材料科学
生物污染
聚乙烯吡咯烷酮
结垢
相位反转
膜
多孔性
化学工程
涂层
纳米技术
高分子化学
复合材料
化学
生物化学
工程类
作者
Zhongxiang Bai,Kun Jia,Shuai Zhang,Guo Lin,Yumin Huang,Xiaobo Liu
标识
DOI:10.1002/adfm.202204612
摘要
Abstract The porous polymeric membranes prepared by conventional nonsolvent‐induced phase separation (NIPS) suffer from notorious fouling pollution during oil/water separation. Herein, an improved one‐step NIPS strategy is proposed to fabricate anti‐fouling polyethersulfone (PES) based membranes that bear hierarchically spherical structures on the interface and an internalized gel network. More specifically, the hydrogen bonding between hydrophilic additives of polyvinylpyrrolidone (PVP) and tannic acid (TA), as well as Fe 3+ ‐TA coordination interaction are orchestrated to modulate their surface segregation behaviors during NIPS, leading to in situ generation of the interfacial assembled nanospheres and embedded gel networks in the PES matrix. Thanks to the synergistic effect of these dual antifouling barriers, the optimized membrane exhibits super‐hydrophilic/underwater super‐oleophobic properties, and displays high efficiency as well as good recyclability in separating surfactant stabilized oil‐in‐water emulsions. In addition, this improved NIPS methodology allows dip coating of various porous substrates to separate diverse oil/water mixtures, which also exhibits good anti‐fouling ability. Basically, this study will provide new insights for design of anti‐pollution oil/water separation materials by the phase inversion method.
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