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以三通道中空纤维超滤膜为基膜,以2,5-二胺基苯磺酸(DIA)、聚乙烯亚胺(PEI)与碱性品红(FB)为水相单体,均苯三甲酰氯(TMAC)为有机相单体,通过界面聚合制备了荷电镶嵌滤膜,并对膜的性能进行了系统分析。分析结果表明,该膜在0.35 MPa的操作压力下纯水通量为18.8 L·m-2·h-1,对NaCl和二甲酚橙的截留率分别为12.42%和96.44%;操作压力升高,膜的水通量与截留率均升高;溶质浓度增加,膜的截留率升高,水通量降低;膜对二甲酚橙/NaCl、PEG1000/NaCl混合体系的最大分因子分别为19.14和10.38;膜耐酸、耐高温性能较强,但耐碱性能较差。通过界面聚合后,孔径接近1 nm的微孔数量增加,具有纳滤膜的特征。
A three-channel hollow fiber ultrafiltration membrane was used as the basement membrane, and 2,5-diaminobenzenesulfonic acid (DIA), polyethyleneimine (PEI) and basic fuchsin (FB) The trimesoyl chloride (TMAC) is an organic phase monomer. The charge mosaic membrane was prepared by interfacial polymerization. The properties of the membrane were systematically analyzed. The results showed that the membrane had a pure water flux of 18.8 L · m-2 · h-1 at 0.35 MPa operating pressure and 12.42% and 96.44% retention rates of NaCl and xylenol orange respectively. Operating pressure High membrane flux and interception rate were increased; solute concentration increased, the membrane retention increased, the water flux decreased; membrane xylenol orange / NaCl, PEG1000 / NaCl mixture of the maximum sub-factor were 19.14 and 10.38; membrane acid, high temperature performance, but poor alkali resistance. After interfacial polymerization, the number of micropores with a pore size near 1 nm is increased and has the characteristics of a nanofiltration membrane.