Nanofibrous metal–organic framework composite membrane for selective efficient oil/water emulsion separation
Yahui Cai, Dongyun Chen*（陈冬赟）, Najun Li, Qingfeng Xu, Hua Li, Jinghui He, Jianmei Lu*（路建美）
College of Chemistry, Chemical Engineering and Materials Science,Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou ,215123, China
Journal of Membrane Science 543 (2017) 10--17
Among the various environmental problems, that of water pollution is undoubtedly one of the most severe that mankind faces; this global challenge requires efficient separation of surfactant-stabilized oil/water emulsions to be solved. Here, a separation membrane with unique wettability is prepared by integrating polyacrylonitrile nanofibers with nanocrystalline zeolite imidazole framework (ZIF-8). The membrane shows prewetting-induced superoleophobicity under water and superhydrophobicity under oil. Surfactant-stabilized oil/water emulsions are effectively separated by the hierarchically nanostructured composite membrane. The hybrid membrane displays a high oil contact angle under water (159°) and high water contact angle under oil (155°), resulting in fast separation dynamics and high separation efficiency. This membrane represents a new approach to exploit multifunctional materials for water remediation.
链接：http://www.sciencedirect.com/science/article/pii/S0376738817318598