Journal article
Exploiting intermediate wetting on superhydrophobic surfaces for efficient icing prevention
Journal of colloid and interface science, v 670, pp 550-562
11 May 2024
PMID: 38776690
Abstract
[Display omitted]
Superhydrophobic surfaces can effectively prevent the freezing of supercooled droplets in technological systems. Droplets on superhydrophobic surfaces commonly not only wet the top asperities (Cassie State), but also partially penetrate into microstructure due to surface properties, environment, and droplet impact occurring in real-world applications. Implications on ice nucleation can be expected and are little explored. It remains elusive how anti-icing surfaces can be designed to exploit intermediate wetting phenomena.
We utilized engineered micro-/nanostructures, specifically micropillars, to modulate the wetting fraction in the microstructure. The behavior of intermediate wetting with supercooling and resulting implications on ice nucleation delay when potential nucleation sites are formed in the microcavities were investigated using experimental, theoretical, and simulation components.
The temperature-dependent wetting fraction in the microstructure increased at supercooled temperatures, partly activated by condensation in the microcavities. At −10/−20 °C, a critical wetting fraction led to maximum ice nucleation delays, with experimental results consistent with theoretical predictions. This critical wetting fraction minimized the effective contact area solid-to-liquid along the partially wetted microstructure. The study establishes physical relations between ice nucleation delays, geometrical surface parameters and wettability properties in the intermediate wetting regime, providing guidance for the design of ice resistant microstructured surfaces.
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9 citations in Scopus
Details
- Title
- Exploiting intermediate wetting on superhydrophobic surfaces for efficient icing prevention
- Creators
- Samaneh Keshavarzi - Université du Québec à ChicoutimiGelareh Momen - Université du Québec à ChicoutimiPatric Eberle - Lucerne University of Applied Sciences and ArtsAmir Azimi Yancheshme - Chemical and Biological Engineering Department, Drexel University, Philadelphia, USANicolas J. Alvarez - Drexel UniversityReza Jafari - Université du Québec à Chicoutimi
- Publication Details
- Journal of colloid and interface science, v 670, pp 550-562
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemical and Biological Engineering
- Scopus ID
- 2-s2.0-85193638106
- Other Identifier
- 991021880288204721