Capillary forces between soft, elastic spheres

Butt, H.-J., Barnes, W.J.P., del Campo, A., Kappl, M. and Schönfeld, F. (2010) Capillary forces between soft, elastic spheres. Soft Matter, 6(23), pp. 5930-5936. (doi:10.1039/C0SM00455C)

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Abstract

The adhesive capillary force between two elastic spheres or a sphere and a plane is usually described by Fadh = 4πR*, where γ is the surface tension of the liquid and R* is the effective radius of the sphere(s). With approximate analytical calculations we show that for soft materials and radii larger than 5r3E2/γ2 (r: radius of curvature of the liquid and E: Young's modulus) the capillary force increases more steeply and scales with R*2. This result is confirmed by finite element simulations. It may be relevant for an understanding of bioadhesion of insects and tree frogs and for an understanding of film formation from dispersions of soft particl

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Barnes, Dr W.Jon.P
Authors: Butt, H.-J., Barnes, W.J.P., del Campo, A., Kappl, M., and Schönfeld, F.
College/School:College of Medical Veterinary and Life Sciences > School of Life Sciences
Journal Name:Soft Matter
ISSN:1744-683X
Published Online:20 September 2010

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