▎ 摘　　要

NOVELTY - A composite film comprises polymer film and organic amine-modified graphene oxide powder arranged in polymer film. The organic amine-modified graphene oxide powder is obtained by attaching organic amine to sheet structure of graphene oxide powder. USE - Composite film for pervaporation and separation of preferred alcohol-soluble butanol/water and ethanol/water system systems with preferential alcohol permeability (all claimed). ADVANTAGE - The composite film vaporizes and separates butanol/water and ethanol/water systems with preferential alcohol permeability, breaks trade-off effect of pervaporation and increases separation factor and permeation flux of pervaporation separation of alcohol/water solution. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of composite film which involves arranging graphene oxide powder in an organic solvent, adding an organic amine, heating to carry out reaction, and centrifuging to obtain an organic amine-modified graphene oxide powder, which is washed and dried, dissolving polymer film material in an organic solvent, heating and stirring to form film material solution, adding organic amine-modified graphene oxide powder to an alcohol solvent to form uniform powder suspension, mixing film material solution with powder suspension, continuing to stir to uniform under heating conditions to form casting solution, leaving to stand still for defoaming, drying casting solution.