▎ 摘　　要

NOVELTY - Low-viscosity graphene oxide slurry, comprises graphene oxide slurry having solid content of 5-10%, and viscosity of 10000-50000 mPa-s. USE - The graphene oxide film is useful in sensor element, photoelectric, energy material. ADVANTAGE - The method has super micronizing ultra-fine graphene oxide under high pressure shearing, high-speed impact and strong cavity action to reduce size of graphene oxide, reduces viscosity of graphene oxide slurry and increases solid content of graphene oxide slurry, and improves efficiency of coating the graphene oxide slurry to become a graphene oxide film; slurry has super-large specific surface area, high conductivity, excellent chemical stability and thermodynamic stability, and physical performance and mechanical performance; improves the coating efficiency to more than 300%, and is suitable for industrial mass production. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing low-viscosity graphene oxide slurry, comprising mixing graphene oxide with a solvent, dispersing and superfine thinning to reduce the average sheet diameter of the graphite oxide to obtain a low-viscosity graphene oxide slurry; (2) graphene oxide film, comprising graphene oxide having an average sheet diameter of 2-3 m; (3) preparing graphene oxide film, comprising preparing low-viscosity graphene oxide slurry after defoaming treatment, coating the degassed graphene oxide slurry on the surface of the substrate, drying and peeling off to obtain a graphene oxide film; (4) graphene thermal conductive film, comprising thermal conductivity of the graphene thermally conductive film is 1000-1600 W/m-K, preferably 1500 W/m-K, preferably density of the graphene thermally conductive film is 1.5-2.2 g/cm3, preferably 2 g/cm3, thickness of graphene thermally conductive film is 10-150 mu m, preferably 40 mu m; and (5) preparing graphene thermal conductive film, comprising obtaining graphene oxide film and graphene thermal conductive film by heat treatment and calendaring, preferably temperature of the heat treatment is 1000-3000 degrees C, preferably 2000 degrees C, density of the graphene oxide film after heat treatment is 0.1-1 g/cm3, preferably 0.3 g/cm3, and calendering pressure is 50-200t, preferably 100t. DESCRIPTION OF DRAWING(S) - The drawing shows a step diagram for graphene oxide (Drawing includes non-English language text).