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Article Dans Une Revue Journal of Coatings Technology and Research Année : 2021

Facile synthesis of fluorine-free, hydrophobic, and highly transparent coatings for self-cleaning applications

Résumé

Non-fluorinated coatings have recently emerged as a new approach to avoid contamination on transparent surfaces. This research work concerns the synthesis of highly transparent, hydrophobic, durable, and self-cleaning coatings as an alternative to fluorine-based coatings used on glass. The developed coating is produced by a chemical route (sol–gel method) using two silica-based precursors, hexamethyldisilazane, and tetraethoxysilane (HMDS/TEOS). Then, the prepared Gel HMDS/TEOS was deposited on glass slides by the dip-coating technique. Afterward, the effects of mechanical durability, water-drop testing, thermal cycling testing, and aging times on the hydrophobicity of the gel were analyzed. The properties of the coating were characterized by optical microscopy, scanning electron microscopy, UV-VIS-NIR spectrophotometry, and contact angle measurement. The results show that the organic modification of the gel by trimethylsilyl (-Si-(CH3)3) groups leads to a homogeneous and a hydrophobic surface. Sufficient dilution of this gel with ethanol has been found to provide a highly transparent coating without losing its hydrophobic property. In addition, the robust and durable coating exhibits high self-cleaning performance suitable for various industrial applications.
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Dates et versions

hal-03149495 , version 1 (23-02-2021)

Identifiants

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Abderrahmane Hamdi, Julie Chalon, Pascal Laurent, Benoit Dodin, El Hadj Dogheche, et al.. Facile synthesis of fluorine-free, hydrophobic, and highly transparent coatings for self-cleaning applications. Journal of Coatings Technology and Research, 2021, 18, pp.807-818. ⟨10.1007/s11998-020-00444-y⟩. ⟨hal-03149495⟩
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