Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
권호 표지
DOI QR코드

DOI QR Code

Rapid Fabrication of Micro-nano Structured Thin Film for Water Droplet Separation using 355nm UV Laser Ablation

355 nm UV 레이저 어블레이션을 이용한 마이크로-나노 구조의 액적 분리용 박막 필터 쾌속 제작

  • Shin, Bo-Sung (ERC/NSDM, Department of Mechanical Engineering, Pusan Natl. Univ.)
  • 신보성 (부산대학교 정밀정형 및 금형가공 연구소)
  • Received : 2012.01.11
  • Accepted : 2012.04.07
  • Published : 2012.07.01
Download PDF
⟨ Previous Next ⟩

Abstract

Recently micro-nano structures has widely been reported to improve the performance of waterproof, heat isolation, sound and light absorption in various fields of electric devices such as mobiles, battery, display and solar panels. A lot of micro-sized holes on the surface of thin film provide excellent sound, or heat, or light transmission efficiency more than solid film and simultaneously nano-sized protrusions around micro hole increase the hydrophobicity of the surface of thin film because of lotus leaf effects as generally known previously. In this paper new rapid fabrication process with 355 nm UV laser ablation was proposed to get micro-nano structures on the surface of thin film, which have only been observed at higher laser fluence. Developed thin micro-nano structured film was also investigated the hydrophobic property by measuring the contact angle and demonstrated the possibility to apply to water droplet separation.

Keywords

References

  1. Yan, Y. Y., Gao, N., and Barthlott, W., "Mimicking natural superhydrophobic surfaces and grasping the wetting process: A review on recent progress in preparing superhydrophobic surfaces," Advances in Colloid and Interface Science, Vol. 169, No. 2, pp. 80-105, 2011. https://doi.org/10.1016/j.cis.2011.08.005
  2. Lee S. M. and Kwon T. H., "Effects of intrinsic hydrophobicity on wettability of polymer replicas of a superhydrophobic lotus leaf," J Micromech Microeng, Vol. 17, No. 4, pp. 687-692, 2007. https://doi.org/10.1088/0960-1317/17/4/003
  3. Cho W. K. and Choi I. S., "Fabrication of hairy polymeric films inspired by geckos: wetting and high adhesion properties," Adv. Funct. Mater., Vol. 18, No. 7, pp. 1089-1096, 2008. https://doi.org/10.1002/adfm.200701454
  4. Kwon, Y., Patankar, N., Choi, J., and Lee, J., "Design of surface hierarchy for extreme hydrophobicity," Langmuir, Vol. 25, No. 11, pp. 6129-6136, 2009. https://doi.org/10.1021/la803249t
  5. Tunna, L., Kearns, A., O'Neill, W., and Sutcli, C. J., "Micromachining of copper using Nd :YAG laser radiation at 1064, 532, and 355 nm wavelengths," Optics & Laser Technology, Vol. 33, No. 3, pp. 135- 143, 2001. https://doi.org/10.1016/S0030-3992(00)00126-2
  6. http://dada.cca.edu/-nkurita/bio_actual_web/gallery.html
  7. http://www.visualphotos.com
  8. Oh, J. Y. and Shin, B. S., "Photothermal and Photochemical Investigation on Laser Ablation of the Polyimide by 355nm UV Laser Processing," Journal of the Korean Society for Precision Engineering, Vol. 24, No. 4, pp. 147-152, 2007.
  9. Oh, J. Y. and Shin, B. S., "A Study on Laser Ablation of Copper Thin Foil by 355nm UV Laser Processing," Journal of the Korean Society for Precision Engineering, Vol. 24, No. 2, pp. 134-139, 2007.