Surface energy of strained amorphous solids

Abstract

Surface stress and surface energy are fundamental quantities which characterize the interface between two materials. Although these quantities are identical for interfaces involving only fluids, the Shuttleworth effect demonstrates that this is not the case for most interfaces involving solids, since their surface energies change with strain. Crystalline materials are known to have strain dependent surface energies, but in amorphous materials, such as polymeric glasses and elastomers, the strain dependence is debated due to a dearth of direct measurements. Here, we utilize contact angle measurements on strained glassy and elastomeric solids to address this matter. We show conclusively that interfaces involving polymeric glasses exhibit strain dependent surface energies, and give strong evidence for the absence of such a dependence for incompressible elastomers. The results provide fundamental insight into our understanding of the interfaces of amorphous solids and their interaction with contacting liquids.

arXiv comment8 pages, 4 figures

References in corpus (9)

• Universal deformation of soft substrates near a contact line and the direct measurement of solid surface stresses
• Direct Measurement of Strain-dependent Solid Surface Stress
• Capillary Pressure and Contact Line Force on a Soft Solid
• Solid Capillarity: When and How does Surface Tension Deform Soft Solids?
• Soft wetting and the Shuttleworth effect, at the crossroads between thermodynamics and mechanics
• Role of uncrosslinked chains in droplets dynamics on silicone elastomers
• Elastocapillary Levelling of Thin Viscous Films on Soft Substrates
• Capillarity of soft amorphous solids: a microscopic model for surface stress
• Elastocapillary deformations on partially-wetting substrates: rival contact-line models

Cited by in corpus (19)

• The paradox of contact angle selection on stretched soft solids
• Dynamic solid surface tension causes droplet pinning and depinning
• Wetting on Silicone Surfaces
• Gradient-dynamics model for liquid drops on elastic substrates
• Droplets sit and slide anisotropically on soft, stretched substrates
• Surface tension and the strain-dependent topography of soft solids
• The role of crosslinking density in surface stress and surface energy of soft solids
• Soft wetting with (a)symmetric Shuttleworth effect
• Measuring surface tensions of soft solids with huge contact-angle hysteresis
• The mechanical equilibrium of soft solids with surface elasticity
• On the singular nature of the elastocapillary ridge
• Contact lines on stretched soft solids: Modeling anisotropic surface stresses
• Capillary-driven indentation of a microparticle into a soft, oil-coated substrate
• Radial dynamics of an encapsulated microbubble with interface energy
• Droplets capped with an elastic film can be round, elliptical, or nearly square
• Finite-temperature surface elasticity of crystalline solids
• Gradient Induced Droplet Motion Over Soft Solids
• Modulation of Semiconductor Superlattice Thermopower Through Symmetry and Strain
• Rethinking battery degradation in presence of surface effects: mechanical versus electrochemical peformance mediated by charging condition