▎ 摘　　要

NOVELTY - Polyimide graphene composite film prepared by (i) performing polycondensation reaction of dianhydride monomer and diamine monomer to obtain a polyamic acid solution, (ii) adding the graphene oxide powder into the polyamic acid solution, mixing uniformly to obtain mixed solution of polyamic acid and graphene oxide, and (iii) the mixed solution of the polyamic acid and graphene oxide by casting, removing solvent, imidization to obtain the polyimide graphene composite film, where at least one monomer of the dianhydride monomer and the diamine monomer contains naphthalene ring. USE - Used as polyimide graphene composite film. ADVANTAGE - The graphite film has excellent thermal conductivity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for graphite film prepared by carbonizing the polyimide-graphene composite film at 800-1200 degrees C, and graphiteizing at 2800-3000 degrees C.