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    Construction of superhydrophilic and underwater superoleophobic membranes via in situ oriented NiCo-LDH growth for gravity-driven oil/water emulsion separation

    Year: 2019

    Journal: J. Taiwan Inst. Chem. Eng., Volume 104, NOV, page 240–249

    Authors: Cui, Jiuyun; Wang, Qianqian; Xie, Atian; Lang, Jihui; Zhou, Zhiping; Yan, Yongsheng

    Organizations: National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [21776110]; Natural Science Foundation of Jiangsu ProvinceNatural Science Foundation of Jiangsu Province [BK20180886, BK20171315, BK20181230, BK20181229, BK20180192]

    Keywords: Superhydrophilicity/underwater superoleophobicity; Membrane separation; Gravity-driven; NiCo-LDH; Emulsion separation

    The development of superhydrophilic/underwater superoleophobic membrane is significant for purification of emulsified oily wastewater. However, low flux and membrane fouling still remains a challenge. Herein, a sisal-like structured hybrid membrane is prepared through in situ growth of nickel cobalt layered double hydroxide (NiCo-LDH) microcrystals on membrane surface for oil/water emulsion separation. The as-prepared hybrid membrane (CN@pDA@PVDF) exhibits low oil adhesion, outstanding antifouling performance and superhydrophilicity/underwater superoleophobicity. Under gravity driven, the separation experimental results demonstrate the as-prepared membrane can effective separate surfactant-free emulsion (SFE) and surfactant-stabilized emulsion (SSE) with separation efficiency of above 99.4%. Furthermore, with a simple and low cost approach, as well as the significantly enhanced performance, the as-prepared hybrid membrane has bright application prospective in wastewater treatment. (C) 2019 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
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