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    Facile preparation of grass-like structured NiCo-LDH/PVDF composite membrane for efficient oil-water emulsion separation

    Year: 2019

    Journal: J. Membr. Sci., Volume 573, Nov-01, page 226–233

    Authors: Cui, Jiuyun; Zhou, Zhiping; Xie, Atian; Wang, Qianqian; Liu, Siwei; Lang, Jihui; Li, Chunxiang; Yan, Yongsheng; Dai, Jiangdong

    Organizations: National Natural Science Foundation of China [21776110, U1507118, 21676127]; Natural Science Foundation of Jiangsu Province [BK20151350, BK20161367, BK20171315]; China Postdoctoral Science Foundation [2014M561588, 1501067C, 170103B]

    Keywords: Grass-like structured membrane; Superhydrophilicity; Nickel cobalt layered double hydroxide; Antifouling; Oil-water emulsions separation

    Development of antifouling membrane to separate oil-water emulsions by low energy consumption approach is an urgent demand. Herein, we report for the first time a grass-like structured composite membrane from array growth of nickel cobalt layered double hydroxide (NiCo-LDH) onto the polydopamine modified polyvinylidene fluoride (PVDF) membrane surface via simple hydrothermal strategy. The surface morphology of as-prepared membrane has controlled by hydrothermal time. The obtained NiCo-LDH/PVDF composite membrane exhibits superhydrophilicity/underwater superoleophobicity for separating both surfactant-free and surfactant-stabilized oil-water emulsions by capillary effect under the driving of gravity. Moreover, with the advantages of antifouling performance, the membrane displays outstanding cyclic performance for long-term application, which is promising for practical oily wastewater treatment.
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