Abstract In this study, a novel loose-NF membrane was fabricated by coating the polyethyleneimine (PEI) layer on a hydrolyzed polyacrylonitrile (HPAN) ultrafiltration membrane, followed by phosphorylation with inositol hexaphosphate (IP6) and cross-linking process. The cross-linked network was constructed by the coordinative cross-linking of Fe (III) ion and phos-(PEI), and the electrostatic attraction of PEI and IP6. At the optimized fabricating conditions, the loose-NF membrane exhibited both high rejection to dyes and transmission to different salts. The rejections of 0.1 g/L methyl blue (MB), congo red (GR), acid fuchsin (AF) and crystal violet (CV) aqueous solutions respectively were 99.92%, 99.53%, 98.99% and 92.86%, and the corresponding fluxes were 11.54, 10.96, 11.40 and 11.76 L m−2 h−1 at operating pressure of 0.2 MPa. Meanwhile, the membrane exhibited low rejections to different salt solutions with the order of MgCl2 (30.51%) > MgSO4 (20.57%) > NaCl (7.46%) > Na2SO4 (5.89%) and fluxes around 19 L m−2 h−1 at 0.2 MPa. Moreover, the prepared membrane possessed high stability for dealing with biologically treated textile effluent (100 h).

中文翻译：

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基于多孔PAN UF膜上聚乙烯亚胺层磷酸化和交联的新型松散NF膜

摘要 在本研究中，通过在水解聚丙烯腈 (HPAN) 超滤膜上涂覆聚乙烯亚胺 (PEI) 层，然后用六磷酸肌醇 (IP6) 进行磷酸化和交联过程，制备了一种新型松散 NF 膜。交联网络是由 Fe (III) 离子和磷 (PEI) 的配位交联以及 PEI 和 IP6 的静电吸引构建的。在优化的制造条件下，松散的 NF 膜表现出对染料的高排斥性和对不同盐的传输。0.1 g/L 甲基蓝 (MB)、刚果红 (GR)、酸性品红 (AF) 和结晶紫 (CV) 水溶液的去除率分别为 99.92%、99.53%、98.99% 和 92.86%，以及相应的通量在 0.2 MPa 的操作压力下分别为 11.54、10.96、11.40 和 11.76 L m-2 h-1。同时，膜对不同盐溶液的截留率低，顺序为 MgCl2 (30.51%) > MgSO4 (20.57%) > NaCl (7.46%) > Na2SO4 (5.89%) 并且在 0.2 MPa 时通量约为 19 L m-2 h-1 . 此外，所制备的膜对处理生物处理过的纺织废水（100 小时）具有高稳定性。