▎ 摘　　要

NOVELTY - A graphene oxide slurry comprises large-sheet-diameter graphene oxide and small-sheet-diameter graphene oxide. The sheet diameter of the large-diameter graphene oxide is greater than 100 μm. The sheet size of the small-diameter graphene oxide is less than 20 μm. The small-diameter graphene oxide accounts for 10-90% of the total mass of the large-diameter graphene oxide and the small-diameter graphene oxide. USE - Graphene oxide slurry used for preparing graphene heat conduction film (claimed). ADVANTAGE - The method improves dispersibility of the graphene mixed slurry in water by introducing other components and keeping solid content, reduces the viscosity of the slurry under the action of the small-diameter graphene oxide, promotes self-assembly and internal compactness of the graphene oxide in the film forming process, and forms the graphene oxide film with high orientation. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: a graphene heat conducting film which is prepared using the graphene oxide slurry; preparation of the graphene oxide slurry; and preparation of the graphene heat conducting film.