Adhesion of bioinspired nanocomposite microstructure at high temperatures

Citation data:

Applied Surface Science, ISSN: 0169-4332, Vol: 413, Page: 275-283

Publication Year:
2017
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Repository URL:
http://scholarworks.unist.ac.kr/handle/201301/21956
DOI:
10.1016/j.apsusc.2017.04.036
Author(s):
Seong, Minho, Jeong, Changyoon, Yi, Hoon, Park, Hyun-Ha, Bae, Won-Gyu, Park, Young-Bin, Jeong, Hoon Eui
Publisher(s):
Elsevier BV, ELSEVIER SCIENCE BV
Tags:
Materials Science, Adhesion, Dry adhesive, Gecko, High temperature adhesive, Nanocomposite
article description
Bioinspired dry adhesives with protruding tips offer strong, repeatable, and reversible adhesion both in normal and shear directions owing to the presence of a thin spatulate layer. However, the temperature range in which they can be used is limited because most of them are made of polymeric materials that have inherently poor thermomechanical stability. Here, we report a nanocomposite dry adhesive as a high-temperature reversible adhesive with high pull-off strength. The nanocomposite dry adhesive is fabricated by a replica-molding technique with polydimethylsiloxane (PDMS) enforced with multiwalled carbon nanotubes (MWCNTs) of different concentrations. The MWCNT/PDMS composite adhesives exhibit remarkably better thermal stability than pristine PDMS adhesives owing to the excellent thermal and mechanical properties of the MWCNTs in the composite. Furthermore, the nanocomposite adhesives have a high adhesion strength even when they are thermally annealed at high temperatures of up to 350 °C, demonstrating a strong potential as a versatile high-temperature reversible adhesive.

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