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http://dx.doi.org/10.9725/kstle.2013.29.5.304

Wettability of Biomimetic Riblet Surface like Sharkskin  

Kong, Yu Sik (A+LINC, Pukyong National University)
Kim, Tae Wan (Department of Mechanical Engineering, Pukyong National University)
Publication Information
Tribology and Lubricants / v.29, no.5, 2013 , pp. 304-309 More about this Journal
Abstract
Shark skin has functionalities such as self-cleaning and antifouling; it also exhibits excellent drag reduction owing to a hierarchical structure of microgrooves and nanometer-long chain mucus drag reduction interfaces around the shark body. In this study, the wettability of a shark skin surface and its replicas are evaluated. First, a shark skin template is taken from a real shark. Then, shark skin replicas are produced directly from a shark skin template, using a micromolding technique. The quantitative replication precision of the shark skin replicas is evaluated by comparing the geometry of the shark skin template to the replica using 2D surface profiles. Contact angles at the solid-air-water interfaces are evaluated for the shark skin template and its replicas under two conditions: with and without hydrophobic coating. The results show that the microriblets on shark skin improve the hydrophobic feature and play a critical role in self-cleaning.
Keywords
shark skin; riblet; wettability;
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Times Cited By KSCI : 1  (Citation Analysis)
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