In-situ icing and water condensation study on different topographical surfaces

Memon, Halar; Liu, Junpeng; Weston, Nicola; Wang, Jie; Focatiis, Davide S.A. De; Choi, Kwing-So; Hou, Xianghui

doi:10.1016/j.coldregions.2019.102814

Cited by 15 publications

(12 citation statements)

References 59 publications

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“…A partial correlation of CAHs was observed on surface roughness (R a ) below 0.5 lm on the studied surfaces and the receding water contact angles also followed a similar trend, as shown in supplementary figures S1 and S2. Similar findings were also reported in our previous work [20,21]. The partial correlation of CAHs on ice adhesion suggests a dominant role of surface wettability, whereas the mechanical forces may add up on surfaces roughness above 0.5 lm due to a higher interfacial contact with the surface.…”

Section: Influence Of Contact Angle Hysteresis On the Ice Adhesionsupporting

confidence: 90%

“…The aluminium and stainless steel plate samples were smoothened using grinding and polishing techniques with a series of steps employing sandpapers having grits sizes of 220, 320, 400, and 600, 1 lm polishing cloths, and 0.25 lm (chemically induced) polishing cloths using Metprep colloidal silica suspension particles, respectively. The grinding and polishing techniques are detailed in the reference [20,21]. The Al-SB/SS-SB samples were roughened in a Guyson F1200 sandblaster system using Guyson 180-220 lm alumina particles.…”

Section: Preparation Of Coatingsmentioning

confidence: 99%

“…The TPU-based coatings were developed, and the nanoparticles were functionalised using methods mentioned reported previously [20,21]. All the coating solutions were magnetically stirred in a vial for 60 min, followed by 30 min of ultrasonic mixing.…”

Section: Preparation Of Coatingsmentioning

confidence: 99%

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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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Section: Influence Of Contact Angle Hysteresis On the Ice Adhesionsupporting

confidence: 90%

Section: Preparation Of Coatingsmentioning

confidence: 99%

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

et al. 2021

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“…In our previous work [44], the anchoring mechanism on rough surfaces was observed and validated using in-situ water condensation and icing observation. The results indicated the dependence of ice adhesion strength with surface morphology.…”

Section: Introductionmentioning

confidence: 91%

Intrinsic dependence of ice adhesion strength on surface roughness

Memon

Liu

Focatiis

et al. 2020

Surface and Coatings Technology

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The roles of surface roughness on icephobicity including ice adhesion strength have been long debated in icephobicity studies. However, the direct/systematic influence of surface roughness on ice adhesion strength while keeping other surface characteristics such as surface wettability and interfacial cavitation unchanged are seldom reported. In this paper, systematic reduction of ice adhesion strength with the decrease in surface roughness regardless of the surface wettability was demonstrated across all the studied material types, i.e. metallic surfaces and polymeric coatings with different surface wettability. In-situ icing observation studies indicated that the ice did not anchor on smooth metallic surfaces and polymeric coatings but anchored on rough surfaces including superhydrophobic coatings. Effect of surface wettability was argued against the ice adhesion strength based on our results and similar ice adhesion strength was found on materials having different wettability (i.e. hydrophilic and hydrophobic coatings, and surfaces having different contact angle hysteresis). On the contrary, the introduction of low surface energy chemicals (via deposition and/or functionalization) on the surface having similar surface roughness showed a direct reduction of ice adhesion strength. These results indicated the surface roughness is vital in achieving icephobic performance, however, the ultra-low ice adhesion strength could be achieved by the synergetic effect of low surface roughness and low interfacial cavitation (in line with the interfacial correlation factor).

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“…In this work, the combination of physical and chemical surface modifications was chosen for the preparation of icephobic surfaces. The surface roughening and the presence of nonpolar functional groups can lead to superhydrophobic surfaces with water droplets in Cassie–Baxter wettability status, which minimizes the surface contact by suspending the water droplets on the air pockets or void valleys on the surface. − We use the surface modification by electrochemical etching combined with subsequent grafting of fluoro-containing moieties with the aim to introduce icephobic properties on PEEK/CF composite, one of the most relevant composites in the technical field. The schematic representation of our concept is given in Figure .…”

Section: Results and Discussionmentioning

confidence: 99%

Versatile and Scalable Icephobization of Airspace Composite by Surface Morphology and Chemistry Tuning

Idriss

Guselnikova

Postnikov

et al. 2020

ACS Appl. Polym. Mater.

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The design of the icephobic surface represents an urgent challenge in the field of surface engineering with high application potential. In this work, we proposed the introduction of icephobic surface properties on the technically relevant materialpolyetheretherketone/carbon fibers (PEEK/CF) composite. The developed method utilizes the simple and scalable electrochemical etching to induce a significant increase of surface roughness and subsequent chemical grafting for attachment of hydrophobic fluoro-containing chemical moieties. The surface morphology was characterized at different scales, using the profilometer, confocal microscopy, and atomic force microscopy (AFM) measurements. The success of chemical grafting was confirmed using the X-ray photoelectron spectroscopy (XPS) and infrared spectroscopy (IR) measurements. The surface properties were tuned to reach the superhydrophobic and Cassie–Baxter water drop states, minimizing the contact area between the drop and sample surface. The icephobic surface properties were tested through the measurements of the time delay of ice formation, precooled drop slipping, and estimation of ice removal force. It was convincingly demonstrated that optimal combination of physical and chemical treatment allows us reaching the icephobic properties on PEEK/CF composite. The main advantages of proposed procedure are its simplicity and scalability, which makes it highly attractive for the practical introduction of icephobic properties in the field of aircraft materials.

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In-situ icing and water condensation study on different topographical surfaces

Cited by 15 publications

References 59 publications

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

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

Intrinsic dependence of ice adhesion strength on surface roughness

Versatile and Scalable Icephobization of Airspace Composite by Surface Morphology and Chemistry Tuning

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