Journal
CERAMICS INTERNATIONAL
Volume 45, Issue 17, Pages 21263-21269Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2019.07.108
Keywords
Sand; Polydopamine; TiO2; Superhydrophobicity; Multifunctionality
Categories
Funding
- Special Fund for Forest Scientific Research in the Public Welfare [201504501]
- Zhejiang A&F University Student Research and Training Program [KX20180135]
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Sand as a kind of natural material exists abundantly in desert has not been effectively utilized because of its superhydrophilicity. In this study, the superhydrophobic sand particles were successfully fabricated by structuring mussel-inspired polydopamine and TiO2 coatings on sand surfaces and subsequent hydrophobic modification with low surface energy material. The water droplets stood on the superhydrophobic sand surfaces with an almost perfect sphere (water contact angle of similar to 153 degrees), which broke the conventional concept towards the superhydrophilicity of sand. Furthermore, the obtained superhydrophobic sand particles had good water-holding capacity and high thermal stability, which contributed to the storage of water in desert. Meanwhile, the superhydrophobic sand exhibited a multifunctionality including oil/water separation, anti-icing properties and waterproof coating on fiberboards, which widened the application fields of desert sand and provided fast access to sustainable development of environment and natural resource.
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