▎ 摘　　要

NOVELTY - Producing alkylated graphene oxide, comprises adding graphite and an oxidizing agent into acid solution, stirring the mixed solution, neutralizing the mixed solution, freezing the neutralized mixture solution, drying to obtain graphene oxide powder, and alkylating the obtained graphene oxide powder. USE - The method is useful in producing alkylated graphene oxide for a polymer film (all claimed). ADVANTAGE - The method produces alkylated graphene oxide having excellent dispersibility and stability in simple manner. The polymer film has excellent moisture and gas barrier property. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) alkylated graphene oxide produced using the above method; (2) producing polymer film, comprising dispersing alkylated graphene oxide in organic solvent, adding dispersed alkylated graphene oxide in polymer solution, stirring, coating obtained solution on a film, and drying; and (3) the polymer film produced using the above method.