【摘要】 用聚丙烯腈超滤膜（ＰＡＮ）为基膜制成的ＣＳ复合膜，对乙醇／水溶液的分离具有较稳定的透过性，复合膜先后运行于低浓度的乙醇溶液和９５ｗｔ％乙醇溶液，膜的稳定性能优于均质膜。实验还表明用多种交联剂代替硫酸处理超薄复合膜，可有效地提高膜的渗透选择性。其中，聚苯乙烯磺酸钾（ＰＳＳＫ）最有效，在溶液温度为７０℃时，膜的分离系数αｗ／ｅ可达４５３，渗透通量为８１０ｇ／ｍ２ｈ更多还原

【Abstract】 The chitosan polyacrylonitrile(CS/PAN) composite membrane was prepared and used to separate the ethanol water mixture by pervaporation. The membrane showed higher stability than that of the homogeneous membrane. The permselectivity of the composite membrane can be kept after operating in the low ethanol concentration feed solution. Ten odd kinds of reagents instead of sulfuric acid aqueous solution were used to treat the CS composite membrane. The experiments indicated that the ultra thin composite membrane treated by poly(kalium 4 styrenesulfonate)(PSSK) possessed the best permselectivity, its separation factor and permeability reaching 453 and 170g/m 2h, respectively.更多还原