▎ 摘　　要

NOVELTY - Graphene oxide slurry with high solid content, comprises solvent, graphene oxide and amino acid, where the solid content of the graphene oxide is 5-13 wt.%. USE - Graphene oxide slurry with high solid content used for preparing amino acid modified graphene oxide film (claimed). ADVANTAGE - The graphene oxide slurry reduces viscosity of the graphene oxide slurry under the condition of higher content of graphene oxide, improves castability of graphene oxide slurry and reduces efficiency of graphene oxide film prepared from graphene oxide slurry. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: A method for preparing high-solid-content graphene oxide slurry, which involves adding amino acid into graphene oxide dispersion liquid, and then uniformly dispersing to obtain the graphene oxide slurry with high solid content. An amino acid-modified graphene oxide film, which comprises graphene oxide and an amino acid in mass ratio of 100: (3-6), preferably, the graphene oxide film has a thickness of 100-200 μm, preferably 150 μm. A method for preparing amino acid modified graphene oxide film, which involves: preparing a high-solid-content graphene oxide slurry, and coating the graphene oxide slurry on a substrate, drying and stripping.