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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
PubMed
Summary
This summary is machine-generated.

Wetting soft polymers is complex due to substrate deformation and the Shuttleworth effect. Our models reveal how this effect

Keywords:
Shuttleworthelasticityresearchsoftsoft wettingwetting

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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.