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论文类型：期刊论文

发表时间：2016-01-01

发表刊物：SURFACE ENGINEERING

收录刊物：SCIE、EI、Scopus

卷号：32

期号：2,SI

页面范围：85-94

ISSN号：0267-0844

关键字：Underwater superoleophobic surfaces; Ti-6Al-4V substrate; Electrochemical etching; Superhydrophilicity; Durable

摘要：Underwater superoleophobic Ti6Al4V surfaces were fabricated successfully via electrochemical etching. The morphologies, chemical compositions and crystal structures of the prepared titanium alloy surfaces were characterised by scanning electron microscopy, energy-dispersive spectroscopy and X-ray diffraction, respectively. The relationship between the etching time and oil wettability in water was investigated and the formation mechanism of hierarchical micro/ nano rough structures on titanium alloy surfaces was also carefully analysed. Further, a series of exposure, immersion and abrasion tests were conducted to evaluate durability, corrosion resistance and abrasion resistance of the fabricated titanium alloy surfaces under harsh conditions. The results show that the prepared surfaces exhibit good underwater superoleophobicity, whose oil contact angle for dichloromethane in water is 158.9 degrees +/- 1.7 degrees and corresponding sliding angle is 6.4 degrees +/- 1.4 degrees. Our approach is simple, efficient and may broaden the potential applications of superoleophobic titanium alloy surfaces in underwater self-cleaning and anti-oil pollution fields.