Issue 28, 2014

Coupling of elasticity to capillarity in soft aerated materials

Abstract

We study the elastic properties of soft solids containing air bubbles. Contrary to standard porous materials, the softness of the matrix allows for a coupling of the matrix elasticity to surface tension forces acting on the bubble surface. Thanks to appropriate experiments on model systems, we demonstrate how the elastic response of the soft porous solid is governed by two dimensionless parameters: the gas volume fraction and a capillary number comparing the elasticity of the matrix with the stiffness of the bubbles. Furthermore, we show that our experimental results are accurately predicted by computations of the shear modulus through a micro-mechanical approach.

Graphical abstract: Coupling of elasticity to capillarity in soft aerated materials

Article information

Article type
Paper
Submitted
24 Jan 2014
Accepted
28 Apr 2014
First published
29 Apr 2014

Soft Matter, 2014,10, 5093-5098

Coupling of elasticity to capillarity in soft aerated materials

L. Ducloué, O. Pitois, J. Goyon, X. Chateau and G. Ovarlez, Soft Matter, 2014, 10, 5093 DOI: 10.1039/C4SM00200H

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