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Effects of Metal Coatings on Adhesive Characteristics of Gecko-like Micro Structures

도마뱀 인공섬모 구조물의 접착 특성에 금속코팅이 미치는 영향

  • Kim, Gyu Hye (Dept. of Mechanical Design Engineering, Andong Nat'l Univ.) ;
  • An, Tea Chang (Dept. of Mechanical Design Engineering, Andong Nat'l Univ.) ;
  • Hwang, Hui Yun (Dept. of Mechanical Design Engineering, Andong Nat'l Univ.)
  • 김규혜 (국립안동대학교 기계설계공학과) ;
  • 안태창 (국립안동대학교 기계설계공학과) ;
  • 황희윤 (국립안동대학교 기계설계공학과)
  • Received : 2015.02.13
  • Accepted : 2015.06.07
  • Published : 2015.11.01

Abstract

Recently, there have been several studies on the inspiration and application of optimized natural structures. One study introduced a new adhesion method that was inspired by the feet of geckos because of their superior features such as high adhesion strength, ease-of-removal, and they are environmentally friendly. Various micro- or nano-structures were fabricated and tested for gecko-like dry adhesives, but gecko-like dry adhesives that were developed became easily worn from frequent use. In this study, we propose a metal-coating method to improve the durability of gecko-like dry adhesives. We evaluate the initial adhesion strength and durability by performing repeated adhesion tests on a glass plate. The initial adhesive strength of gold-coated micro-structures was 60% of that for non-coated ones. However, the adhesive strength of gold-coated micro-structures was kept as 58% of their initial adhesion strength, while that of non-coated ones was only 40%.

자연계에 존재하는 다양한 생명체 중 몇몇은 벽이나 천장을 자유자재로 걸어다닌다. 이러한 생명체 중 대표적으로 Gecko는 발가락 표피에 수십억개의 주걱모양의 나노헤어를 가지고 있으며, 이러한 구조로 인하여 높은 접착력을 가진다. 본 연구에서는, 도마뱀 발바닥 섬모와 같은 미세 마이크로 구조물에 금속코팅을 하여 접착특성을 향상시키는 것을 제안한다. 도마뱀 모방 인공섬모 구조물을 DRIE공법으로 준비된 몰드를 이용하여 PDMS로 제조하였다. 그리고, 인공섬모의 금속 코팅은 플라즈마 스퍼터링을 사용하여 수행하였다. 접착력과 내구성은 실험을 유리에 반복 접착 실험으로 평가 하였다. 접착성 및 내구성 실험을 통하여 인공섬모 구조물에 금속코팅이 미치는 영향에 대해 관찰하였다.

Keywords

References

  1. Moon, M.-W., Cha, T.-G., Lee, K.-R., Vaziri, A. and Kim, H.-Y., 2009, "Adhesion and Friction Behaviors of the Angled Micro-pillars"The Korean Society of Mechanical Engineers,Vol. 2009, No. 5, pp. 268-269.
  2. Cho, Y.-S., Jung, D.-H., Han, H. and Kim, W.-D., 2007, "Fabrication of a Novel Dry Adhesive Structure with Reduced Effective Stiffness." The Korean Society of Mechanical Engineers, Vol. 2007, No. 5, pp. 1900-1904.

Cited by

  1. Durability Improvement of Synthetic Dry Adhesives by Metal Coatings vol.2017, pp.1687-8442, 2017, https://doi.org/10.1155/2017/1696038