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Water-Repellent Stability of Superhydrophobic Materials under Hydrostatic Pressure

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Abstract:

Keeping the water-repellent stability of superhydrophobic surface is necessary in application. Based on the total reflection of Cassie interface and vacuum technique, the superhydrophobic stability of the lotus leaf and an artificial material was investigated. The results show that during the Cassie-Wenzel transition, primary wetting transition occurs at a certain pressure that in accordance with theoretical prediction. However, when the air film is entrapped between microstructures, stability of water-repellency was greatly enhanced, and part of the wetting transition can be recovered when the pressure was released. Due to the micro-and nanoscale hierarchical structures, the lotus leaf shows better water-repellent stability and dewetting property than the artificial superhydrophobic surface when the hydrostatic pressure was applied and released.

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Periodical:

Applied Mechanics and Materials (Volumes 633-634)

Pages:

764-768

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.633-634.764

Citation:

Cite this paper

Online since:

September 2014

Authors:

Jian Ye Huang*, Feng Hui Wang

Keywords:

Hierarchical Structures, Stability, Superhydrophobicity, Wetting

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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