Measuring Surface Tensions of Soft Solids with Huge Contact-Angle Hysteresis

Kim, Jin Young; Kröger, Martin; Gerber, Dominic; Bain, Nicolas; Dufresne, Eric R.; Style, Robert W.

doi:10.1103/physrevx.11.031004

Cited by 17 publications

(12 citation statements)

References 54 publications

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“…Our results generalize this observation for substrates of arbitrary softness, including the possibility of large elastic deformations. We remark that very large tangential displacements were recently observed for wetting of drops on hydrogels [56]. In that case, however, there was also a strong contact angle hysteresis.…”

Section: Discussionsupporting

confidence: 53%

Soft wetting with (a)symmetric Shuttleworth effect

et al. 2022

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The wetting of soft polymer substrates brings in multiple complexities when compared with the wetting on rigid substrates. The contact angle of the liquid is no longer governed by Young’s Law, but is affected by the substrate’s bulk and surface deformations. On top of that, elastic interfaces exhibit a surface energy that depends on how much they are stretched—a feature known as the Shuttleworth effect (or as surface-elasticity). Here, we present two models through which we explore the wetting of drops in the presence of a strong Shuttleworth effect. The first model is macroscopic in character and consistently accounts for large deformations via a neo-Hookean elasticity. The second model is based on a mesoscopic description of wetting, using a reduced description of the substrate’s elasticity. While the second model is more empirical in terms of the elasticity, it enables a gradient dynamics formulation for soft wetting dynamics. We provide a detailed comparison between the equilibrium states predicted by the two models, from which we deduce robust features of soft wetting in the presence of a strong Shuttleworth effect. Specifically, we show that the (a)symmetry of the Shuttleworth effect between the ‘dry’ and ‘wet’ states governs horizontal deformations in the substrate. Our results are discussed in the light of recent experiments on the wettability of stretched substrates.

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Section: Discussionsupporting

confidence: 53%

Soft wetting with (a)symmetric Shuttleworth effect

et al. 2022

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“…Our results generalise this observation for substrates of arbitrary softness, including the possibility of large elastic deformations. We remark that very large tangential displacements were recently observed for wetting of drops on hydrogels [53]. In that case, however, there was also a strong contact angle hysteresis.…”

Section: Discussionsupporting

confidence: 47%

Soft wetting with (a)symmetric Shuttleworth effect

Henkel,

Essink,

Hoang

et al. 2022

Preprint

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The wetting of soft polymer substrates brings in multiple complexities as compared to the wetting on rigid substrates. The contact angle of the liquid is no longer governed by Young's law, but is affected by the substrate's bulk and surface deformations. On top of that, elastic interfaces exhibit a surface energy that depends on how much they are stretched -a feature known as the Shuttleworth effect (or as surface-elasticity). Here we present two models by which we explore the wetting of drops in the presence of a strong Shuttleworth effect. The first model is macroscopic in character and consistently accounts for large deformations via a neo-Hookean elasticity. The second model is based on a mesoscopic description of wetting, using a reduced description of the substrate's elasticity. While the second model is more empirical in terms of the elasticity, it enables a gradient dynamics formulation for soft wetting dynamics. We provide a detailed comparison between the equilibrium states predicted by the two models, from which we deduce robust features of soft wetting in the presence of a strong Shuttleworth effect. Specifically, we show that the (a)symmetry of the Shuttleworth effect between the "dry" and "wet" states governs horizontal deformations in the substrate. Our results are discussed in the light of recent experiments on the wettability of stretched substrates.

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“…Given recent work on monolayers with variable cell-cell tensions leading to tissue fluidization ( Kim et al., 2021 ; Krajnc, 2020 ; Yamamoto et al., 2020 ), we next wondered if the fluid subtype in our model of demixing aggregates shows large surface tension variability. We therefore assessed, using vertex modeling, the variability in surface tensions (also called edge tensions in vertex models) that arise in a mixed population of more fluid (large shape index) and more solid (small shape index) cells.…”

Section: Resultsmentioning

confidence: 99%