Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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Wettability of Biomimetic Riblet Surface like Sharkskin

상어 표피 모사 리블렛 구조의 젖음성 평가

  • Kong, Yu Sik (A+LINC, Pukyong National University) ;
  • Kim, Tae Wan (Department of Mechanical Engineering, Pukyong National University)
  • 공유식 (부경대학교 A+LINC 사업단) ;
  • 김태완 (부경대학교 기계공학과)
  • Received : 2013.05.17
  • Accepted : 2013.07.15
  • Published : 2013.10.31
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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

References

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