Durability enhancement of low ice adhesion polymeric coatings

Memon, Halar; Focatiis, Davide S.A. De; Choi, Kwing-So; Hou, Xianghui

doi:10.1016/j.porgcoat.2020.106033

Cited by 18 publications

(13 citation statements)

References 39 publications

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“…The mechanical damage of surfaces was probably caused by consecutive detachment actions of mixed glaze ice, which is characterised by stronger adhesion to surfaces compared to other types of ice [52,53]. This resulted in increased ice adhesion strength over the cycles, as reported in previous studies [46,54,55]. However, we can notice the presence of a few scratches already before icing, as shown in Figure 3.…”

Section: Morphological and Topographical Propertiessupporting

confidence: 66%

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Durability of Lubricated Icephobic Coatings under Multiple Icing/Deicing Cycles

Donadei

Koivuluoto

Sarlin

et al. 2021

Thermal Spray 2021: Proceedings From the International Thermal Spray Conference

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In subzero conditions, atmospheric ice naturally accretes on surfaces in outdoor environments. This accretion can compromise the operational performance of several industrial applications, such as wind turbines, power lines, aviation, and maritime transport. To effectively prevent icing problems, the development of durable icephobic coating solutions is strongly needed. Here, the durability of lubricated icephobic coatings was studied under repeated icing/deicing cycles. Lubricated coatings were produced in one-step by flame spraying with hybrid feedstock injection. The coating icephobicity was investigated by accreting ice from supercooled microdroplets using an icing wind tunnel. The ice adhesion strength was evaluated by a centrifugal ice adhesion tester. The icing performance was investigated over four icing/deicing cycles. Surface properties of coatings, such as morphology, topography, chemical composition and wettability, were analyzed before and after the cycles. The results showed an increase in ice adhesion over the cycles, while a stable icephobic behaviour was retained for one selected coating. Moreover, consecutive ice detachment caused a surface roughness increase. This promotes the formation of mechanical interlocking with ice, thus justifying the increased ice adhesion. Finally, the coating hydrophobicity mainly decreased as a consequence of the damaged surface topography. In summary, lubricated coatings retained a good icephobic level after the cycles, thus demonstrating their potential for icephobic applications.

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Section: Morphological and Topographical Propertiessupporting

confidence: 66%

“…This increase in surface roughness might be justified by the mechanical damage produced during ice detachment. The damage rendered the icing cycled surfaces rougher than the as-sprayed ones, thus resulting in increased surface roughness [54].…”

Section: Morphological and Topographical Propertiesmentioning

confidence: 99%

Durability of Lubricated Icephobic Coatings under Multiple Icing/Deicing Cycles

Donadei

Koivuluoto

Sarlin

et al. 2021

Thermal Spray 2021: Proceedings From the International Thermal Spray Conference

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“…However, Alder et al indicated that fatigue plays a secondary role and concluded that the topological changes (microstructural discontinuities) or stress concentrations on the cracks during the incubation period are the main factors that accelerate the erosion rate. Thus, minimizing the surface damage is the key to achieving the lasting icephobic performance, as it will mitigate the erosion rate, as well as provide a minimal number of possible ice anchoring points . In this paper, the impingement test consists of a mixture of water with hard SiC particles, and the particles could inflict more damage as compared to that of water droplets.…”

Section: Results and Discussionmentioning

confidence: 99%

“…Thus, minimizing the surface damage is the key to achieving the lasting icephobic performance, as it will mitigate the erosion rate, as well as provide a minimal number of possible ice anchoring points. 40 In this paper, the impingement test consists of a mixture of water with hard SiC particles, and the particles could inflict more damage as compared to that of water droplets. The results conducted in this work indicate that the crack initiations to be a lead factor as the reinforced fiber composites demonstrated fewer surface anomalies after the erosion tests.…”

Section: Surface Analysis After Erosionmentioning

confidence: 99%

Toward Exceptional Icephobicity with Chionophile-Inspired Durable Biomimetic Coatings

Memon

Focatiis

Choi

et al. 2021

ACS Appl. Polym. Mater.

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Liquid-infused polymeric surfaces have demonstrated promising icephobicity. However, the capability to maintain the icephobic performance after material damage has been a challenge, both in terms of conserving a smoother surface and the replenishment of the infused liquid. Cetacean skin possesses a microscopically smooth texture in the form of cells lubricated with lipid proteins and consists of structural fibers that ensure durability. Concerning the structure of cetacean skin, glycerol-infused fiber-reinforced polyurethane (GIFRP) coatings were proposed. Instead of hosting the lipid proteins, the coatings were infused with glycerol, a known cryoprotectant to induce the supercooling of water, a strategy inspired by wood frogs and red flat dark beetles to prevent freezing. The inclusion of glycerol delayed water droplet freezing duration by 659%, while negligible frost accumulated on the fabricated coatings during anti-icing tests. The reinforcement of fibers was effective and the surface damage was reduced by a factor of 4, compared to the pure polyurethane coatings after erosion impact. The incorporation of fibers has proven to be beneficial for infused-liquid replenishment and the slow-releasing capabilities of GIFRP coatings. Minimized surface deterioration and the continued presence of glycerol on GIFRP coatings demonstrated a small increase in ice adhesion from 0.22 to 0.77 kPa after the erosion tests, one of the lowest values reported in the literature after substantial surface damage. The concept inspired by cetacean skin and the cryoprotective features of chionophiles was instrumental in keeping the ice adhesion under 1 kPa after erosion impact.

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“…The roughness values reported were the average of a minimum of 30 measurements, and R a was measured over a line stretching across the observed surface. The measurement method has been described elsewhere [23].…”

Section: Surface Characterisationmentioning

confidence: 99%

Comparative study on the influence of surface characteristics on de-icing evaluation

et al. 2021

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A comparative study of de-icing evaluation methods was conducted in this work, and their variations in response to surface characteristics were investigated. The mechanical de-icing measurements include centrifugal, push, and tensile methods. The centrifugal and the horizontal push (shear) methods suggested a linear relationship of ice adhesion strength with surface roughness, whereas the tensile (normal) method indicated an inverse curvilinear relationship with contact angle hysteresis. A partial correlation of contact angle hysteresis on the shear-based methods was also indicated over a specified range of surface roughness. Further attempts were also made on 1H,1H,2H,2H-perfluorooctyltriethoxysilane-coated surfaces, and the ice adhesion indicated a clear reduction in the normal de-icing method, whereas the shear-based methods did not show a considerable change in ice adhesion, highlighting their mechanical forces-centric response. Lastly, a further evaluation using a hybrid de-icing method was conducted, to verify the influence of surface characteristics on ice removal involving heating, which demonstrated a partial correlation of energy consumption with the ice adhesion strength over a specified range of surface roughness. The results obtained in this study provide crucial information on the influence of surface characteristics on ice adhesion and offer material-dependent correlations of the popular de-icing evaluation methods. The conclusions could be applied to define an appropriate testing method for the evaluation of icephobic surfaces and coatings. Graphical abstract

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Durability enhancement of low ice adhesion polymeric coatings

Cited by 18 publications

References 39 publications

Durability of Lubricated Icephobic Coatings under Multiple Icing/Deicing Cycles

Durability of Lubricated Icephobic Coatings under Multiple Icing/Deicing Cycles

Toward Exceptional Icephobicity with Chionophile-Inspired Durable Biomimetic Coatings

Comparative study on the influence of surface characteristics on de-icing evaluation

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