▎ 摘　　要

NOVELTY - A carboxylated graphene oxide is obtained by carrying out carboxylation modification to graphene oxide or modified graphene oxide. The compound used for carboxylation modification is a aqueous compound containing a carboxyl group. USE - Carboxylated graphene oxide used in polymer film-forming material (claimed). ADVANTAGE - The solid carboxylated graphene oxide can achieve high dispersion in an aqueous solution with a wide pH range, and can be uniformly dispersed in an aqueous polymer film-forming material. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following An application of carboxylated graphene oxide in polymer film-forming material. (1) A preparation of carboxylated graphene oxide, which involves carrying out 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide-N-hydroxysuccinimide (EDC-NHS) catalytic reaction between a diamine compound and graphene oxide to obtain aminated graphene oxide, and performing an EDC-NHS catalytic reaction between a aqueous compound containing a carboxyl group and the aminated graphene oxide.