▎ 摘　　要

NOVELTY - A nanoparticle/graphene composite material comprises hydroxyl group and epoxy group on surface of graphene oxide, which are simultaneously modified by using silane coupling agent and nanoparticles. USE - Nanoparticle/graphene composite material used in composite material applications and anticorrosive coating material. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation method of nanoparticle/graphene composite material, which involves (i) using natural flake graphite as raw material, and preparing graphene oxide through improved Hummers method, (ii) dispersing nanoparticles into amino silane coupling agent-containing ethanol with volume fraction of 2%, ultrasonically dispersing for 2 hours, dripping deionized water in a water bath at 90 degrees C, reacting for 10 hours, washing the resulting product three times with absolute ethanol and deionized water respectively, and freeze-drying to obtain functionalized nanoparticles, (iii) dispersing graphene oxide in ethanol solution containing epoxy silane coupling agent in a volume fraction of 2%, ultrasonically dispersing for 2 hours, dripping deionized water in water bath at 90 degrees C, reacting for 10 hours, washing the resulting product three times with absolute ethanol and deionized water respectively, and freeze-drying to obtain functionalized graphene oxide, (iv) adding functionalized graphene oxide to N,N-dimethylformamide, ultrasonically processing for 2 hours, adding functionalized nanoparticles, ultrasonically processing for 2 hours, carrying out reaction in an oil bath at 90 degrees C for 12 hours to obtain mixed solution, (v) adding reducing agent in the mixed solution, washing the resulting product three times with absolute ethanol and deionized water respectively, and freeze-drying to obtain nanoparticle/graphene composite material.