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Icephobicity and electrical assessment of slippery coating impregnated with a stabilized hydroxyl-terminated lubricant for high voltage insulation application

Heydarian Samaneh, Momen Gelareh et Jafari Reza. (2023). Icephobicity and electrical assessment of slippery coating impregnated with a stabilized hydroxyl-terminated lubricant for high voltage insulation application. Journal of Materials Science, 58, (22), p. 9264-9281.

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In cold climate conditions, insulators are subjected to ice accretion that could affect their electrical performance and consequently lead to power outages. Besides icing, other outdoor factors, such as UV, rain, and pollution, could influence their electrical insulation efficiency. Slippery liquid-infused coatings have attracted great attention due to their icephobic applications. However, the problems caused by lubricant depletion could restrict their service time and thus limit their applications. Here, lubricant-loaded carrier (LLC) powders were first, obtained by applying negative pressure through a three-step procedure. Then, hydroxyl-terminated silicone oil carriers were impregnated into a blend of polydimethylsiloxane (PDMS) and alkoxy-siloxane resin. The fabricated coatings exhibited long-lasting icephobic characteristics, resulting in reduced amount of ice accumulated on the surfaces. This reduction in ice adhesion is related not only to the slippery behavior of the coatings but also the formation of unfrozen hydrogen-bonded molecules. The coatings exhibited desired stability against weathering conditions, such as UV exposure and humidity. The electrical characteristics of the prepared coatings were evaluated using dielectric spectroscopy, flashover, condensation, and inclined plane tests. Accordingly, the coatings containing lubricant-loaded carriers showed increased flashover voltage in dry, wet, and polluted states and reduced leakage currents in the condensation test.

Type de document:Article publié dans une revue avec comité d'évaluation
Pages:p. 9264-9281
Version évaluée par les pairs:Oui
Identifiant unique:10.1007/s10853-023-08600-6
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: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)
Départements et modules > Département des sciences appliquées > Module d'ingénierie
Mots-clés:icephobic surfaces, slippery coatings, hydroxyl-terminated silicone oil, high voltage insulator, leakage current, flashover, Surfaces glaçonphobes, revêtements glissants, huile de silicone à terminaison hydroxyle, isolant haute tension, courant de fuite, contournement
Déposé le:17 août 2023 19:36
Dernière modification:17 août 2023 19:36
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