纳滤
膜
界面聚合
纳米材料
聚酰胺
化学工程
单宁酸
纳米复合材料
材料科学
薄膜复合膜
生物污染
化学
纳米技术
高分子化学
聚合物
有机化学
反渗透
复合材料
单体
生物化学
工程类
作者
Quanling Xie,Chen Zhong-Yan,Wenhui Jin,Tong Yu,Lin Jing,Zhuan Hong,Mingen Zhang,Yiping Zhang,Hui Chen,Sijin Chen,Honghui Guo,Wenyao Shao
标识
DOI:10.1016/j.apsusc.2024.159975
摘要
Incorporating functionalized nanomaterials in the selective layer of conventional polyamide nanofiltration (NF) membrane is a promising strategy for overcoming the trade-off between permeability and selectivity. Highly hydrodispersible TA/ZIF-8 composite nanomaterials were prepared by etching ZIF-8 with tannic acid, and the thin-film nanocomposite (TFN) NF membranes were prepared by introducing TA/ZIF-8 into the interfacial polymerization aqueous phase solution. The nanomaterials and NF membranes' structure, chemical composition, and hydrophilicity were comprehensively characterized. The influence and mechanism of introducing TA/ZIF-8 into the polyamide layer on the separation performance of the TFN membranes were discussed by separating typical mono- and divalent salts. The optimal TFN membrane had a water flux of 26.59 LMH-bar−1 (increased by 86.6% than that of the TFC-blank membrane) with 94.95% rejection of Na2SO4 while having good antifouling performance and stability. Furthermore, the inverse size exclusion phenomenon of chlorine-contained salts was explored through relevant control experiments. This work is valuable for expanding the application of 3D nanomaterials in membrane separation technology and preparing high-performance TFN nanofiltration membranes.
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