▎ 摘　　要

NOVELTY - Preparing graphene composite film material, comprises mixing the graphene powder with the dispersing agent to obtain the precursor slurry, coating the precursor slurry on the hydrophobic substrate for drying and forming film, stripping to obtain graphene film, and covering the medium film on the surface of the graphene film. The dispersing agent comprises graphene oxide aqueous solution and aqueous polyacrylic acid emulsion. The dielectric film includes a flexible polydimethyl siloxane film and a polyvinylalcohol film. USE - The method is useful for preparing graphene composite film material is useful for wave-absorbing material in the actual application needs to be present in a specific form. ADVANTAGE - The graphene composite film material has excellent wave-absorbing performance. The graphene oxide has excellent dispersibility in water, so that the graphene crosslinked by ?-? conjugated function also exhibits excellent dispersible in water. The polyacrylic acid emulsion has amphiphilic properties, which is not only easy to dissolve in water but also can be used as dispersion carrier of the graphite, finally making the graphene exhibit excellent dispersability in the aqueous polypropionic acid emulsions, so as to disperse uniformly precursor slurry, further mutually connected to form an electromagnetic wave transmission path in the precursor liquid curing film forming process, providing path for continuous transmission and loss of incident electromagnetic wave in the material, avoiding the incident wave strong reflection phenomenon caused by graphene agglomeration. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a graphene composite film material. DESCRIPTION OF DRAWING(S) - The drawing shows a flow diagram of the preparing graphene composite film material. (Drawing includes non-English language text).