▎ 摘　　要

NOVELTY - Graphene aerogel film has a densified and anisotropic three-dimensional porous network structure. The three-dimensional porous network structure comprises a layered structure, a membrane structure and an ordered honeycomb-shaped pore structure, and the layered structure. The membrane structure and the ordered honeycomb-shaped pore structure are formed by densification and accumulation of graphene aerogel fibers, and the graphene aerogel fibers are obtained by orderly overlapping and assembling graphene sheet layers. USE - Graphene aerogel film used for preparing a flexible graphene aerogel phase-change intelligent film (claimed). ADVANTAGE - The graphene aerogel film realizes heat energy modulation, intelligent heating, heat energy conversion and realized storage. The preparation process is simple, has mild reaction condition, cost-effective, and the method is green and pollution-free. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: A method for preparing graphene aerogel film, which involves arranging graphene aerogel fibers to form graphene aerogel fiber aggregates. The graphene aerogel fiber aggregates are forged to realize the densification and reorganization of the porous network inside the graphene aerogel fibers and the adhesion between the graphene aerogel fibers, to obtain flexible, high-strength densified graphene aerogel films. A flexible graphene aerogel phase-change intelligent film, which comprises graphene aerogel film and a phase-change material. The phase-change material is filled in the dense graphene aerogel film, preferably, the phase-change material comprises paraffin, polyethylene glycol, polyalcohol, fatty alcohol, fatty amine, stearic acid and polyolefin, preferably, the content of the phase-change material in the flexible graphene aerogel phase-change intelligent film is 10-90 wt.%, the thickness of the flexible graphene aerogel phase-change intelligent film is 10-1 mm, preferably 50-300 μm, the phase-change temperature of the flexible graphene aerogel phase-change intelligent film is 10-160℃, and the enthalpy value of the flexible graphene aerogel phase-change intelligent film is 1-240 J/g. When the phase change material is in a solid state or a molten state, the flexible graphene aerogel phase change intelligent film has mechanical flexibility and bent, folded and cut. the flexible graphene aerogel phase change intelligent film has the functions of heat energy modulation, intelligent heating, light-heat conversion and storage and electric heat conversion and storage.