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    Bio-inspired fabrication of superhydrophilic nanocomposite membrane based on surface modification of SiO2 anchored by polydopamine towards effective oil-water emulsions separation

    Year: 2019

    Journal: Sep. Purif. Technol., Volume 209, JAN 31, page 434–442

    Authors: Cui, Jiuyun; Zhou, Zhiping; Xie, Atian; Meng, Minjia; Cui, Yanhua; Liu, Siwei; Lu, Jian; Zhou, Shi; Yan, Yongsheng; Dong, Hongjun

    Organizations: National Natural Science Foundation of China [U1507118, U1407123, 21406085]; Natural Science Foundation of Jiangsu Province [BK20151350, BK20140580, BK20161367]; China Postdoctoral Science Foundation [2014M561588, 1501067C]

    Keywords: Bio-inspired; Nanocomposite membrane; Superhydrophilicity; Underwater superoleophobicity; Oil-water emulsions separation

    A new PVDF@pDA@SiO2 nanocomposite membrane was fabricated by virtue of the surface modification of polydopamine anchored SiO2 on PVDF membrane through a facile and eco-friendly preparation process. It possessed the superior superhydrophilicity/underwater superoleophobicity properties and presented the out standing antifouling oil performance and high-efficiency separation ability for oil-water emulsions, which mainly resulted from its special surface micro-nano structure and pore induced capillarity phenomenon. Furthermore, the PVDF@pDA@SiO2 nanocomposite membrane also exhibited the splendid separation performance, regeneration ability and universality for various oil-water emulsions separation. In addition, the oil water emulsion separation mechanism was discussed in depth. This work might provide a significant guidance for large-scale production and application of this nanocomposite membrane in the fields of wastewater recovery and drinking water treatment.
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