Verification of icephobic/anti-icing properties of a superhydrophobic surface

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Journal titleACS Applied Materials and Interfaces
Pages33703381; # of pages: 12
Subjectice-repellent; Impact dynamics; Sliding angle; Super-hydrophobic surfaces; Superhydrophilic surface; Superhydrophobic; Surface wettability; Water contact angle; Adhesion; Atmospheric humidity; Coatings; Contact angle; High speed photography; Ice; Surface properties; Temperature; Wetting; Hydrophobicity
AbstractFour aluminum surfaces with wettability varied from superhydrophilic to superhydrophobic were prepared by combining an etching and a coating process. The surface wettability was checked in terms of water contact angle (CA) and sliding angle (SA) under different humidity at -10 C. High-speed photography was applied to study water droplet impact dynamics on these surfaces. It was found that single and successive water droplets could rebound on the superhydrophobic surface and roll off at a tilt angle larger than 30 under an extremely condensing weather condition (-10 C and relative humidity of 85-90%). In addition, the superhydrophobic surface showed a strong icephobic property, the ice adhesion on this surface was only 13% of that on the superhydrophilic surface, though they had a similar nano/microtopological structure. Moreover, this superhydrophobic surface displayed an excellent durability of the icephobic property. The ice adhesion only increased to 20% and 16% of that on the superhydrophobic surface after the surface was undergone 20 icing/ice-breaking cycles and 40 icing/ice-melting cycles, respectively. Surface profile and XPS studies on these surfaces indicated a minor damage of the surface nano/microstructure and the coating layer upon these multiple ice-breaking and ice-melting processes. Therefore, this superhydrophobic surface could be a good candidate for icephobic applications. © 2013 American Chemical Society.
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AffiliationNational Research Council Canada (NRC-CNRC); Security and Disruptive Technologies (SDT-TSR)
Peer reviewedYes
NPARC number21269978
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Record identifier0309377e-958f-4bb7-8628-f27804b6bc9f
Record created2013-12-13
Record modified2016-05-09
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