▎ 摘　　要

NOVELTY - A preparation method of conductive hydrogel comprises (S1) taking gamma-methacryloxypropyltrimethoxysilane, adding diluted hydrochloric acid under stirring at room temperature, continuing the reaction, after the reaction is completed, the polysiloxane prepolymer is obtained by rotary steaming, (S2) adding aniline, graphene oxide, polysiloxane prepolymer and initiator prepared in step (S1) in dimethyl sulfoxide, under nitrogen protection, stirring mechanically, leaving to react, removing the solvent after the reaction, washing the reaction product, filtering it with suction, and drying to obtain a hyperbranched polyaniline-graphene composite, and (S3) adding the hyperbranched polyaniline graphene composite prepared in step (S2), water, cross-linking agent, initiator, accelerator to acrylamide, pouring it into the mold after ultrasonic stirring and forming a film at room temperature. USE - The method is used for preparing conductive hydrogel (claimed). The conductive hydrogel is used in sensors, capacitors, fluid control, and intelligent machinery. ADVANTAGE - The method solves the problems of poor mechanical properties and electrical properties of traditional conductive hydrogel sensors, capacitors, fluid control, and intelligent machinery. The hyperbranched polysiloxane prepolymer has stable performance, little dosage, uniform distribution in the acrylamide hydrogel, and improved conductivity and mechanical property. DETAILED DESCRIPTION - A preparation method of conductive hydrogel comprises (S1) taking γ-methacryloxypropyltrimethoxysilane, adding diluted hydrochloric acid under stirring at room temperature, continuing the reaction at 30-60℃ for 4-6 hours, after the reaction is completed, the polysiloxane prepolymer is obtained by rotary steaming, and the molar ratio of water and siloxane is controlled to be 1.1-1.5:1, (S2) adding aniline, graphene oxide, polysiloxane prepolymer and initiator prepared in step (S1) in dimethyl sulfoxide, under nitrogen protection, stirring mechanically at 30-60℃, leaving for 12-24 hours to react, removing the solvent after the reaction, washing the reaction product, filtering it with suction, and drying to obtain a hyperbranched polyaniline-graphene composite, where the mass ratio of the added aniline, graphene oxide and polysiloxane prepolymer is (1-10):(1-10):(0.1-1), and (S3) adding the hyperbranched polyaniline graphene composite prepared in step (S2), water, cross-linking agent, initiator, accelerator to acrylamide, pouring it into the mold after ultrasonic stirring and forming a film at room temperature, where the mass ratio of acrylamide, hyperbranched polyaniline graphene composite, and water added is (1-5):(0.01-0.1):(10-20).