▎ 摘　　要

NOVELTY - Preparation of graphene oxide composite material comprises adding graphene oxide into the beaker, adding deionized water, carrying out ultrasonic dispersion, adding ammonia, stirring, adding hydrazine hydrate, stirring, transferring in oil bath, stirring, cooling, filtering using nylon filter membrane, washing with deionized water and ethanol, drying, dispersing in dimethylformamide, dissolving poly(methyl methacrylate) in dimethylformamide, high speed stirring at room temperature, precipitating in methanol, filtering, washing with hot water and methanol, vacuum drying and hot pressing. USE - Method for preparing graphene oxide composite material (claimed). ADVANTAGE - The method is simple and has reduced production cost and high production efficiency. DETAILED DESCRIPTION - Preparation of graphene oxide composite material comprises adding 600 mg graphene oxide into the beaker, adding 600 mL deionized water, carrying out ultrasonic dispersion for 2 hours to obtain 1 mg/mL graphene oxide dispersion, adding 10 mL ammonia, stirring, adding 1.2 mL hydrazine hydrate, stirring for 30 minutes, transferring in oil bath, stirring until mixture turns to black, cooling, filtering using nylon filter membrane with pore size of 1.2 mu m, washing with deionized water and ethanol, drying at room temperature to obtain reduced graphene oxide nanoparticles, dispersing in dimethylformamide to obtain 1 mg/L dispersion, dissolving poly(methyl methacrylate) in dimethylformamide, pouring reduced graphene and poly(methyl methacrylate) dispersion into mixed solution, high speed stirring at room temperature, precipitating in methanol, filtering the crude product, washing with hot water and methanol, vacuum drying at 60 degrees C to remove residual solvent and hot pressing at 200 degrees C with pressure of 15 MPa.