Relationship between sliding acceleration of water droplets and dynamic contact angles on hydrophobic surfaces

This study measured sliding acceleration of water droplets on hydrophobic solid surfaces and used expanding and contracting method to compare that value with dynamic contact angles. Sliding action of the droplet was classified into three motion categories: constant accelerated motion, constant veloc...

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Bibliographic Details
Published in:Surface science 2006-08, Vol.600 (16), p.L204-L208
Main Authors: Sakai, Munetoshi, Song, Jeong-Hwan, Yoshida, Naoya, Suzuki, Shunsuke, Kameshima, Yoshikazu, Nakajima, Akira
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Contact angle
Contact angle hysteresis
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Hydrophobicity
Physics
Sliding acceleration
Sliding angle
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Summary:This study measured sliding acceleration of water droplets on hydrophobic solid surfaces and used expanding and contracting method to compare that value with dynamic contact angles. Sliding action of the droplet was classified into three motion categories: constant accelerated motion, constant velocity and stasis. Differences exist in the dependencies of contact radius and the injection–suction rate in dynamic contact angle hysteresis according to these categories. This method is an effective indicator of water droplets’ sliding acceleration.
ISSN:0039-6028
1879-2758
DOI:10.1016/j.susc.2006.06.039