▎ 摘　　要

NOVELTY - Preparing solvent-resistance charged composite nanofiltration membrane, comprises e.g. (i) hydrolyzing poly(p-phenylene terephthalamide) (PPTA) by amide to obtain amino-containing nanofiber dispersion, (ii) anchoring initiator 2-bromo-2-methylpropionyl bromide on the surface of graphene oxide by esterification reaction to obtain graphene oxide containing bromine groups, then taking ion-pair structure ionic liquid i.e. 3-(carboxymethyl)-1-(4-vinylbenzyl)-1H-imidazol-3-ium bromide compounds (I) as monomer, and growing polymer on bromine-containing graphene oxide to obtain ion-pair structured ionic liquid functionalized graphene oxide, (iii) preparing film casting solution by step (i) amino-containing nanofiber dispersion and step (ii) ion-pair structure ionic liquid functionalized graphene oxide, and (iv) forming step (iii) film casting solution into thin film colloid on clean glass plate, immersing in deionized water, and then subjecting to heat treatment to obtain final product. USE - The method is useful for preparing solvent-resistance charged composite nanofiltration membrane. ADVANTAGE - The composite nanofiltration membrane: has excellent solvent resistance and high flux in organic solvents. DETAILED DESCRIPTION - Preparing solvent-resistance charged composite nanofiltration membrane, comprises (i) hydrolyzing poly(p-phenylene terephthalamide) (PPTA) by amide to obtain amino-containing nanofiber dispersion, (ii) anchoring initiator 2-bromo-2-methylpropionyl bromide on the surface of graphene oxide by esterification reaction to obtain graphene oxide containing bromine groups, then taking ion-pair structure ionic liquid i.e. 3-(carboxymethyl)-1-(4-vinylbenzyl)-1H-imidazol-3-ium bromide compounds of formula (I) as monomer, and growing polymer on bromine-containing graphene oxide by activators regenerated by electron transfer for atom transfer radical polymerization (ARGET-ATRP) to obtain ion-pair structured ionic liquid functionalized graphene oxide, (iii) preparing film casting solution by step (i) amino-containing nanofiber dispersion and step (ii) ion-pair structure ionic liquid functionalized graphene oxide, where the mass concentration of nanofiber is 2-7 wt.%, and mass concentration of ion-pair structure ionic liquid functionalized graphene oxide is 0.5-2 wt.%, and (iv) forming step (iii) film casting solution into thin film colloid on clean glass plate, immersing in deionized water to form thin film, and then subjecting to heat treatment to obtain final product. R = H or methyl; and n = 1-9.