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Soft wetting with (a)symmetric Shuttleworth effect
C Henkel1, M H Essink2, T Hoang2
1Institut für Theoretische Physik, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Str. 9, Münster 48149, Germany.
Proceedings. Mathematical, Physical, and Engineering Sciences
|August 8, 2022
Summary
Wetting soft polymers is complex due to substrate deformation and the Shuttleworth effect. Our models reveal how this effect
Area of Science:
- Soft Matter Physics
- Surface Science
- Polymer Science
Background:
- Wetting on rigid substrates follows Young's Law, but soft substrates exhibit complex behaviors.
- Deformations and surface energy variations (Shuttleworth effect) significantly alter wetting phenomena.
- Understanding these effects is crucial for applications involving liquid-solid interactions on elastic materials.
Purpose of the Study:
- To develop and compare two models for exploring liquid drop wetting on soft polymer substrates.
- To investigate the influence of a strong Shuttleworth effect on wetting equilibrium and dynamics.
- To elucidate the role of surface-elasticity in governing substrate deformations during wetting.
Main Methods:
- A macroscopic model using neo-Hookean elasticity for large deformations.
- A mesoscopic model with a reduced description of substrate elasticity, enabling gradient dynamics.
- Comparative analysis of equilibrium states predicted by both models.
Main Results:
- The asymmetry of the Shuttleworth effect dictates horizontal substrate deformations.
- Both models predict robust features of soft wetting under strong Shuttleworth effect conditions.
- The interplay between bulk/surface deformations and surface-elasticity governs wetting behavior.
Conclusions:
- The Shuttleworth effect is a key factor in soft wetting, influencing substrate deformation.
- The developed models provide insights into the complex physics of wetting on elastic interfaces.
- Results align with experimental observations on the wettability of stretched polymer substrates.
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