期刊
APPLIED SURFACE SCIENCE
卷 257, 期 24, 页码 10421-10426出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2011.06.122
关键词
Superhydrophobic; Sol-gel; Colloidal silica; Hardness; Roughness
类别
资金
- CSIR
Sol-gel superhydrophobic coatings with improved hardness were prepared by embedding fumed silica nanoparticles in a partially condensed hybrid sol of methyltriethoxysilane (MTEOS) and colloidal silica. Fumed silica particles of size 25-30 nm were incorporated in the sol and the mixture was spray-coated on glass substrate. Water contact angle (WCA) of the composite coating increased with increase in silica content of the sol mixture. The concentration of silica in the sol mixture was optimized to obtain robust superhydrophobic coatings with a WCA of 162.5 degrees and a pencil hardness of 5H. The wetting state of water droplet on the sol-gel composite coatings was analysed with both Wenzel and Cassie-Baxter models. (C) 2011 Elsevier B.V. All rights reserved.
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