▎ 摘　　要

NOVELTY - Preparing a high thermal conductivity graphene composite film, comprises mixing graphene oxide and carbon nanotubes in a solvent to obtain a homogeneous mixture, conducting a hydrothermal reaction under sealed conditions to obtain a hydrogel, freeze-drying the hydrogel to obtain an aerogel, subjecting the aerogel to thermal compression to form a film, annealing and heat treating the film. USE - High heat-conducting graphene composite film. ADVANTAGE - The hydrothermal reaction can effectively realize the uniform dispersion of the carbon nano-tube, forming a three-dimensional structure of graphene sheet and carbon nano tube cross-linking, by applying external force, the freezing and drying of the graphene-carbon nano tube gas gel into thin film, which is a new method for preparing high heat-conducting film. The prepared film performance is better than the film prepared by the traditional method, the film has good flexibility, after the subsequent high temperature heat treatment, it can effectively repair the defect graphene improve the conductivity and thermal conductivity of the film. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing the composite film with high thermal conductivity graphene. DESCRIPTION OF DRAWING(S) - The drawing shows a flow chart of the preparation process of a preparation method of composite film with high heat conductivity and graphene.