Advanced Icephobic Coatings

Menini, Richard; Farzaneh, M.

doi:10.1163/016942410x533372

Cited by 146 publications

(109 citation statements)

References 76 publications

(93 reference statements)

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“…L'adhésion de la glace peut aussi être due à l'ancrage mécanique à l'interface entre la glace et le matériau [17][18]. La littérature révèle qu'à l'interface glace/matériau, une combinaison de quatre facteurs est impliquée dans cette adhésion [19][20], On cite notamment les forces électrostatiques, les forces de van der Waals, les liaisons hydrogène et l'ancrage mécanique. De surcroit, la présence de la couche quasi-liquide peut influencer significativement l'adhésion de la glace à une surface.…”

Section: Travaux Antérieursunclassified

“…Des études ont été menées pour tenter de comprendre le rôle de la rugosité d'une surface solide sur l'adhésion de la glace en utilisant le concept de la superhydrophobicité [7,17,20], En présence de forts degrés de rugosité, une diminution de l'adhésion de la glace a été remarquée. Cette diminution est liée à la présence de bulles d'air à l'interface de la glace et du substrat [28][29][30][31][32][33].…”

Section: Travaux Antérieursunclassified

“…Certains revêtements sont censés adhérer faiblement à la glace [3,20] et réduire considérablement l'accumulation de glace ou de neige. Depuis plusieurs années, un grand nombre de recherches ont été menées en vue de développer ces revêtements et divers matériaux ont été étudiés [3-4, 7, 28-33, 35-40].…”

Section: Travaux Antérieursunclassified

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Contribution à l'étude des mécanismes de l'adhésion de la glace à différents matériaux et application à l'évaluation des matériaux glaciophobes /

Ghalmi¹

2013

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Several Nordic countries with cold climates like Canada are often subjected to ice storms causing major economic and social losses. Ice or sticky snow adhesion on power network equipment can be a significant issue in transmission and distribution of electrical energy for companies operating in these regions. The costs of such events can be substantial, particularly due to the cessation of economic activities, equipment failures, deicing techniques (active methods), and population safety. Because of such events, power companies have understood the need to develop so-called superhydrophobic and/or icephobic surfaces, which can significantly reduce ice adhesion (passive methods). Several studies have led to the development of a variety of new nanostructured surfaces using various strategies. These studies have led to the design of superhydrophobic surfaces with contact angles greater than 150 and low ice adhesion strength.In order to optimally reduce the ice adhesion strength on different substrates, better understanding of the various mechanisms involved in the icing process is essential. It is in this context and within the framework of Canada's research chair on atmospheric icing of power networks (INGIVRE) that this thesis was carried out, aiming to improve the knowledge of atmospheric icing, and explain the forces involved at the ice/substrate interface. Furthermore, the effect of contact angle, surface roughness and porosity on icing and ice/substrate interface was investigated.This study clearly showed that the electrostatic, van der Waals and hydrogen bond forces are the main contributors to ice adhesion to a surface at the molecular level. The electrostatic energy, based on the principle of image charge, depends on the type of material in contact with the ice, the distance between the ice and the material, and the types of ice surface defects. The van der Waals energy depends on the material type, the thickness of the liquid water layer, and the temperature. For its part, the energy associated with hydrogen bonds depends on the material type, temperature, droplet mass, as well as on IV the static and sliding contact angles. Among these three forces, the electrostatic energy is the largest. Whereas the hydrogen bond energy is larger than the van der Waals energy. However, the latter is always present as long as ice is in contact with a solid surface.The experimental study showed that ice adhesion strength depends on the surface roughness of the substrate. In the case of metals with a thin natural protective oxide layer, higher roughness leads to higher ice adhesion strength. In other words, polished metallic surfaces exhibit lower ice adhesion strengths. However, in the case of anodized aluminum surfaces coated with PTFE, the roughened needle-like structure resulted in lower ice adhesion. The experimental results showed that PTFE coatings remain resistant to icing/deicing cycles. Even after 15 icing/deicing cycles, surfaces remain hydrophobic with a static contact angle greater than 130°. LISTE ...

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Section: Travaux Antérieursunclassified

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Contribution à l'étude des mécanismes de l'adhésion de la glace à différents matériaux et application à l'évaluation des matériaux glaciophobes /

Ghalmi¹

2013

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“…In these contexts, droplets usually evolve from a phase change on a cold substrate, and significant research is directed toward understanding the vapor condensation, deposition or liquid freezing processes in order to mitigate formation on the material surface. Most substrates tested exhibit varying degrees of hydrophobicity since anti-wetting or ice-shedding characteristics are desirable for a wide variety of applications, especially those wishing to prevent water or ice accumulation [4,5]. Interestingly, relatively less attention has been focused on the melting of a frozen droplet on such surfaces, which is especially relevant considering that active heating is a common anti-icing technique.…”

Section: Introductionmentioning

confidence: 99%

Ice-dependent liquid-phase convective cells during the melting of frozen sessile droplets containing water and multiwall carbon nanotubes

Ivall

Renault-Crispo

Coulombe

et al. 2016

International Journal of Heat and Mass Transfer

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“…Moreover, hydrophobic surfaces have low power consumption and no external instrumentation. A common strategy for minimizing ice formation and adhesion is the application of chemical coatings to vulnerable surfaces (Antonini et al, 2011;Boinovich et al, 2013;Chen et al, 2013;Jafari et al, 2010;Korpiniemi et al, 2014;Li et al, 2012;Menini and Farzaneh, 2011;Qiqi and Liyuan, 2012;Sarkar and Farzaneh, 2009;Wang et al, 2012;Zhu et al, 2013). However, chemical coatings may suffer from mechanical damage, such as scratches and abrasions.…”

Section: Introductionmentioning

confidence: 99%