▎ 摘　　要

NOVELTY - Preparing high heat-conducting graphene film involves mechanically crushing the artificial graphite film, until the fineness is less than or equal to 100 meshes to obtain artificial graphite powder. The graphite oxide is mixed in the solvent containing ammonia water, stirred uniformly and then peeled to obtain oxidized graphene, mixed the artificial graphite powder, mixed the oxidized graphene slurry with the peeling agent, stirred uniformly, then performed secondary peeling to obtain mixed slurry, the mass ratio of the oxidized graphene pulp and the artificial graphite powder is 1:0.005-1:0.5, defoamed the mixed slurry, coated on the base material, formed a thickness of 1-10 mm of graphene film, dry processed, peeled off to obtain graphene film crude product, where the temperature of drying is 65-140degrees Celsius. USE - Method for preparing high heat-conducting graphene film used to communication, electronic, aerospace, and medical treatment. ADVANTAGE - The method has high heat conductivity, effectively improves the radiating performance of the material and reduces the cost. DETAILED DESCRIPTION - Preparing high heat-conducting graphene film involves mechanically crushing the artificial graphite film, until the fineness is less than or equal to 100 meshes to obtain artificial graphite powder. The graphite oxide is mixed in the solvent containing ammonia water, stirred uniformly and then peeled to obtain oxidized graphene, mixed the artificial graphite powder, mixed the oxidized graphene slurry with the peeling agent, stirred uniformly, then performed secondary peeling to obtain mixed slurry, the mass ratio of the oxidized graphene pulp and the artificial graphite powder is 1:0.005-1:0.5, defoamed the mixed slurry, coated on the base material, formed a thickness of 1-10 mm of graphene film, dry processed, peeled off to obtain graphene film crude product, where the temperature of drying is 65-140degrees Celsius. The graphene film crude product is placed in inert atmosphere, heated to the first temperature, carbonized for a certain time, placed the product in an inert atmosphere, heated to a second temperature, graphitized for a certain time to obtain the graphene film, laminated and rolled the graphene to reach the preset thickness to obtain product, where the density of the graphene film is greater than or equal to 1.8g/ml.