期刊
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
卷 124, 期 6, 页码 -出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s00339-018-1781-4
关键词
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资金
- National Natural Science Foundation of China [21367022, 51662036]
- Bingtuan Innovation Team in Key Areas [2015BD003]
- Engineering Research Center of Materials-Oriented Chemical Engineering of Xinjiang Bintuan [2016BTRC008, 2016BTRC005]
- Graduate Student Scientific Research Innovation Projects in Xinjiang Autonomous Region [XJGRI2017046]
The wetting materials with the ability of controllable oil/water separation have drawn more and more public attention. In this article, the novel cotton fabric (CF) with pH controlled wettability transition was designed by a simple, environmentally friendly coating copolymer/SiO2 nanoparticles, poly(heptadecafluorodecyl methacrylate-co-3-trimethoxysilylpropyl methacrylate-co-2-vinilpiridine) (PHDFDMA-co-PTMSPMA-co-P2VP). Furthermore, the structures and morphologies of coated CF were confirmed by Fourier transform infrared spectroscopy (FTIR), NMR, GPC, scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). The coated CF exhibits switchable wettability between superhydrophobicity and superhydrophilicity via adjusting pH value. When the coated CF is placed in the neutral aqueous (pH = 7.0), it is superhydrophobic in the air and superoleophilic. It allows oil to go through but blocking water. However, in acidic aqueous environment (pH = 3.0), it turns superhydrophilic and underwater superoleophobic, which allows water to penetrate but blocking oil. Therefore, the coated CF could be applied to separate oil/water mixtures, ternary oil/water/water mixtures continuously and different surfactant stabilized emulsions (oil-in-water, water-in-oil) and displays the superior separation capacity for oil-water mixtures with a high efficiency of 99.8%. Moreover, the cycling tests demonstrate that the coated CF possesses excellent recyclability and durability. Such an eminent, controllable water/oil permeation feature makes coated CF could be selected as an ideal candidate for oil/water separation.
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