한국정밀공학회지 (Journal of the Korean Society for Precision Engineering)

  • 제32권6호
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  • Pages.577-585
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  • 2015
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  • 1225-9071(pISSN)
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  • 2287-8769(eISSN)
한국정밀공학회 (Korean Society for Precision Engineering)
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마이크로 표면주름 구조에 따른 물방울 동적거동에 관한 실험적 연구

Experimental Study of Dynamic Behavior of a Water Droplet on Diverse Wrinkling Surfaces

  • 백대현 (부산대학교 기계공학부 대학원) ;
  • ;
  • 박상후 (부산대학교 기계공학부 / 정밀정형 및 금형가공연구소)
  • Baek, Dae Hyeon (Graduate School of Mechanical Engineering, Pusan National University) ;
  • Zhao, Zhijun (Graduate School of Mechanical Engineering, Pusan National University) ;
  • Park, Sang-Hu (School of Mechanical Engineering, ERC/NSDM, Pusan National University)
  • 투고 : 2015.03.05
  • 심사 : 2015.05.19
  • 발행 : 2015.06.01
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초록

We fabricated multi-scale such as macro-, micro-, and multi-scale wrinkles by using repetitive volume dividing (RVD) method and thermal curing process. Also wrinkle surface was modified with coating of a self-assembled monolayer (SAM). We measured the contact angle of each wrinkled surface, and observed the behavior of droplets on sloping surface. Through experimental study, we found out that the contact angle was much higher in case of multi-scale and SAM coated wrinkles. And micro-scale wrinkle showed a high contact angle comparing with that of macro-scale wrinkle. Dynamic behaviors of a water droplet like sliding velocity on diverse wrinkled surfaces were dependent on their static contact angles. These results showed that hydro-dynamic characteristics were changed depending on the wrinkle structure and the material forming the wrinkle. These dynamic characteristics can be utilized in bio-chip, microfluidics, and many others in order to control easily chemical reactivity.

키워드

참고문헌

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피인용 문헌

  1. Metallization of microscale wrinkles on a curved surface by contact and electro-replication method vol.92, pp.1-4, 2017, https://doi.org/10.1007/s00170-017-0217-1