▎ 摘　　要

NOVELTY - Preparation of polyimide/modified graphene oxide composite material comprises dissolving graphene oxide and functionalized small molecules in N,N-dimethylformamide, stir-reacting under nitrogen atmosphere, vacuum filtering, washing, and drying to obtain modified graphene oxide, where functionalized small molecule is N,N'-di-(4,6-dichloro-(1,3,5)-triazinyl)-hexanediamine; and dispersing in N,N-dimethylformamide, adding 4,4'-diaminodiphenyl ether, mixing, adding pyromellitic dianhydride, stir-reacting under nitrogen atmosphere, molding to evaporate to organic solvent, and gradually heating for thermal imidization. USE - Method for preparing polyimide/modified graphene oxide composite material. ADVANTAGE - The composite material has enhanced raw materials compatibility and improved mechanical, electrical, and thermal performance.