Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 543, Issue -, Pages 10-17Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.memsci.2017.08.047
Keywords
PAN-fiber membrane; Zeolite imidazole frameworks (ZIF-8); Oil-water emulsions separation; Superhydrophobicity; Superoleophobicity
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Funding
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- National Natural Science Foundation of China [51573122, 21301125]
- National Key Technology R D Program [2015BAG20B03-06]
- Science and Technology Program for Social Development of Jiangsu [BE2015637]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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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 degrees) and high water contact angle under oil (155 degrees), resulting in fast separation dynamics and high separation efficiency. This membrane represents a new approach to exploit multifunctional materials for water remediation.
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