1. Facile synthesis of fluorine-free, hydrophobic, and highly transparent coatings for self-cleaning applications
- Author
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Pascal Laurent, Julie Chalon, Abderrahmane Hamdi, Elhadj Dogheche, Benoit Dodin, Philippe Champagne, L'Institut de Recherche Technologique (IRT) de la filière Ferroviaire (IRT Railenium), Université Polytechnique Hauts-de-France (UPHF), Laboratoire des Matériaux Céramiques et Procédés Associés - EA 2443 (LMCPA), Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), SNCF : Innovation & Recherche, SNCF, Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 (IEMN-DOAE), INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Optoélectronique - IEMN (OPTO - IEMN), INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), and Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)
- Subjects
Materials science ,Trimethylsilyl ,Scanning electron microscope ,Hydrophobicity ,chemistry.chemical_element ,02 engineering and technology ,Temperature cycling ,engineering.material ,010402 general chemistry ,01 natural sciences ,law.invention ,Contact angle ,chemistry.chemical_compound ,[SPI]Engineering Sciences [physics] ,Colloid and Surface Chemistry ,Optical microscope ,Coating ,law ,Spectrophotometry ,medicine ,[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph] ,medicine.diagnostic_test ,Surfaces and Interfaces ,General Chemistry ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,Surfaces, Coatings and Films ,chemistry ,Chemical engineering ,engineering ,Fluorine ,[SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic ,Non-fluorinated coatings ,[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] ,Transparent surfaces ,0210 nano-technology ,Self-cleaning - Abstract
International audience; 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.
- Published
- 2021
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