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Fabrication of titanium-based microstructured surfaces and study on their superhydrophobic stability

Published online by Cambridge University Press:  31 January 2011

Baojia Li ,
Ming Zhou ,
Run Yuan  and
Lan Cai
Baojia Li
Affiliation:
Center for Photon Manufacturing Science and Technology, Jiangsu University, Zhenjiang, Jiangsu, China 212013
Ming Zhou*
Affiliation:
Center for Photon Manufacturing Science and Technology, Jiangsu University, Zhenjiang, Jiangsu, China 212013
Run Yuan
Affiliation:
Center for Photon Manufacturing Science and Technology, Jiangsu University, Zhenjiang, Jiangsu, China 212013
Lan Cai
Affiliation:
Center for Photon Manufacturing Science and Technology, Jiangsu University, Zhenjiang, Jiangsu, China 212013
*
a)Address all correspondence to this author. e-mail: [email protected] or [email protected]
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Abstract

Based on the classical wetting theories, two theoretically predicted formulas of the apparent contact angles on square-pillar-array microstructured surfaces for Wenzel mode and Cassie mode have been derived, respectively. The theories of superhydrophobic stability on microstructured surfaces have been summarized. Four square-pillar-array samples were fabricated on titanium substrates by using the femtosecond laser micromachining technology, and wettability was analyzed by both experimental and analytical methods. The results showed that the titanium-based surfaces are superhydrophobic. The maximal apparent contact angle is up to 156.9°, while the corresponding sliding angle is 4.7°. Testing of the superhydrophobic stability of the surfaces showed that the maximal deviation of the apparent contact angles is only 0.6°. Analyses indicate that the stable superhydrophobicity of the supplied titanium-based surfaces is within a certain range and not perfect. To improve that, a practical controllable method is proposed herein for the design of a stable superhydrophobic surface.

Keywords

LaserMicrostructureTi
Type
Articles
Information
Journal of Materials Research , Volume 23 , Issue 9 , September 2008 , pp. 2491 - 2499
Copyright
Copyright © Materials Research Society 2008

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