Facile and rapid assembly of high-performance tannic acid thin-film nanofiltration membranes via Fe3+ intermediated regulation and coordination
Facile and rapid assembly of high-performance tannic acid thin-film nanofiltration membranes via Fe3+ intermediated regulation and coordination
复制标题
通过 Fe3 介导调节和协调轻松快速组装高性能单宁酸薄膜纳滤膜
DOI：
10.1016/j.seppur.2020.118228
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发表时间：
2021-04-01
影响因子：
8.6
通讯作者：
Zhang, Ganwei
中科院分区：
文献类型：
--
作者：
Liu, Dapeng;Chen, Yongliang;Zhang, Ganwei
非聚酰胺（non-PA）薄膜复合纳滤膜（TFC-NF）近年来受到了广泛关注，但其制备工艺复杂，渗透性和选择性之间的矛盾严重阻碍了其发展。在这里，我们报告了一个高度选择性的非PA TFC-NF膜，通过2分钟的快速组装单宁酸（TA）水解聚丙烯腈（PAN）基板上通过Fe 3+介导的调节和协调。截留分子量约为390 Da的优化膜对Na_2SO_4 ~（4-）顺序的盐具有较高的截留率（90.2%）>硫酸镁（83.4%）> NaCl（50.0%）> MgCl2（35.2%）和有机污染物的理想拒绝（例如>99.0%染料、92.2%链霉素和81.8%氯霉素），同时保持高达13.6 L中心点m（-2）中心点h（-1）中心点条（-1）的纯水渗透率，其明显优于所报道的非PA膜。此外，组装的TFC膜表现出优异的渗透性能和合理的结构稳定性对操作压力和溶液碱度。这些结果是非常有前途的，并表明膜在实际的纳滤应用中，如水净化和废水回收的巨大潜力。我们的工作概述了新型高性能非PA膜的生产与快速制造过程中的绿色化学背景。
Non-polyamide (non-PA) thin-film composite nanofiltration (TFC-NF) membranes have received tremendous attention in recent years, but their development is strongly hindered by the complicated fabrication process and the trade-off between permeability and selectivity. Here, we report a highly perm-selective non-PA TFC-NF membrane through 2-minute rapid assembly of tannic acid (TA) on hydrolyzed polyacrylonitrile (PAN) substrate via Fe3+ intermediated regulation and coordination. The optimized membrane with a molecular weight cut off of similar to 390 Da showed high rejections for salts in a sequence of Na2SO4 (90.2%) > MgSO4 (83.4%) > NaCl (50.0%) > MgCl2 (35.2%) and desirable rejections for organic pollutants (e.g. >99.0% dyes, 92.2% streptomycin and 81.8% chloramphenicol) while maintaining a pure water permeability of as high as 13.6 L center dot m(-2)center dot h(-1)center dot bar(-1), which clearly outperforms the reported non-PA membranes. In addition, the assembled TFC membrane showed excellent antifouling performance and reasonable structural stability against operation pressure and solution alkalinity. These results are highly promising and indicate a great potential for the membrane to be used in practical nanofiltration application, e.g. water purification and wastewater reclamation. Our work outlines the production of novel high-performance non-PA membrane with a fast fabrication process in a green chemistry context.