▎ 摘　　要

NOVELTY - Preparation of modified graphene composite material comprises adding oxidant into graphite powder, conducting oxidation reaction to obtain graphite oxide, ultrasonically processing to obtain graphene oxide, subjecting to surface modification with piperazinylpropylmethyldimethoxysilane to obtain modified graphene, dispersing in acetone, adding epoxy resin, reacting, and obtaining epoxy resin/graphene oxide nanocomposite material. USE - Preparation of modified graphene composite material i.e. epoxy resin/graphene oxide nanocomposite material (claimed). ADVANTAGE - The method provides modified graphene composite material, which has high thermal stability and wider application field.