▎ 摘　　要

NOVELTY - A high dielectric constant graphene composite film comprises an elastic matrix and a graphene dielectric filler, the elastic matrix is a polystyrene-polybutyl acrylate-polystyrene triblock copolymer thermoplastic elastomer, the graphene dielectric filler is graphene oxide nanosheets with porous polydopamine on the surface, and the mass ratio of the graphene dielectric filler to the elastic matrix is (0.1-1.2): 100. USE - High dielectric constant graphene composite film. ADVANTAGE - The high dielectric constant graphene composite film has excellent elastic properties, good thermoplasticity and film forming processability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a preparation of the high dielectric constant graphene composite film, which involves adding an aqueous dispersion of graphene dielectric filler to the emulsion of the elastic matrix, fully stirring and mixing to obtain a composite emulsion, pouring the composite emulsion onto a flat plate with a polytetrafluoroethylene surface, drying horizontally to form a film, and then vacuum drying and annealing after the film is formed.