Carbon nanotube dry adhesives with temperature-enhanced adhesion over a large temperature range

Ming Xu, Feng Du, Sabyasachi Ganguli, Ajit Roy and Liming Dai ()
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Ming Xu: Center of Advanced Science and Engineering for Carbon (Case4Carbon), Case Western Reserve University
Feng Du: Center of Advanced Science and Engineering for Carbon (Case4Carbon), Case Western Reserve University
Sabyasachi Ganguli: Materials and Manufacturing Directorate, Air Force Research Laboratory
Ajit Roy: Materials and Manufacturing Directorate, Air Force Research Laboratory
Liming Dai: Center of Advanced Science and Engineering for Carbon (Case4Carbon), Case Western Reserve University

Nature Communications, 2016, vol. 7, issue 1, 1-8

Abstract: Abstract Conventional adhesives show a decrease in the adhesion force with increasing temperature due to thermally induced viscoelastic thinning and/or structural decomposition. Here, we report the counter-intuitive behaviour of carbon nanotube (CNT) dry adhesives that show a temperature-enhanced adhesion strength by over six-fold up to 143 N cm−2 (4 mm × 4 mm), among the strongest pure CNT dry adhesives, over a temperature range from −196 to 1,000 °C. This unusual adhesion behaviour leads to temperature-enhanced electrical and thermal transports, enabling the CNT dry adhesive for efficient electrical and thermal management when being used as a conductive double-sided sticky tape. With its intrinsic thermal stability, our CNT adhesive sustains many temperature transition cycles over a wide operation temperature range. We discover that a ‘nano-interlock’ adhesion mechanism is responsible for the adhesion behaviour, which could be applied to the development of various dry CNT adhesives with novel features.

Date: 2016
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DOI: 10.1038/ncomms13450

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