分别以邻苯二胺、间苯二胺、对苯二胺为水相单体,均苯三甲酰氯(TMC)为油相单体,聚醚砜超滤膜为基膜,界面聚合法制备了复合纳滤膜.在纳滤膜对Na<,2>SO<,4>,MgSO<,4>,MgCl<,2>和NaCl四种盐的脱盐率中,间苯二胺膜最高,对苯二胺膜居中,邻苯二胺膜最差;在纳滤膜耐氯性能方面,对苯二胺最佳,邻苯二胺居中,间苯二胺最差.综合纳滤膜的分离性能和耐氯性能,对苯二胺为最优的单体.%Composite nanofiltration membranes were fabricated through interfacial polymerization. Membranes were prepared with diamine as aqueous monomer and trimesoyl chloride ( TMC ) as organic monomer on the support of polyethersulfone (PES)ultrafiltration membranes. Three different diamines were utilized as aqueous monomer respectively. They are o-phenylenediamine,m-phenylenediamine and p-phenylenediamine. The separation performance and the chlorine resistance of these membranes were compared. The salts rejection on four different salts Na2SO4, MgSO4, MgCl2 and NaCl were measured. The order was m-phenylenediamine ＞ p-phenylenediamine ＞ o-phenylenediamine. The order of chlorine resistance was p-phenylenediamine ＞ o-phenylenediamin ＞ m-phenylenediamine. Combining the performance of salts rejection with chlorine resistance p-phenylenediamine was the optimal monomer for polyamide nanofiltration membranes.
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