期刊
ACS APPLIED NANO MATERIALS
卷 2, 期 3, 页码 1505-1515出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.8b02346
关键词
graphene; reversible wettability; superhydrophobic; self-healing; oil-water separation
资金
- National Natural Science Foundation of China [51805048, 11802039]
- Natural Science Foundation of Jiangsu Province [BK20181036]
Stable functional surfaces with reversibly switchable wettability have recently been developed for the continuous separation of oil-water mixtures. This article proposes a facile method to fabricate superhydrophobic surfaces on copper meshes by combining poly(dimethylsiloxane) and graphene. The super hydrophobic surface can dramatically switch to a superhydrophilic state under O-2 plasma etching and recover to a superhydrophobic state after laser etching to achieve unidirectional transport of oil or water. The surface had a high separation efficiency and favorable reusability in oil-water separation. In addition, the super hydrophobic surfaces demonstrated not only outstanding stability, including an anticorrosion ability, anti-UV exposure ability, oil contamination resistance, and abrasion resistance, but also an excellent self-healing ability after flame treatment. This research opens a novel avenue for the design of stable materials with reversible wettability that may have promising potential applications in microfluidics, wastewater purification, oil-spill cleanup, and quick, low-cost realization of self-healing materials in situ using operations that can be easily scaled and automated.
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