▎ 摘　　要

NOVELTY - Preparing composite material by modifying graphene oxide comprises preparing graphene oxide by chemical oxidation, preparing graphene oxide into graphene thermal reduction, preparing iron oxide (Fe3O4) nanoparticle, adding polyaniline coated ureaformaldehyde resin Fe3O4 nanoparticle core-shell structure and Fe3O4, mixing N-methyl pyrrolidone solution and polyvinyl chloride, stirring and dispersing polyvinyl chloride, graphite and polyaniline coated ureaformaldehyde resin Fe3O4 nanoparticle material and placing the mixed solution into a mold and then drying in vacuum. USE - The method is useful for preparing composite material (claimed). ADVANTAGE - The method allows easy preparation of the composite material with high magnetic conductivity. DETAILED DESCRIPTION - Preparing composite material by modifying graphene oxide comprises (a) preparing graphene oxide by chemical oxidation, (b) preparing graphene oxide into graphene thermal reduction at high temperature, (c) preparing iron oxide (Fe3O4) nanoparticle by co-precipitation method, (d) adding polyaniline coated ureaformaldehyde resin Fe3O4 nanoparticle core-shell structure and Fe3O4 according to mass ratio of 1:2:1 by in-situ polymerization, (e) mixing N-methyl pyrrolidone solution and polyvinyl chloride (25 mass%), adding graphite, polyaniline coated urea-formaldehyde resin Fe3O4 core-shell structure nanoparticle material, adding obtained solution to normal temperature, mechanically stirring and dispersing polyvinyl chloride, graphite and polyaniline coated ureaformaldehyde resin Fe3O4 nanoparticle material according to mass ratio of 0.5:1:25, and (f) placing the mixed solution into a mold and then drying in vacuum.