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Facile fabrication of nanofiber- and micro/nanosphere-coordinated PVDF membrane with ultrahigh permeability of viscous water-in-oil emulsions

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Abstract

To achieve highly efficient purification of emulsified oil, a superhydrophobic, superoleophilic and under-oil superhydrophobic poly(vinylidene fluoride) (PVDF) nanofibrous membrane was developed through a facile electrospinning strategy. The PVDF nanofibrous membrane exhibited a synchronous combination of nanofibers and micro/nanospheres, which was produced by solely controlling the PVDF concentration of the electrospun solutions. The fabricated PVDF nanofibrous membrane exhibited a water contact angle of 152° ± 2°, oil contact angle of 0° in air and under-oil–water contact angle of 152° ± 1° due to the inherently low surface energy and unique structures composed of nanofibers and micro/nanospheres. Thanks to the under-oil superhydrophobicity, hierarchical structure and high porosity (∼95%), the composite membrane showed extremely high permeability of 88 166 ± 652 L m−2 h−1 bar−1 with separation efficiency higher than 99%, which was few orders of magnitude higher than the previous findings. Moreover, the nanofibrous membrane exhibited robust continuous separation, indicating its scalable application for purifying emulsified oil.

Graphical abstract: Facile fabrication of nanofiber- and micro/nanosphere-coordinated PVDF membrane with ultrahigh permeability of viscous water-in-oil emulsions

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Publication details

The article was received on 13 Feb 2018, accepted on 19 Mar 2018 and first published on 19 Mar 2018


Article type: Paper
DOI: 10.1039/C8TA01539B
Citation: J. Mater. Chem. A, 2018, Advance Article
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    Facile fabrication of nanofiber- and micro/nanosphere-coordinated PVDF membrane with ultrahigh permeability of viscous water-in-oil emulsions

    J. Wu, Y. Ding, J. Wang, T. Li, H. Lin, J. Wang and F. Liu, J. Mater. Chem. A, 2018, Advance Article , DOI: 10.1039/C8TA01539B

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