干旱区生态环境知识资源中心(Arid): Enhanced Compliant Adhesive Design and Fabrication with Dual-Level Hierarchical Structure

Arid

DOI	10.1016/S1672-6529(10)60245-4
	Enhanced Compliant Adhesive Design and Fabrication with Dual-Level Hierarchical Structure
	Li Yasong; Dan Sameoto; Carlo Menon
来源期刊	Journal of Bionics Engineering
ISSN	1672-6529
出版年	2010
卷号	7 期号:3 页码:228-234
英文摘要	Synthetic dry adhesives inspired by the nano- and micro-scale hairs found on the feet of geckos and some spiders have been developed for almost a decade. Elastomeric single level micro-scale mushroom shaped fibres are currently able to function even better than natural dry adhesives on smooth surfaces under normal loading. However, the adhesion of these single level synthetic dry adhesives on rough surfaces is still not optimal because of the reduced contact surface area. In nature, contact area is maximized by hierarchically structuring different scales of fibres capable of conforming surface roughness. In this paper, we adapt the nature's solution arid propose a novel dual-level hierarchical adhesive design using Polydimethylsiloxane (PDMS), which is tested under peel loading at different orientations. A negative macro-scale mold is manufactured by using a laser cutter to define holes in a Poly(methyl methacrylate) (PMMA) plate. After casting PDMS macro-scale fibres by using the obtained PMMA mold, a previously prepared micro-fibre adhesive is bonded to the macro-scale fibre substrate. Once the bonding polymer is cured, the micro-fibre adhesive is cut to form macro scale mushroom caps. Each macro-fibre of the resulting hierarchical adhesive is able to conform to loads applied in different directions. The dual-level structure enhances the peel strength on smooth surfaces compared to a single-level dry adhesive, but also weakens the shear strength of the adhesive for a given area in contact. The adhesive appears to be very performance sensitive to the specific size of the fibre tips, and experiments indicate that designing hierarchical structures is not as simple as placing multiple scales of fibres on top of one another, but can require significant design optimization to enhance the contact mechanics and adhesion strength
英文关键词	biomimetics dry adhesive hierarchical dual-level adhesive silicone polymer
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Energy & Fuels
CSCD记录号	CSCD:4077390
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335079
作者单位	Li Yasong, MENRVA Lab, School of Engineering Science, Simon Fraser University, Burnaby, V5A 1S6, Canada.; Carlo Menon, MENRVA Lab, School of Engineering Science, Simon Fraser University, Burnaby, V5A 1S6, Canada.; Dan Sameoto, Department of Mechanical Engineering, University of Alberta, AB, T6G 2G8, Canada.
推荐引用方式 GB/T 7714	Li Yasong,Dan Sameoto,Carlo Menon. Enhanced Compliant Adhesive Design and Fabrication with Dual-Level Hierarchical Structure[J],2010,7(3):228-234.
APA	Li Yasong,Dan Sameoto,&Carlo Menon.(2010).Enhanced Compliant Adhesive Design and Fabrication with Dual-Level Hierarchical Structure.Journal of Bionics Engineering,7(3),228-234.
MLA	Li Yasong,et al."Enhanced Compliant Adhesive Design and Fabrication with Dual-Level Hierarchical Structure".Journal of Bionics Engineering 7.3(2010):228-234.