▎ 摘　　要

NOVELTY - The preparation of composite material involves preparing graphene oxide dispersion liquid, coating aqueous solution of polyethylenimine to surface of filter paper, pouring dispersion liquid into vessel, sealing vessel to obtain graphene oxide thin film, cooling, obtaining three-dimensional porous graphene film, placing porous graphene film into Teflon (RTM: PTFE) mold, weighing epoxy resin, heating, adding hardener, pouring into Teflon (RTM: PTFE) mold three-dimensional porous graphene thin film, penetrating liquid resin into pores of film, and curing sample. USE - Preparation of three-dimensional porous graphene reinforced epoxy resin composite material (claimed). ADVANTAGE - The composite material enhances the performance of epoxy resin. DETAILED DESCRIPTION - The preparation method of three-dimensional porous graphene reinforced epoxy resin composite material involves preparing graphene oxide dispersion liquid, uniformly coating aqueous solution of polyethylenimine to the surface of the filter paper, leaving still for 5 minutes, placing filter paper in a vessel, pouring graphene oxide dispersion liquid in a liquid level of 3-10 mm, into the vessel, sealing vessel into a horizontal shaker at 50-150 rpm for 10-24 hours to obtain graphene oxide thin film with a thickness of 2-4 mm on the surface of filter paper, removing graphene oxide film from the filter surface, adding water in kettle more than the film, tightly placing in oven reactor at 180-220 degrees C for 12-48 hours, taking out from the reactor, cooling to room temperature, obtaining three-dimensional porous graphene film with 2-4 mm thickness, placing three dimensional porous graphene film into Teflon (RTM: PTFE) mold, weighing 20-40 g epoxy resin, placing in oven, heating at 50 degrees C for 0.5-4.0 hours, adding hardener, stirring, pouring into Teflon (RTM: PTFE) mold three-dimensional porous graphene thin film, placing in vacuum oven at 50 degrees C for 1-5 hours, pumping, penetrating liquid resin into the pores of graphene thin film, and curing the sample.