▎ 摘　　要

NOVELTY - Preparation of graphene oxide composite film involves performing interface modification on a film carrier, obtaining a modified carrier, adding amine monomer to graphene oxide dispersion, ultrasonically dispersing, reacting, obtaining a coating solution, loading the coating solution on the modified carrier under pressure with nitrogen, and drying. USE - Preparation of graphene oxide composite film. ADVANTAGE - The method enables preparation of graphene oxide composite film with adjustable interlayer spacing. The number of oxygen-containing functional groups (hydroxyl groups) on the graphene oxide nanosheets is affected by changing the drying temperature using simple thermodynamics, to realize the purpose of controlling the graphene oxide interlayer structure, and influence the pure water permeation flux and salt rejection performance of the graphene oxide composite film.