Issue 9, 2012

Anisotropic liquid penetration arising from a cross-sectional wettability gradient

Abstract

Using a simple membrane model composed of spaced microcylinders, we show unambiguously that a wettability gradient along the thickness direction can cause anisotropic liquid penetration behavior, which is attributed to the coupled effects of local geometrical angle and contact angle on the critical breakthrough pressure. The anisotropic ratio of critical breakthrough pressure can be improved by reducing the spacing ratio of the cylinder membrane as well as by increasing the wettability gradient. This kind of gradient membrane with anisotropic penetration resistance to liquid may open up new applications in fluid control, membrane separation and advanced fabrics.

Graphical abstract: Anisotropic liquid penetration arising from a cross-sectional wettability gradient

Supplementary files

Article information

Article type
Paper
Submitted
05 Nov 2011
Accepted
19 Dec 2011
First published
20 Jan 2012

Soft Matter, 2012,8, 2633-2637

Anisotropic liquid penetration arising from a cross-sectional wettability gradient

X. Tian, J. Li and X. Wang, Soft Matter, 2012, 8, 2633 DOI: 10.1039/C2SM07111H

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