| Issue |
Europhys. Lett.
Volume 56, Number 3, November 2001
|
|
|---|---|---|
| Page(s) | 414 - 419 | |
| Section | Condensed matter: structure, mechanical and thermal properties | |
| DOI | https://doi.org/10.1209/epl/i2001-00534-y | |
| Published online | 01 December 2003 | |
Dewetting on porous media
Laboratoire Physico-Chimie Curie, Unité Mixte de Recherche 168
Centre National de la Recherche Scientifique/Institut Curie
26 rue d'Ulm, 75248 Paris CEDEX 05, France
Received:
12
April
2001
Accepted:
10
August
2001
Removal of a liquid on porous substrates involves two mechanisms:
suction and dewetting. 1) We study first the dewetting with
no suction of a liquid film deposited on a porous membrane. We report
the first observation of a finite receding angle on a
saturated porous surface. Below a critical receding thickness
, the film dewets by nucleation and growth of a dry patch.
2) To allow for both mechanisms, we study the aspiration of a
hole in the liquid film pumped with a constant current J. Two
growth regimes are observed and interpreted:
i) a "suction" regime at high J and ii) a dewetting
regime at low J.
PACS: 68.08.Bc – Wetting / 47.55.Mh – Flows through porous media
© EDP Sciences, 2001
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