由于反渗透能耗低,操作简单,用于海水脱盐受到越来越广泛的注意。反渗透海水淡化的关键是制备高性能的反渗透膜。一般海水含盐为3.5％,欲一次脱盐制取500ppm以下饮用水,要求膜的脱盐率应大于99％。按Loeb-Sourirajan程序制得的醋酸纤维素膜(CA膜)的脱盐率为96—98％,满足不了这一要求。后来,S.Manjilcian等人用醋酸丁酸纤维素(CAB) Due to low energy consumption and simple operation of reverse osmosis, desalination for seawater has drawn more and more attention. Reverse osmosis Desalination is the key to the preparation of high-performance reverse osmosis membrane. Salt water is 3.5% of the general sea, want a desalination system to make drinking water below 500ppm, the membrane desalination rate should be greater than 99%. According to Loeb-Sourirajan program prepared cellulose acetate membrane (CA membrane) desalination rate of 96-98%, can not meet this requirement. Later, S. Manjilcian et al used cellulose acetate butyrate (CAB)