▎ 摘　　要

NOVELTY - Pervaporation film comprises polymer matrix, and graphene oxide nanosheets dispersed in the polymer matrix, where the graphene oxide nanosheets comprising hydrophilic functional groups. The graphene oxide nanosheets are oriented along the thickness direction of the film. USE - Pervaporation film used in azeotrope and near-boiler separation, trace water removal, brine desalination and other fields (claimed). ADVANTAGE - The pervaporation film improves permeation flux. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing a pervaporation film, which involves: a. dispersing the graphene oxide nanosheets in a solvent to form a graphene oxide nanosheet dispersion, where the content of graphene oxide nanosheets in the graphene oxide nanosheet dispersion is 0.001-0.7 wt.%; b. adding a polymer matrix to the graphene oxide nanosheet dispersion, stirring and dissolving to form a casting solution; and c. casting the film-casting liquid into a film, placing under the action of an electric field, and drying to obtain a product.