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Dewetting of a water film between a solid and a rubber

F Brochard-Wyart and P G de Gennes

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A water film (thickness e) between two hydrophobic solids is metastable. If contact is established (over an initial disc of radius R(0)>R*, where R* is a certain nucleation size), the dry path expands (up to a size R(t) at time t), and the rejected water forms a rim (of width l(t)) around the patch. We predict R(t) approximately t34 / and l(t) approximately t12 /. Typically, over 5*10-3 s we expect R(t) approximately 1.6 mm.


PACS

68.08.Bc Wetting

68.35.Np Adhesion

68.35.Md Surface thermodynamics, surface energies

Subjects

Soft matter, liquids and polymers

Surfaces, interfaces and thin films

Dates

Issue 23A (6 June 1994)



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