纳滤
膜
化学工程
界面聚合
材料科学
超滤(肾)
溶剂
结垢
水溶液
甲醇
聚醚酰亚胺
纳米颗粒
色谱法
聚合物
化学
纳米技术
有机化学
单体
复合材料
生物化学
工程类
作者
Zhaohuang Zhong,Lang Li,Seung Min Yu,X. Li,Haike Li,Jianghui Jia,Jingyun Huang,Meng Cai,Wanfu Huang
摘要
Abstract With the growing complexity of separation systems, the application of thin film composite nanofiltration (TFN) membranes in organic solvent separation faces numerous challenges. To augment its solvent stability, an in‐situ constructed dopamine hydrogel doped with UiO‐66@CNT was developed as an intermediate layer on a polyetherimide (PEI) ultrafiltration membrane. Subsequent interfacial polymerization on this interlayer led to the formation of a solvent‐resistant nanofiltration membrane with a vast covalent bond structure, large specific surface area, and enhanced hydrophilicity. Our findings revealed that when the CNT loading in the UiO‐66@CNT composite nanoparticles was 2 wt%, the TFN‐U 2 C 2 membrane exhibited a maximum pure water flux of 126.32 L/(m 2 ·h) and a methanol flux of 45.45 L/(m 2 ·h). The rejection rates for Congo red aqueous and methanol solutions were 96.88% and 92.14%, respectively. The membrane also demonstrated commendable anti‐fouling properties. Remarkably, even after 48 h of immersion in various organic solvents, the membrane retained its morphology and separation efficiency. Compared to the TFN‐U 2 membrane without CNT addition, the enhancement in separation performance was considerably significant. Hence, this membrane has significant potential for application in treatment of wastewater containing organic solvents and is promising in related fields.
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