▎ 摘　　要

NOVELTY - Preparing a two-dimensional ion-pair membrane, comprises adding vinyl-containing acid monomers to the graphene oxide nanosheet dispersion, under the initiation of the initiator, performing the free radical polymerization reaction to obtain the P1-graphene oxide nanosheet dispersion, adding vinyl-containing amine monomers to the graphene oxide nanosheet dispersion, under the initiation of the initiator, performing free radical polymerization reaction to obtain the P2-graphene oxide nanosheet dispersion, mixing the P1-graphene oxide nanosheet dispersion and the P2-graphene oxide nanosheet dispersion and depositing on the porous substrate membrane by nanosheet assembly to obtain a two-dimensional ion-pair membrane. USE - The method for preparing two-dimensional ion-pair membrane useful in desalting (claimed). ADVANTAGE - The film has high salt interception rate of the film, high water flux, and strong controllability of film preparation technique, which is good for mass production. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for two-dimensional ion-pair membrane, obtained by the method as mentioned above.