Improved surface property of PVDF membrane with amphiphilic zwitterionic copolymer as membrane additive

► A novel amphiphilic zwitterionic copolymer PVDF-g-PSBMA was firstly synthesized by ATRP. ► The PVDF-g-PSBMA was used as membrane additive to prepare PVDF-g-PSBMA/PVDF blend membrane. ► The surface enrichment of PSBMA brush endowed PVDF blend membrane great improvement of surface property.