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Issue 36, 2015
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Mussel and fish scale-inspired underwater superoleophobic kapok membranes for continuous and simultaneous removal of insoluble oils and soluble dyes in water

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Abstract

Bioinspired materials with special wettability towards water and oils have been proven very efficient in removal of insoluble organic pollutants in water. However, these materials cannot remove water-soluble organic contaminants, and often have some problems such as easy contamination by oils, low water tolerance and complicated preparation methods. Herein, we present a simple approach for the fabrication of mussel and fish scale-inspired underwater superoleophobic kapok membranes via treatment of natural kapok fibers with sodium chlorite, surface modification with polydopamine, and then filtered to yield membranes. SC treatment and PDA modification not only make the membranes underwater superoleophobic with high contact angles and low sliding angles for oils, but also introduce abundant N and O-containing groups. The kapok membranes feature excellent underwater superoleophobicity, high adsorption properties for water-soluble dyes, and high stability and flexibility. Furthermore, continuous and simultaneous removal of many kinds of insoluble oils and soluble dyes in water was achieved with very high removal efficiencies in a short time by simply passing through these membranes. We believe that the underwater superoleophobic kapok membranes are very promising for removal of organic pollutants in water.

Graphical abstract: Mussel and fish scale-inspired underwater superoleophobic kapok membranes for continuous and simultaneous removal of insoluble oils and soluble dyes in water

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Publication details

The article was received on 30 Jun 2015, accepted on 04 Aug 2015 and first published on 04 Aug 2015


Article type: Paper
DOI: 10.1039/C5TA04839G
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Citation: J. Mater. Chem. A, 2015,3, 18475-18482
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    Mussel and fish scale-inspired underwater superoleophobic kapok membranes for continuous and simultaneous removal of insoluble oils and soluble dyes in water

    J. Zhang, L. Wu, Y. Zhang and A. Wang, J. Mater. Chem. A, 2015, 3, 18475
    DOI: 10.1039/C5TA04839G

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