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以聚丙烯中空纤维微滤膜为底膜、羧甲基纤维素钠为功能材料、氯化铁为交联剂,采用溶液涂覆-交联工艺制备了表面荷电的中空纤维复合膜,将该中空纤维复合膜用于正渗透(FO)过程,研究了汲取液盐含量、原料液流速等对FO通量的影响。结果表明,制备的荷电中空纤维复合膜可用于FO过程,以蒸馏水为原料液、Na2SO4水溶液为汲取液,采用PRO模式进行FO试验,当原料液与汲取液体积流量均为15 mL/min、汲取液浓度为0.5 mol/L时,FO水通量为12.3 L/(m2.h),盐通量与水通量的比为1.42 g/L。
The surface hollow fiber membrane was prepared by using polypropylene hollow fiber microfiltration membrane as base material, sodium carboxymethyl cellulose as functional material and ferric chloride as cross-linking agent. The surface-charged hollow fiber composite membrane was prepared by solution coating- The hollow fiber composite membrane was used in the process of positive infiltration (FO), and the influence of the salt content of the draw liquid and the flow rate of the raw material liquid on the FO flux was studied. The results show that the prepared hollow fiber composite membrane can be used in the FO process, distilled water as the raw material solution, Na2SO4 aqueous solution as the draw solution, the PRO mode for the FO test, when the raw material and the draw volume of 15 mL / min, The FO water flux was 12.3 L / (m2.h) when the extract concentration was 0.5 mol / L, and the ratio of salt flux to water flux was 1.42 g / L.