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Tuning up sol-gel process to achieve highly durable superhydrophobic coating

Hashjin Ra'na Rafiei, Ranjbar Zahra, Yari Hossein et Momen Gelareh. (2022). Tuning up sol-gel process to achieve highly durable superhydrophobic coating. Surfaces and Interfaces, 33, e102282.

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Considering practical application of hydrophobic coatings, their durability is a matter of issue. Existing routes for mitigating the problem might not be applicable due to suggesting expensive facilities and non-eco-friendly materials. This paper introduces a robust, scalable cost-effective sol-gel route to obtain a durable superhydrophobic coating. Main component of the sol included Tetraethyl orthosilicate and Methyltriethoxysilane as sol matrix, Triethoxyoctylsilane as a low surface energy precursor, and fumed silica nanoparticles for roughness formation. A coating with a contact angle of 160° and very low sliding angle (<1°) was fabricated. The robustness of the coating was highly improved by incorporating sols with different pH values and spraying them alternately on glass substrate. As a result, the longevity of superhydrophobic behavior doubled under accelerated weathering conditions and reached 1500 h, which could be considered as a promising weathering durability. The coating retained its hydrophobicity after three runs of peeling tape test and 26 min continuous slurry erosion. Regarding sol-gel technique, the research demonstrated how to boost the durability of a superhydrophobic coating by only utilizing chemical characteristics of the sols and incorporating available facilities with non-fluoro based materials. The reaction mechanisms during the sol-gel process and the effect of each component on final properties were thoroughly discussed and fundamentally correlated to the obtained results.

Type de document:Article publié dans une revue avec comité d'évaluation
Version évaluée par les pairs:Oui
Identifiant unique:10.1016/j.surfin.2022.102282
Sujets:Sciences naturelles et génie > Génie
Sciences naturelles et génie > Génie > Génie des matériaux et génie métallurgique
Sciences naturelles et génie > Sciences appliquées
Département, module, service et unité de recherche:Départements et modules > Département des sciences appliquées > Module d'ingénierie
Unités de recherche > Centre international de recherche sur le givrage atmosphérique et l’ingénierie des réseaux électriques (CENGIVRE) > Laboratoire des revêtements glaciophobes et ingénierie des surfaces (LaRGIS)
Mots-clés:superhydrophobic coating, sol-gel, pH, erosion, durability, weathering, revêtement superhydrophobe, érosion, durabilité, intempéries
Déposé le:28 janv. 2023 21:13
Dernière modification:09 févr. 2023 15:21
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