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Issue 69, 2018, Issue in Progress
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Underwater superoleophobic polyurethane-coated mesh with excellent stability for oil/water separation

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Abstract

Oil/water separation has been a challenge in chemical engineering for various applications. There are numbers of studies on using coated metal meshes as a filter for oil/water separation. However, water resistance, chemical (such as: acid, base, and fouling) resistance and heat resistance for coating materials need further exploration, especially in terms of the durability of the coating materials. In this study, we synthesized a new coating material, hydrophilic polycarbonate polyurethane (HPCPU). We used HPCPU to chemically modify a steel mesh, and the mesh exhibits superhydrophilic and underwater superoleophobic properties. The HPCPU coated mesh shows excellent capacity for oil/water separation with a separation efficiency higher than 99.99% even after 40 cycles of separation. The coating material also exhibits excellent properties of water resistance, heat resistance, and chemical resistance. Moreover, the HPCPU-coated mesh exhibits a strong durability. For example, the separation efficiency for various oil/water mixtures remains higher than 99.7% after the HPCPU-coated mesh has been soaked in water for 30 days, hot water for 5 days, oils for 5 days, 0.5 M HCl solution, 0.5 M NaOH solution and 0.5 M NaCl solution for 24 hours.

Graphical abstract: Underwater superoleophobic polyurethane-coated mesh with excellent stability for oil/water separation

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Publication details

The article was received on 25 Sep 2018, accepted on 14 Nov 2018 and first published on 27 Nov 2018


Article type: Paper
DOI: 10.1039/C8RA07965J
Citation: RSC Adv., 2018,8, 39657-39666
  • Open access: Creative Commons BY-NC license
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    Underwater superoleophobic polyurethane-coated mesh with excellent stability for oil/water separation

    X. Yang, D. Lang, Z. Wang, J. Cao, R. Wu and W. Wang, RSC Adv., 2018, 8, 39657
    DOI: 10.1039/C8RA07965J

    This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material and it is not used for commercial purposes.

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      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
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      [Original citation] - Published by The Royal Society of Chemistry.

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