▎ 摘　　要

NOVELTY - Preparing directed assembly graphene involves mixing graphene oxide and an aqueous solvent to obtain an aqueous solution of graphene oxide, and mixing the aqueous solution of graphene oxide and a metal salt soluble in water to obtain an aqueous solution of graphene oxide containing metal ions. The graphene oxide aqueous solution containing metal ions is slowly cooled until the water molecules crystallize into ice, and then freeze-dried to obtain directional assembled graphene oxide. The oriented assembly graphene oxide is treated in a reducing atmosphere for 1-10 hours to obtain oriented assembly graphene loaded with metal nanoparticles. The directed assembly graphene loaded with metal nanoparticles has a three-dimensional layered structure, and there is an interlayer gap between the layers. The metal nanoparticles are riveted into the three-dimensional layered structure of the directed assembly graphene in the directed assembly graphene loaded with metal nanoparticles. USE - Method for preparing directed assembly graphene used for graphene-carbon nanotube composite thermal conductive film (claimed). ADVANTAGE - The method enables to prepare directed assembly graphene, that has the advantages of low cost, high graphene phase compatibility, ultra-high thermal conductivity, and controllable thickness of ultra-high flexibility products. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing graphene-carbon nanotube composite thermal conductive film, whih involves: (A) loading in-situ growth of carbon nanotubes on the directed assembly graphene with metal nanoparticles in the presence of a magnetic field and a carbon source gas, and obtaining directed assembly of graphene-carbon nanotube composite materials loaded with metal nanoparticles; and (B) graphitizing the directed assembled graphene-carbon nanotube composite material loaded with metal nanoparticles at a temperature of 1000-1500 degrees C, and obtaining a graphene-carbon nanotube composite thermal conductive film after rolling, and carbon nanotubes form an overlap between the layers of the oriented graphene assembly and are vertically aligned with the plane of the layered structure of the oriented graphene assembly.