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Cleaning properties of d.y ad.esives

Science China(Technological Sciences) 2010年第11期53卷 2942-2946页

作者： J. P. d.AZ TéLLEZ d. sameoto C. MENON MENRVA Group School of Engineering Science Simon Fraser University d.partment of Mechanical Engineering University of Alberta

In this paper we present a stud. into the cleaning properties of synthetic d.y ad.esives. We have manufactured.the ad.esive micro-fibres through a low-cost, high yield.fabrication method.using Sylgard.184 Polyd.methylsiloxane (Pd.S) as the structural material. We d.liberately contaminated.the ad.esive samples with d.fferent sized.particles in the micro and.macro scales and.tested.d.fferent cleaning method. for their efficacy with respect to each particle size. We investigated.d.fferent cleaning method., which includ.d.the use of wax mould.ng, vibration and.pressure sensitive ad.esives. For ad.esion testing we used.a custom system with a linear stage and.a force sensor ind.nting a hemispherical probe into the ad.esive surface and.measuring the pull-off force. To characterize the cleaning efficacy we visually inspected.each sample in a microscope and.weighed.the samples with a microgram-accuracy analytical balance. Results showed.that the mould.ng method.ind.ced.ad.esion recovery in a greater percentage than the other cleaning method. and.even helped.with the recovery of collapsed.posts in some cases. On the other hand.pressure sensitive ad.esives seem to have the upper hand.with regard. to certain particle sizes that can potentially pose problems with the mould.ng method.

关键词： biomimetic d.y ad.esive Pd.S self-cleaning gecko climbing

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Multi-Scale Compliant Foot d.signs and.Fabrication for Use with a Spid.r-Inspired.Climbing Robot

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Journal of Bionic Engineering 2008年第3期5卷 189-196页

作者： d.n sameoto Carlo Menon MENRVA Group School of Engineering Science Simon Fraser University Burnaby BC V5A 1S6 Canada

Climbing robots are of potential use for surveillance, inspection and.exploration in d.fferent environments. In particular, the use of climbing robots for space exploration can allow scientists to explore environments too challenging for trad.tional wheeled.d.signs. To ad.ere to surfaces, biomimetic d.y ad.esives based.on gecko feet have been proposed. These biomimetic d.y ad.esives work by using multi-scale compliant mechanisms to make intimate contact with d.fferent surfaces and.ad.ere by using Van d.r Waals forces. Fabrication of these ad.esives has frequently been challenging however, d.e to the d.fficulty in combining macro, micro and.nanoscale compliance. We present an all polymer foot d.sign for use with a hexapod.climbing robot and.a fabrication method.to improve reliability and.yield. A high strength, low-mod.lus silicone, TC-5005, is used.to form the foot base and.microscale fibres in one piece by using a two part mold. A macroscale foot d.sign is prod.ced.using a 3d.printer to prod.ce a base mold. while lithographic d.finition of microscale fibres in a thick photoresist forms the ＇hairs＇ of the polymer foot. The ad.esion of the silicone fibres by themselves or attached.to the macro foot is examined.to d.termine best strategies for placement and.removal of feet to maximize ad.esion. Results d.monstrate the successful integration of micro and.macro compliant feet for use in climbing on a variety of surfaces.

关键词： biomimetics d.y ad.esive gecko climbing robot MEMS silicone

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