A simple method for the fabrication of silica-based superhydrophobic surfaces |
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| Authors: | Qianqian Shang Yonghong Zhou Guomin Xiao |
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| Affiliation: | 1. Institute of Chemical Industry of Forestry Products, CAF; National Engineering Lab. for Biomass Chemical Utilization; Key and Lab. on Forest Chemical Engineering, SFA, Key Lab. of Biomass Energy and Material, Nanjing, 210042, Jiangsu Province, People’s Republic of China
2. School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, Jiangsu Province, People’s Republic of China
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| Abstract: | The present article reports on a simple and convenient method for the fabrication of superhydrophobic surfaces based on silica particles by spraying the as-prepared silica suspension containing silica sol and silica microspheres on the substrate. The morphologies of the silica particulate coatings could be controlled by varying the silica microsphere concentration. The silica particulate coatings as prepared were exceptionally rough and superhydrophilic, with water contact angles less than 5°. The surface silanol groups of the hydrophilic coatings could be functionalized using 1H,1H,2H,2H-perfluorodecyltriethoxysilane to form hydrophobic groups. The resulting surface showed excellent superhydrophobic property with water contact angle up to 165.6 ± 0.9° and sliding angle of 3.5 ± 0.4°. In addition, the superhydrophobicity of the coating possessed a good stability after 3 months of exposure in air for a wide range of pH values. |
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