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Frensemeier M, Kaiser JS, Frick CP, et al. Temperature-Induced Switchable Adhesion using Nickel-Titanium-Polydimethylsiloxane Hybrid Surfaces. Adv Funct Mater. 2015;25(20):3013-3021doi: 10.1002/adfm.201500437.
Frensemeier, M., Kaiser, J. S., Frick, C. P., Schneider, A. S., Arzt, E., Fertig, R. S., & Kroner, E. (2015). Temperature-Induced Switchable Adhesion using Nickel-Titanium-Polydimethylsiloxane Hybrid Surfaces. Advanced functional materials, 25(20), 3013-3021. https://doi.org/10.1002/adfm.201500437
Frensemeier, Mareike, et al. "Temperature-Induced Switchable Adhesion using Nickel-Titanium-Polydimethylsiloxane Hybrid Surfaces." Advanced functional materials vol. 25,20 (2015): 3013-3021. doi: https://doi.org/10.1002/adfm.201500437
Frensemeier M, Kaiser JS, Frick CP, Schneider AS, Arzt E, Fertig RS, Kroner E. Temperature-Induced Switchable Adhesion using Nickel-Titanium-Polydimethylsiloxane Hybrid Surfaces. Adv Funct Mater. 2015 May;25(20):3013-3021. doi: 10.1002/adfm.201500437. Epub 2015 Apr 08. PMID: 26120295; PMCID: PMC4478996.
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Adv Funct Mater. 2015 May;25(20):3013-3021. doi: 10.1002/adfm.201500437. Epub 2015 Apr 08.

Temperature-Induced Switchable Adhesion using Nickel-Titanium-Polydimethylsiloxane Hybrid Surfaces.

Advanced functional materials

Mareike Frensemeier, Jessica S Kaiser, Carl P Frick, Andreas S Schneider, Eduard Arzt, Ray S Fertig, Elmar Kroner

Affiliations

  1. Saarland University Campus D 2 2, 66123, Saarbrücken, Germany ; INM - Leibniz Institute for New Materials Campus D 2 2, 66123, Saarbrücken, Germany.
  2. INM - Leibniz Institute for New Materials Campus D 2 2, 66123, Saarbrücken, Germany.
  3. Department of Mechanical Engineering, University of Wyoming Department 3295, 1000 E University Ave, Laramie, WY, 82071, USA.

PMID: 26120295 PMCID: PMC4478996 DOI: 10.1002/adfm.201500437

Abstract

A switchable dry adhesive based on a nickel-titanium (NiTi) shape-memory alloy with an adhesive silicone rubber surface has been developed. Although several studies investigate micropatterned, bioinspired adhesive surfaces, very few focus on reversible adhesion. The system here is based on the indentation-induced two-way shape-memory effect in NiTi alloys. NiTi is trained by mechanical deformation through indentation and grinding to elicit a temperature-induced switchable topography with protrusions at high temperature and a flat surface at low temperature. The trained surfaces are coated with either a smooth or a patterned adhesive polydimethylsiloxane (PDMS) layer, resulting in a temperature-induced switchable surface, used for dry adhesion. Adhesion tests show that the temperature-induced topographical change of the NiTi influences the adhesive performance of the hybrid system. For samples with a smooth PDMS layer the transition from flat to structured state reduces adhesion by 56%, and for samples with a micropatterned PDMS layer adhesion is switchable by nearly 100%. Both hybrid systems reveal strong reversibility related to the NiTi martensitic phase transformation, allowing repeated switching between an adhesive and a nonadhesive state. These effects have been discussed in terms of reversible changes in contact area and varying tilt angles of the pillars with respect to the substrate surface.

Keywords: adhesion; bioinspired; nickel–titanium; shape-memory

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