The grafted membranes were capable of rejecting an anionic dyestuff . in common with other polyelectrolytes , the conformation of grafted ampsa polymeric chains is sensitive to environmental factors such as ph and ionic strength ( i ) 聚丙烯酰胺基甲基丙磺酸為高分子電解質(zhì),接枝在膜表面后高分子鏈與溶質(zhì)分子相互作用,可使接枝鏈構(gòu)象發(fā)生變化,從而改變膜孔徑的大小,使膜具有環(huán)境響應。