Hypothesis Soft materials are promising candidates for designing passive de-icing systems. It is unclear whether low adhesion on soft surfaces is due to elasticity or lubrication, and how these properties affect the ice detachment mechanism. This study presents a systematic analysis of ice adhesion on soft materials with different lubricant content to better understand the underpinning interaction. Experiments The wetting and mechanical properties of soft polydimethylsiloxane with different lubricant content were thoroughly characterized by contact angle, indentation, and rheology measurements. The collected information was used to understand the relationship with the ice adhesion results, obtained by using different ice block sizes. Findings Three different de-icing mechanisms were identified: (i) single detachment occurs when small ice blocks are considered, and the ice completely detaches in a single event. In the case of larger ice blocks, the reattachment of the ice block is promoted by either: (ii) stick–slip or, (iii) interfacial slippage, depending on the lubricant content. It was confirmed that the ice adhesion strength is not a material property, since it depends on the ice block size. As such, differently than on hard surfaces, where wetting primarily determines the icephobic performance, also elasticity and lubrication need to be considered on soft surfaces.

Anny, O., Stendardo, L., Tagliaro, I., Antonini, C., Tosatti, S., Ibáñez-Ibáñez Pablo, F. (2024). Low ice adhesion on soft surfaces: Elasticity or lubrication effects?. JOURNAL OF COLLOID AND INTERFACE SCIENCE [10.1016/j.jcis.2024.08.042].

Low ice adhesion on soft surfaces: Elasticity or lubrication effects?

Ospina Anny
Primo
;
Stendardo Luca;Tagliaro Irene
;
Antonini Carlo
;
2024

Abstract

Hypothesis Soft materials are promising candidates for designing passive de-icing systems. It is unclear whether low adhesion on soft surfaces is due to elasticity or lubrication, and how these properties affect the ice detachment mechanism. This study presents a systematic analysis of ice adhesion on soft materials with different lubricant content to better understand the underpinning interaction. Experiments The wetting and mechanical properties of soft polydimethylsiloxane with different lubricant content were thoroughly characterized by contact angle, indentation, and rheology measurements. The collected information was used to understand the relationship with the ice adhesion results, obtained by using different ice block sizes. Findings Three different de-icing mechanisms were identified: (i) single detachment occurs when small ice blocks are considered, and the ice completely detaches in a single event. In the case of larger ice blocks, the reattachment of the ice block is promoted by either: (ii) stick–slip or, (iii) interfacial slippage, depending on the lubricant content. It was confirmed that the ice adhesion strength is not a material property, since it depends on the ice block size. As such, differently than on hard surfaces, where wetting primarily determines the icephobic performance, also elasticity and lubrication need to be considered on soft surfaces.
Articolo in rivista - Articolo scientifico
Icephobicity; Anti-icing surface; Liquid infused; Hydrophobicity; Adaptative wetting; PDMS
English
15-lug-2024
2024
open
Anny, O., Stendardo, L., Tagliaro, I., Antonini, C., Tosatti, S., Ibáñez-Ibáñez Pablo, F. (2024). Low ice adhesion on soft surfaces: Elasticity or lubrication effects?. JOURNAL OF COLLOID AND INTERFACE SCIENCE [10.1016/j.jcis.2024.08.042].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/496319
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