The reduction in ice adhesion using controlled topography superhydrophobic coatings / Yujie Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 2 (03/2023)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 469-483 Titre : The reduction in ice adhesion using controlled topography superhydrophobic coatings Type de document : texte imprimé Auteurs : Yujie Wang, Auteur ; Jinde Zhang, Auteur ; Hanna Dodiuk, Auteur ; Samuel Kenig, Auteur ; Jo Ann Ratto, Auteur ; Carol Barry, Auteur ; Joey Mead, Auteur Année de publication : 2023 Article en page(s) : p. 469-483 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion Caractérisation Epoxydes Fluoroalkylsilane Hydrophobie Interfaces solide-liquide Liants Mouillage (chimie des surfaces) Nanoparticules Revêtements organiques Silice La silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux. La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...). Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale. Topographie Index. décimale : 667.9 Revêtements et enduits Résumé : Since ice formation on surfaces at subzero temperatures leads to accidents, increased equipment maintenance costs, and reduced performance, multiple strategies, including superhydrophobic surfaces and coatings, have been explored as means to reduce ice adhesion to solid surfaces. Previous work has correlated the effect of topography of regularly patterned superhydrophobic surfaces with ice adhesion. This work, however, investigated the effect of filtered topography on ice adhesion for random superhydrophobic surfaces. The ice adhesion behavior of superhydrophobic composite coatings, prepared from a mixture of silica nanoparticles and polymer binder and sprayed on glass slides, was determined using a shear strength measurement. The ice adhesion significantly decreased with an increase in particle content up to 40 wt.%, after which the ice adhesion became nearly constant. The present study focuses on the use of a novel filtering method for coating topography evaluation which isolated the asperities contributing to the interface from the roughness profile in the superhydrophobic coating. It showed that the ice adhesion correlated with the filtered asperity height and spacing for these random hydrophobic surfaces. Higher particle contents led to larger asperity distances, smaller solid fractions, and lower ice adhesion. The results and conclusions are based on a static ice adhesion test using still water. In this work, it is demonstrated that ice adhesion can be predicted based on the solid–water–air interface, a correlation that could guide future superhydrophobic coating fabrication to create surfaces with greater reduction in ice adhesion. Note de contenu : - Materials - Preparation of SHP coatings - Surface wetting characterization - Visualization of solid-water interface - Ice shear adhesion strength measurement - Topography characterization - Table 1 : Composition of SHP coatings with different particle contents - Table 2 : Measured topographical parameters of defined asperities and particle content - Table 3 : Definition of design parameters in this work - Table 4 : Design parameters for the SHP surfaces DOI : https://doi.org/10.1007/s11998-022-00682-2 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00682-2.pdf?pdf=button% [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39292 [article]

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