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A comparative study of the icephobic and self-cleaning properties of Teflon materials having different surface morphologies

Vazirinasab E., Maghsoudi K., Jafari Reza et Momen Gelareh. (2020). A comparative study of the icephobic and self-cleaning properties of Teflon materials having different surface morphologies. Journal of Materials Processing Technology, 276, p. 116415.

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URL officielle: http://doi.org/10.1016/j.jmatprotec.2019.116415

Résumé

Materials having fluorocarbon bonds are among the best candidates for the fabrication of superhydrophobic surfaces. Here, we describe two facile, non-expensive, and industrialized approaches to produce superhydrophobic Teflon materials having ultra-water repellency, icephobic, and self-cleaning properties. Direct replication and plasma-treatment approaches produced Teflon sheets having very different surface patterns, i.e. microstructures and micro- nanostructures. Neither approach altered the chemical composition of the original Teflon surfaces. Rice leaf–like microstructures were produced on the replicated surface, whereas lotus leaf–like hierarchical micro-nanostructures characterized the plasma-treated surface. Water droplets rolled off the micro-nanostructured surfaces ~10% faster than off the microstructured surfaces. The micro-nanostructured surface also produced more rebounds for a water droplet during the impact test. Although both surfaces possessed similar self-cleaning properties, the micro-nanostructured surface reduced ice adhesion to a greater degree than the microstructured surface. The more effective ice repellency of the micro-nanostructured surface was due to its surface morphology that reduced the interlocking of ice inside the surface asperities. However, the microstructured surface delayed considerably the onset of freezing of a water droplet due to the larger micro-air pockets trapped within its surface asperities.

Type de document:Article publié dans une revue avec comité d'évaluation
ISSN:09240136
Volume:276
Pages:p. 116415
Version évaluée par les pairs:Oui
Date:2020
Identifiant unique:10.1016/j.jmatprotec.2019.116415
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
Mots-clés:Teflon surface, icephobic, self-cleaning, surface morphology, freezing delay, ice adhesion reduction, surface en téflon, glaciophobe, autonettoyante, morphologie de la surface, retard de congélation, réduction de l'adhérence de la glace
Déposé le:12 mars 2020 01:26
Dernière modification:12 mars 2020 01:26
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