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Issue 27, 2013
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Elasto-capillary meniscus: pulling out a soft strip sticking to a liquid surface

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Abstract

A liquid surface touching a solid usually deforms in a near-wall meniscus region. In this work, we replace part of the free surface with a soft polymer and examine the shape of this ‘elasto-capillary meniscus’, a result of the interplay between elasticity, capillarity and hydrostatic pressure. We focus particularly on the extraction threshold for the soft object. Indeed, we demonstrate both experimentally and theoretically the existence of a limit height of liquid tenable before breakdown of the compound and extraction of the object. Such an extraction force is known since Laplace and Gay-Lussac, but only in the context of rigid floating objects. We revisit this classical problem by adding the elastic ingredient and predict the extraction force in terms of the strip elastic properties. It is finally shown that the critical force can be increased with elasticity, as is commonplace in adhesion phenomena.

Graphical abstract: Elasto-capillary meniscus: pulling out a soft strip sticking to a liquid surface

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Article information


Submitted
23 Jan 2013
Accepted
11 Apr 2013
First published
21 May 2013

Soft Matter, 2013,9, 6226-6234
Article type
Paper

Elasto-capillary meniscus: pulling out a soft strip sticking to a liquid surface

M. Rivetti and A. Antkowiak, Soft Matter, 2013, 9, 6226
DOI: 10.1039/C3SM50251A

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