Study of Preparation and Dynamic Hydrophobicity of Superhydrophobic Surfaces With Micro-Nano Textures

ZHANG Jing-xian; YAO Zhao-hui; HAO Peng-fei; FU Cheng-song; NAN Dou; WEI Jin-quan

doi:10.3879/j.issn.1000-0887.2014.03.011

Volume 35 Issue 3

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ZHANG Jing-xian, YAO Zhao-hui, HAO Peng-fei, FU Cheng-song, NAN Dou, WEI Jin-quan. Study of Preparation and Dynamic Hydrophobicity of Superhydrophobic Surfaces With Micro-Nano Textures[J]. Applied Mathematics and Mechanics, 2014, 35(3): 322-330. doi: 10.3879/j.issn.1000-0887.2014.03.011

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Study of Preparation and Dynamic Hydrophobicity of Superhydrophobic Surfaces With Micro-Nano Textures

doi: 10.3879/j.issn.1000-0887.2014.03.011

¹School of Aerospace, Tsinghua University, Beijing 100084, P.R.China;²School of Materials Science and Engineering, Tsinghua University,Beijing 100084, P.R.China

Funds: The National Natural Science Foundation of China（11272176）

Received Date: 2013-10-06
Rev Recd Date: 2013-12-13
Publish Date: 2014-03-15

Abstract

Abstract

A kind of superhydrophobic surface with controlled two-scale micro-nano textures was prepared. The lithography and ion etching technology were used to fabricate the micro structures on silicon wafers. Then the carbon nanotubes were controlled to grow on the prepared substrate by means of chemical vapor deposition (CVD) technology. The morphology and performance of the different surfaces have been examined by scanning electron microscope (SEM) and contact angle, rolling angle measurement. Particle image velocimetry (PIV) technology was used to capture the internal velocity distribution of water droplets rolling on the superhydrophobic surfaces with two-scale micro-nano textures. Compared with the one-scale micro-structured surface, the two-scale micro-nano-textured surfaces were found with lower rolling angle and higher rolling velocity for the droplets on them. A much higher slip velocity was found near the wall in the two-scale case, too, which may lead to significant drag reduction in the future research.
- superhydrophobic,
- micro-nano textures,
- PIV(particle image velocimetry),
- drag reduction

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References(9)

References

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