▎ 摘　　要

NOVELTY - Producing polyvinyl alcohol grafted graphene oxide, comprises (a) dispersing graphene oxide in solvent, and (b) adding grafting reaction material and polyvinyl alcohol to the solvent, and mixing. USE - The method is useful for producing polyvinyl alcohol grafted graphene oxide as barrier film (all claimed). ADVANTAGE - The barrier film exhibits visible light transmittance of 90.1%, 85.4% and 83.8% and oxygen permeability of 0.984, 0.245 and 0.025 cc/m2x day when the polyvinyl alcohol grafted graphene oxide contents is 0.1, 0.2 and 0.3 wt.%, respectively. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for barrier film obtained by coating a solution prepared by dissolving polyvinyl alcohol and the polyvinyl alcohol grafted graphene oxide in polyvinyl alcohol aqueous solution, and performing solvent casting process.