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Fluorine-free superhydrophobic coatings with pH-induced wettability transition for controllable oil-water separation

Xu, Zhiguang, Zhao, Yan, Wang, Hongxia, Zhou, Hua, Qin, Chuanxiang, Wang, Xungai and Lin, Tong 2016, Fluorine-free superhydrophobic coatings with pH-induced wettability transition for controllable oil-water separation, ACS applied materials and interfaces, vol. 8, no. 8, pp. 5661-5667, doi: 10.1021/acsami.5b11720.

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Title Fluorine-free superhydrophobic coatings with pH-induced wettability transition for controllable oil-water separation
Author(s) Xu, Zhiguang
Zhao, Yan
Wang, Hongxia
Zhou, Hua
Qin, Chuanxiang
Wang, Xungai
Lin, TongORCID iD for Lin, Tong orcid.org/0000-0002-1003-0671
Journal name ACS applied materials and interfaces
Volume number 8
Issue number 8
Start page 5661
End page 5667
Total pages 7
Publisher American Chemical Society
Place of publication Washington, D.C.
Publication date 2016
ISSN 1944-8244
1944-8252
Keyword(s) cotton
oil−water separation
pH-responsive wettability
superhydrophobic
superoleophobic
Summary We present a simple, environmentally friendly approach to fabricating superhydrophobic coatings with pH-induced wettability transition. The coatings are prepared from a mixture of silica nanoparticles and decanoic acid-modified TiO2. When the coating is applied on cotton fabric, the fabric turns superhydrophobic in air but superoleophilic in neutral aqueous environment. It is permeable to oil fluids but impermeable to water. However, when the coated fabric is placed in basic aqueous solution or ammonia vapor, it turns hydrophilic but underwater superoleophobic, thus allowing water to penetrate through but blocking oil. Therefore, such a unique, selective water/oil permeation feature makes the treated fabric have capability to separate either oil or water from a water-oil mixture. It may be useful for development of smart oil-water separators, microfluidic valves, and lab-on-a-chip devices.
Language eng
DOI 10.1021/acsami.5b11720
Field of Research 091205 Functional Materials
091209 Polymers and Plastics
0904 Chemical Engineering
0303 Macromolecular And Materials Chemistry
0306 Physical Chemistry (Incl. Structural)
Socio Economic Objective 860406 Synthetic Fibres
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, American Chemical Society
Persistent URL http://hdl.handle.net/10536/DRO/DU:30084134

Document type: Journal Article
Collection: Institute for Frontier Materials
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Created: Fri, 10 Jun 2016, 08:34:34 EST

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