4.7 Article

Surface modification on a glass surface with a combination technique of sol-gel and air brushing processes

期刊

APPLIED SURFACE SCIENCE
卷 257, 期 20, 页码 8640-8646

出版社

ELSEVIER
DOI: 10.1016/j.apsusc.2011.05.041

关键词

Superhydrophobic; Transparent; Glass; Sol-gel; Silica particle; Air brushing

资金

  1. KAUST [KUK-C1-014-12]

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This study fabricated the large area and optically transparent superhydrophobic silica based films on glass surface with optimized hardness. A silane coupling agent, tetraethoxysilane (TEOS), effectively bonds silica particles onto the glass substrate. Desired surface roughness was obtained by adjusting nano silica particles concentration of the precursors prepared by the sol-gel process. Silica suspension was coated onto the glass substrate by the air brushing methods. This method can deposit a uniform, transparent coating on the glass substrate efficiently. Diluting the precursor by adding ethanol or a mixture of D. I. water and ethanol further improved the transmittance and superhydrophobicity efficiency. The results showed that as the silica particle concentration and the thickness of the coating were increased, the surface roughness was enhanced. Rougher surface displayed a higher superhydrophobicity and lower transmittance. Therefore, the concentration of silica particle, volume of coatings, and the ratio of ethanol and D.I. water are of great importance to deposit a transparent, superhydrophobic coating on glass. (C) 2011 Elsevier B.V. All rights reserved.

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