▎ 摘　　要

NOVELTY - Composite pervaporation desalination membrane comprises a separation layer with a separation function and an organic porous base membrane layer that plays a supporting role, where the separation layer comprises polyvinyl alcohol aqueous solution, perfluorosulfonic acid-g-graphene oxide (PFSA-g-GO) nanocomposite and crosslinking agent, the addition of the PFSA-g-GO nanocomposite is 0.2-4.5 %mass, the added amount of the crosslinking agent is 1-10 %mass, and the organic porous base membrane layer is a polyacrylonitrile membrane or a polyethersulfone membrane. USE - The composite pervaporation desalination membrane is used in chemical industry, medicine, seawater desalination and sewage regeneration (claimed), for producing fresh water, where the fresh water is sea water, and for industrial production ethanol ethanol and dehydration. ADVANTAGE - The composite pervaporation desalting membrane is simple and easy to prepare, has low cost, and improves the water flux and desaling rate of the film. The dense film active layer effectively intercepts salt solution in the salt solution, and has good effect when facing the high concentration salt water, and provides a way for the application of the pervaporation membrane in the seawater desalination. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the composite pervaporation desalination membrane.