期刊
LANGMUIR
卷 34, 期 23, 页码 6922-6929出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.8b00640
关键词
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资金
- National Key Research & Development Plan [2017YFB0308704]
- Nature Science Fund of ShanXi Province [2015011014-1, 201605D211008]
- Jialan Foundation
We present the facile preparation of a superhydrophobic oleophilic stainless steel mesh with excellent oil/water separation efficiency and resistance to corrosion through hydrofluoric (HF) acid etching, Ag nanoparticle coating, and stearic acid modification, to construct a super hydrophobic micro/nanohierarchical structure. The surface of the treated mesh exhibits superhydrophobicity, with a water contact angle of 152 degrees, and superoleophilicity, with an oil contact angle of 0 degrees. The effects of variation in the HF etching time and Ag nanoparticle coating on surface wettability were explored. The treated mesh demonstrated a very high separation efficiency, as high as 98% for the optimal preparation, on a series of oil/water mixtures. The durability of the treated mesh was tested by repeated separation of kerosene/water mixtures, with the separation efficiency remaining higher than 97% after 40 cycles. In addition, the mesh exhibited an excellent chemical resistance to both acidic and alkaline conditions, with good wearing in hot water. The improved superhydrophobic oleophilic mesh represents a feasible and realistic oil/water separation methodology even under harsh conditions, and it could have wide application in industrial processes.
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