한국가시화정보학회지 (Journal of the Korean Society of Visualization)

  • 제16권3호
  • /
  • Pages.35-39
  • /
  • 2018
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  • 1598-8430(pISSN)
  • /
  • 2093-808X(eISSN)
한국가시화정보학회 (The Korean Society of Visualization)
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친수성 마이크로 기둥 구조 표면에서의 표면 지형적 특성에 따른 퍼짐성 현상에 대한 실험적 연구

Experimental study of spreading phenomena on hydrophilic micro-textured surfaces depending on surface geometrical features

  • Jang, Munyoung (Department of Mechanical Design Engineering, Pukyong National University) ;
  • Park, Sehyeon (Department of Mechanical Design Engineering, Pukyong National University) ;
  • Yu, Dong In (Department of Mechanical Design Engineering, Pukyong National University)
  • 투고 : 2018.12.03
  • 심사 : 2018.12.27
  • 발행 : 2018.12.31
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초록

In multiphase systems, surface wettability is one of dominant design parameters to enhance system performance. Since surface wettability can be maximized and minimized with micro-textured surfaces, therefore micro-textured surfaces are widely countered in various research and engineering fields. In this study, for better understanding of micrometer scaled surface wettability, spreading phenomena is experimentally investigated on the hydrophilic micro-textured surfaces. By photolithography and conventional dry etching method, there are prepared the surfaces with uniformly arrayed micro-pillars. The interfacial motions of a water droplet on the test sections are visualized by high speed camera in top view. On the basis of visualization data, it is analyzed the relation between dynamic coefficient and geometrical features on micro-textured surfaces.

키워드

GSSGB0_2018_v16n3_35_f0001.png 이미지

Fig. 1. Test sections (a) MEMS recipe, (b) 3D-profiler image (d20g20 case)

GSSGB0_2018_v16n3_35_f0002.png 이미지

Fig. 2. Visualization of spreading phenomena (d4g4 case)

GSSGB0_2018_v16n3_35_f0003.png 이미지

Fig. 3. Comparison of precursor radius in various geometrical conditions (total regimes)

GSSGB0_2018_v16n3_35_f0004.png 이미지

Fig. 4. Comparison of precursor radius in various geometrical conditions (2nd regime)

GSSGB0_2018_v16n3_35_f0005.png 이미지

Fig. 5. Dynamic coefficient (D) depending on roughness ratio (fW)

Table 1. Specific geometrical features of test sections

GSSGB0_2018_v16n3_35_t0001.png 이미지

참고문헌

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