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Chen, Shengqiu; Xie, Yi; Chinnappan, Amutha; Wei, Zhiwei; Gu, Qilin; He, Hongying; Fang, Yuanlai; Zhang, Xiang; Lakshminarayanan, Rajamani; Zhao, Weifeng; Zhao, Changsheng; Ramakrishna, Seeram
The Science of the total environment, 08/2020, Letnik: 729Journal Article
The oil and bacteria adhesion during membrane separation process brings great challenges to the operation costs and membrane service life. Meantime, the strong chemical corrosion in sewage seriously limits the durability of membrane as well. Herein, a facile strategy is developed for fabricating highly stable and efficient zwitterionic nanofibrous membrane (NFM) with self-cleaning feature via the combination of in-situ cross-linking of poly (sulfobetaine methacrylate) (PSBMA) and electrospun poly (ether sulfone) (PES) nanofibers. Owing to the introduction of zwitterionic functional groups, the PSBMA/PES NFM exhibits superior antifouling ability (over 3 cycles of crude oil fouling/self-cleaning and up to 7 days of bacteria adhesion/repelling tests). Moreover, the membrane also presents remarkable chemical stability in acidic, alkaline and salty environments; and exhibits excellent separation performance for both layered oil/water mixture and oil-in-water emulsion as well. Furthermore, the membrane is capable to remove bacteria during the continuous oil/water mixture separation. Overall, the proposed strategy provides a new perspective into developing long-term antifouling membrane materials for complicated oily wastewater remediation in various corrosive environments. Display omitted •Self-cleaning zwitterionic nanofibrous membranes (NFMs) are prepared.•The NFMs can resist not only crude oil fouling but also bacteria adhesion.•The NFMs present highly-efficient oil/water separation performance.•The NFMs show great chemical stability in acid, alkaline and salty environments.
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