The prepared electric conduction polymer hydrogel has high ionic conductivity, super hydrophilicity and high biological compatibility.

Description

technical field [0001] The invention relates to a conductive polymer and its synthesis method, and an electroactive electrode whose surface is covered with the conductive polymer. Background technique [0002] Since MacDiarmid, Hideki Shirakawa, and Heeger invented conductive polymers and doped these polymers to achieve all-round performance regulation from insulators to metal states, a new field of chemistry and condensed matter physics has been created. In optoelectronics, The fields of electronics and electrochemistry generate a large number of application prospects. Conductive polymers have stable physical and chemical properties, high electrical conductivity, and electron-ion dual carrier conduction mechanism, so they are widely used as electrode materials for electrochemical sensors, energy storage and other devices. In addition, the conductivity of conductive polymers is related to variables such as redox state, pH, etc., and is widely used in smart materials such as...

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Problems solved by technology

[0011] However, all of the above methods without exception introduce impurities or non-functional materials such as metal ions or non-functional polymers

The disadvantage of these methods is that the conductivity, electrochemical activity or biocompatibility of the conductive polymer is reduced, and the detailed analysis is as follows: 1) by conducting the polymer with common hydrogel materials such as polyvinyl alcohol, polyethylene glycol, Chitosan, polyacrylamide, poly 2-hydroxyethyl methyl methacrylate, polyacrylic acid, sodium alginate hydrogel and other composite materials can synthesize biocompatible hydrogels

However, compounding with non-functional hydrogel materials will undoubtedly reduce the conductivity and electrochemical activity of the material, thereby reducing the performance of electrodes and sensors; 2) Interacting the negatively charged polyelectrolyte doped on the conductive polymer with metal ions And the cross-linking method introduces a large amount of metal ion impurities, which reduces the activity of biocompatibility and enzyme; 3) for the method of cross-linking by the amino group and epoxy group on the polyaniline main chain, the conductivity is greatly reduced. Conductivity of polymers

In conclusion, existing synthetic methods cannot meet the application requirements of conductive polymers in biomedical engineering, biobatteries, microbial fuel cells, etc.

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