▎ 摘　　要

NOVELTY - Preparing a graphene/polyamic acid conductive hydrogel involves dispersing graphene oxide in deionized water ultrasonically to obtain a graphene oxide dispersion having a concentration of 2-8mg/mL, adding hydrazine hydrate and ammonia water, and carrying out reduction reaction in an oil bath to obtain a reduced aqueous graphene oxide solution, where ratio of amount of graphene oxide, hydrazine hydrate and ammonia water is 200-800mg:220 mu L:1500 mu L. USE - Method for preparing a graphene/polyamic acid conductive hydrogel. ADVANTAGE - The method enables to prepare a graphene/polyamic acid conductive hydrogel, which has a self-repairing function, electrical conductivity function, repairs damaged portion by simple docking or dripping, low cost, high repairing efficiency, realizes multiple repeated repair functions, and does not reduces electrical conductivity of repaired material. DETAILED DESCRIPTION - The method involves dissolving diamine monomer in a polar solvent, adding a dianhydride monomer, polymerizing it in an ice water bath, adding a co-solvent to continue reaction to obtain a water-soluble polyamic acid solution, pouring water-soluble polyamic acid solution into deionized ice water to obtain a polyamic acid fiber, and then washing and freeze-drying to obtain a water-soluble polyamic acid, where molar ratio of diamine monomer, dibasic anhydride monomer, and co-solvent is 1:1:1. The method involves adding a co-solvent to reduced aqueous graphene oxide solution, ultrasonically dispersing, adding water-soluble polyamic acid, stirring and then dissolving it to obtain a graphene/polyamic acid solution, which is subjected to vacuum drying, standing, aging through a sol-gel process to obtain final product, where mass ratio of graphene and polyamic acid in graphene/polyamic acid solution is 1:50-2:25.