Polysulfone/N-phthaloylchitosan novel composite membranes for salt rejection application

► N-phthaloylchitosan (CS) was synthesized by reaction of chitosan with phthalic anhydride in dimethyl formamide. ► Different compositions of polysulfone (PSf) and N-phthaloylchitosan were used to prepare novel composite membranes ► PSf:CS 80:20 showed the greatest effective pore area while PSf:CS 95:05 showed the smallest value. ► Rejection study implied that the PSf:CS 95:05 possessed the smallest pore size among these membranes.