Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 317, Issue 1-3, Pages 592-597Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2007.11.048
Keywords
wetting; pinning effect; super water-repellency; contact angle; Wenzel equation; Cassie/Baxter equation
Categories
Ask authors/readers for more resources
We have first found that the pinning effect of wetting plays an important role as the 4th mechanism for the super water-repellent surfaces in some cases, particularly in the surfaces consisting of pillar structures. In such cases the Plot Of COS theta(R) (theta(R): contact angle of a liquid on a rough surface) versus cos theta (theta: that on the flat surface) deviates remarkably from the expected curves of the Wenzel and the Cassie/Baxter theories, and one can judge the dominance of pinning effect in the super water-repellency from this plot. In addition the super water-repellent surfaces resulting from the pinning effect is not in the thermodynamically equilibrium state, but in the metastable one when the contact angle on the flat surface is smaller than 90 degrees. (c) 2007 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available