Superior lubrication properties of biomimetic surfaces with hierarchical structure

Superior lubrication properties of biomimetic surfaces with hierarchical structure In this study, a new method to fabricate biomimetic engineering surfaces with lotus leaf-like hierarchical microstructures is explored. Contact angle tests were performed to study the influences of the structures on the surface hydrophobic properties. Air lubrication resulted in hydrophobicity and consequently reduced the liquid-solid contact. The superior lubrication behaviour of a biomimetic hierarchical surface was observed by tribology experiments. Simulation results indicated that by improving hydrophobicity, the frictional drag was reduced by a significant amount because of the large fraction of air. It was found that introducing the superposition of microscale hemispherical papillae and branch-like nanostructures has a dramatic positive effect in reducing frictional drag results because 99% of liquid-solid interface was replaced by air-liquid interface. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Tribology International Elsevier

Superior lubrication properties of biomimetic surfaces with hierarchical structure

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Publisher
Elsevier
Copyright
Copyright © 2017 Elsevier Ltd
ISSN
0301-679X
eISSN
1879-2464
D.O.I.
10.1016/j.triboint.2017.10.021
Publisher site
See Article on Publisher Site

Abstract

In this study, a new method to fabricate biomimetic engineering surfaces with lotus leaf-like hierarchical microstructures is explored. Contact angle tests were performed to study the influences of the structures on the surface hydrophobic properties. Air lubrication resulted in hydrophobicity and consequently reduced the liquid-solid contact. The superior lubrication behaviour of a biomimetic hierarchical surface was observed by tribology experiments. Simulation results indicated that by improving hydrophobicity, the frictional drag was reduced by a significant amount because of the large fraction of air. It was found that introducing the superposition of microscale hemispherical papillae and branch-like nanostructures has a dramatic positive effect in reducing frictional drag results because 99% of liquid-solid interface was replaced by air-liquid interface.

Journal

Tribology InternationalElsevier

Published: Mar 1, 2018

References

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