Ice adhesion to rubber materials

Andersson, Lars-Olof; Gölander, Carl-Gustaf; Persson, Sture

doi:10.1163/156856194x00104

Cited by 58 publications

(27 citation statements)

References 4 publications

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“…A change in the relationship of thickness with P s is suggested by ice adhesion data of Andersson, who determined ice removal strength in shear using a sandwich-like device. 16 Sample 10 (Q) was a peroxide cured PDMS molding compound that was made into plaques 0.9−5.25 mm thick. Interpolating data in Figure 4 of the cited paper 16 indicates the following (t in mm, P s in kPa): 0.90, 300; 1.60, 200; 3.25, 400; 5.25, 200.…”

Section: Focusing Inmentioning

confidence: 99%

“…16 Sample 10 (Q) was a peroxide cured PDMS molding compound that was made into plaques 0.9−5.25 mm thick. Interpolating data in Figure 4 of the cited paper 16 indicates the following (t in mm, P s in kPa): 0.90, 300; 1.60, 200; 3.25, 400; 5.25, 200. There does not seem to be a systematic trend, but despite the different silicone formulation the data suggest there may be an attenuated relationship of thickness and P s at greater thicknesses.…”

Section: Focusing Inmentioning

confidence: 99%

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Thickness Dependence of Ice Removal Stress for a Polydimethylsiloxane Nanocomposite: Sylgard 184

et al. 2014

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Minimizing adhesion of ice has been the subject of extensive studies because of importance to applications such aircraft wings, spacecraft, and power transmission wires. A growing interest concerns coatings for wind turbine blades and refrigeration. Herein, a new laboratory test was employed to obtain the thickness dependence of ice adhesion for Sylgard 184-a filled polydimethylsiloxane elastomer. A correlation between ice adhesion and coating thickness (t) was found that follows a relationship developed by Kendall over 40 years ago for removal of a rigid object from an elastomer. With a 0.05 mm/s probe speed a nearly linear relationship between peak removal stress (Ps) and 1/t(1/2) was obtained with Ps ∼ 460 kPa for an 18 μm coating, decreasing to ∼120 kPa for 533 μm. Preliminary results suggest that below ∼10 μm Ps departs from the 1/t(1/2) correlation while above ∼500 μm a limiting value for Ps may be reached. We previously reported that probe speed has negligible effect on the glassy polymer PMMA. In contrast, probe speed is identified as an important variable for testing ice release on elastomeric Sylgard 184 coatings. While work of adhesion, which is related to surface free energy, is recognized as an important factor that can affect ice release, the results reported herein show that coating thickness can override this single parameter for elastomeric substrates.

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Section: Focusing Inmentioning

confidence: 99%

Section: Focusing Inmentioning

confidence: 99%

Thickness Dependence of Ice Removal Stress for a Polydimethylsiloxane Nanocomposite: Sylgard 184

et al. 2014

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“…With the same trend of the ice adhesion strength, the ice shear strength tended to decrease from 305 kPa to~187 kPa with the reduction of the PDMS content from 50 wt.% to 15 wt.%, significantly lower than the value of the ice adhesion and shear strengths on a commercial polyacrylate-polyurethane coating (~35 kPa and~1200 kPa, respectively). Among all the copolymers, both of the ice adhesion and shear strength values for PF4 were the smallest, exhibiting good icephobic properties, which was mainly attributed to the surface microphase-separated structures and chemical composition of the block copolymers (synergistic effect of silicon and fluorine) [22][23][24]. The microphase separation of PF4 was related to the enrichment of PDMS and fluorinated polyacrylate blocks on the copolymer surface.…”

Section: Resultsmentioning

confidence: 99%

Icephobicity of polydimethylsiloxane-b-poly(fluorinated acrylate)

Luo

et al. 2014

Thin Solid Films

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“…Par ailleurs, en étudiant des surfaces de plastique, des auteurs ont signalé une absence de corrélation entre la force d'adhésion de la glace et l'angle de contact des surfaces [6]. D'autres chercheurs ont développé plusieurs méthodes pour évaluer l'adhérence de la glace à une surface [36,38,[42][43][44][45] …”

Section: Travaux Antérieursunclassified

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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Ice adhesion to rubber materials

Cited by 58 publications

References 4 publications

Thickness Dependence of Ice Removal Stress for a Polydimethylsiloxane Nanocomposite: Sylgard 184

Thickness Dependence of Ice Removal Stress for a Polydimethylsiloxane Nanocomposite: Sylgard 184

Icephobicity of polydimethylsiloxane-b-poly(fluorinated acrylate)

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

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