와이어 방전가공을 이용한 상어 표피 모사 리블렛 표면 제작
Fabrication of a Micro-riblet Shark Skin-like Surface using a WEDM Process
0
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
In this study, we attempt to produce a semi-elliptical riblet with a shark skin-like surface using wire electrical discharge machining (WEDM) and micro molding techniques. Our design for the production of the semi-elliptical mold includes an electrode, a winding roller, and a guide on the WEDM system. A replication mold with negative riblets is machined using WEDM, and a shark skin inspired surface with positive riblets is fabricated using a micro molding technique. For a comparison with the original shark skin, a shark skin replica is also produced using the micro molding technique directly from a shark skin template. Droplet contact angles on a flat surface, the shark skin replica, and the epoxy resin-based micro riblet shark skin-like surface are evaluated. The effect of a Teflon coating on the contact angles for the three different surfaces is also investigated. The results show the micro riblet with a shark skin-like surface has a similar contact angle as the shark skin replica, which means that the simplified riblet shark skin surface strongly influences the performance of wettability. This study confirms the effectiveness of using the WEDM method to prepare hydrophobic surfaces with diverse surface patterns.
Abstract
In this study, we attempt to produce a semi-elliptical riblet with a shark skin-like surface using wire electrical discharge machining (WEDM) and micro molding techniques. Our design for the production of the semi-elliptical mold includes an electrode, a winding roller, and a guide on the WEDM system. A replication mold with negative riblets is machined using WEDM, and a shark skin inspired surface with positive riblets is fabricated using a micro molding technique. For a comparison with the original shark skin, a shark skin replica is also produced using the micro molding technique directly from a shark skin template. Droplet contact angles on a flat surface, the shark skin replica, and the epoxy resin-based micro riblet shark skin-like surface are evaluated. The effect of a Teflon coating on the contact angles for the three different surfaces is also investigated. The results show the micro riblet with a shark skin-like surface has a similar contact angle as the shark skin replica, which means that the simplified riblet shark skin surface strongly influences the performance of wettability. This study confirms the effectiveness of using the WEDM method to prepare hydrophobic surfaces with diverse surface patterns.
참고문헌 (14)
- Barthlott, W., "Purity of the sacred lotus, or escape from contamination in biological surfaces", Planta, 202, pp.1~8 (1997)
- Bixler, G. D., "Fluid drag reduction and efficient self-cleaning with rice leaf and butterfly wing bioinspired surfaces", Nanoscale, 5, pp.7685~7710 (2013)
- Zheng, Y., "Directional Adhesion of Superhydrophobic Butterfly Wings", Soft Matter, 3, pp.178~182 (2007)
- Feng, L., "Super-hydrophobic surfaces from natural to artificial", Adv. Mater, 14, pp.1857~1860 (2002)
- Genzer, J., "Biological and synthetic self cleaning surfaces", MRS Bulletin, 33, pp.742~746 (2008)
- Sirovich, L., "Turbulent drag reduction by passive mechanisms", Nature, 388, pp.753~755 (1997)
- Lee, S. M., "The effect of the surface wettability of nanoprotrusions formed on network-type microstructures", J. Micromech. Mocroeng, 18, pp.125007~ (2008)
- Jeong, H. E., "Nanoengineered multiscale hierarchical structures with tailored wetting properties", Langmuir, 22, pp.1640~1645 (2006)
- Park, C. I., "Wetting transition and optimal design for microstructured surfaces with hydrophobic and hydrophilic materials", J. Colloid. Interf. Sci, 336, pp.298~303 (2009)
- Rahmawan, Y., "Wrinkled, Dual-Scale Structures of Diamond-Like Carbon(DLC)for Superhydrophobicity", Langmuir, 26, pp.484~491 (2010)
- 공유식, "상어 표피 모사 리블렛 구조의 젖음성 평가", 한국윤활학회지, 29(5), pp.304~309 (2013), 한국윤활학회[DOI]
- Kim, T. W., "Assessment of hydro", oleophobicity for shark skin replica with riblets, 2014, pp.14, 1~7
- 김영훈, "방전가공면을 복제한 실리콘수지 표면의 발수특성연구", 소성가공, 22(1), pp.23~29 (2013), 한국소성가공학회
- Bae, W. G., "One-Step Process for Superhydrophobic Metallic Surfaces by electrical discharge machining", ACS Appl. Mater. and Interfaces, 4, pp.3685~3691 (2012)