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Issue 45, 2017
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Laser-structured Janus wire mesh for efficient oil–water separation

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Abstract

We report here the fabrication of a Janus wire mesh by a combined process of laser structuring and fluorosilane/graphene oxide (GO) modification of the two sides of the mesh, respectively, toward its applications in efficient oil/water separation. Femtosecond laser processing has been employed to make different laser-induced periodic surface structures (LIPSS) on each side of the mesh. Surface modification with fluorosilane on one side and GO on the other side endows the two sides of the Janus mesh with distinct wettability. Thus, one side is superhydrophobic and superoleophilic in air, and the other side is superhydrophilic in air and superoleophobic under water. As a proof of concept, we demonstrated the separation of light/heavy oil and water mixtures using this Janus mesh. To realize an efficient separation, the intrusion pressure that is dominated by the wire mesh framework and the wettability should be taken into account. Our strategy may open up a new way to design and fabricate Janus structures with distinct wettability; and the resultant Janus mesh may find broad applications in the separation of oil contaminants from water.

Graphical abstract: Laser-structured Janus wire mesh for efficient oil–water separation

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Publication details

The article was received on 17 Aug 2017, accepted on 18 Oct 2017 and first published on 19 Oct 2017


Article type: Paper
DOI: 10.1039/C7NR06110B
Citation: Nanoscale, 2017,9, 17933-17938
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    Laser-structured Janus wire mesh for efficient oil–water separation

    Y. Liu, D. Han, Z. Jiao, Y. Liu, H. Jiang, X. Wu, H. Ding, Y. Zhang and H. Sun, Nanoscale, 2017, 9, 17933
    DOI: 10.1039/C7NR06110B

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