Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Apparent Contact Angle on the Hydrophilic/Hydrophobic Surfaces with Micro-pillars

마이크로 기둥 구조가 있는 친수성/소수성 표면에서의 겉보기 접촉 각에 대한 연구

  • Yu, Dong In (Department of Mechanical Engineering, POSTECH) ;
  • Doh, Seung Woo (Division of Advanced Nuclear Engineering, POSTECH) ;
  • Kwak, Ho Jae (Department of Mechanical Engineering, POSTECH) ;
  • Ahn, Ho Seon (Division of Mechanical System Engineering, Incheon National University) ;
  • Kim, Moo Hwan (Division of Advanced Nuclear Engineering, POSTECH) ;
  • Park, Hyun Sun (Division of Advanced Nuclear Engineering, POSTECH)
  • 유동인 (포항공과대학교 기계공학과) ;
  • 도승우 (포항공과대학교 첨단원자력공학부) ;
  • 곽호재 (포항공과대학교 기계공학과) ;
  • 안호선 (인천대학교 기계시스템공학부) ;
  • 김무환 (포항공과대학교 첨단원자력공학부) ;
  • 박현선 (포항공과대학교 첨단원자력공학부)
  • Received : 2013.12.09
  • Accepted : 2014.01.12
  • Published : 2014.02.01
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Abstract

In this study, the apparent contact angle on the hydrophilic/hydrophobic surfaces with micropillars was studied. The previous researches showed that the Wenzel equation and the Cassie-Baxter equation were thermodynamically derived for the rough hydrophilic/hydrophobic surfaces and generally referenced on the field of wetting phenomena. For the verification of both equations, the apparent contact angle on the hydrophilic/hydrophobic surfaces with micro-pillars was measured. In the comparison between the measured and estimated apparent contact angles with the equations, the differences between the apparent contact angles were analyzed. Conclusively, the available range and limitation of theoretical equations were investigated and further researches about the apparent contact angle on the rough surfaces were proposed.

Keywords

References

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