Friction behavior of a microstructured polymer surface inspired by snake skin

Baum, M. J., Heepe, L. and Gorb, S. N. (2014) Friction behavior of a microstructured polymer surface inspired by snake skin Beilstein Journal of Nanotechnology, 5 . pp. 83-97. DOI 10.3762/bjnano.5.8.

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Abstract

The aim of this study was to understand the influence of microstructures found on ventral scales of the biological model, Lampropeltis getula californiae, the California King Snake, on the friction behavior. For this purpose, we compared snake-inspired anisotropic microstructured surfaces to other microstructured surfaces with isotropic and anisotropic geometry. To exclude that the friction measurements were influenced by physico-chemical variations, all friction measurements were performed on the same epoxy polymer. For frictional measurements a microtribometer was used. Original data were processed by fast Fourier transformation (FFT) with a zero frequency related to the average friction and other peaks resulting from periodic stick-slip behavior. The data showed that the specific ventral surface ornamentation of snakes does not only reduce the frictional coefficient and generate anisotropic frictional properties, but also reduces stick-slip vibrations during sliding, which might be an adaptation to reduce wear. Based on this extensive comparative study of different microstructured polymer samples, it was experimentally demonstrated that the friction-induced stick-slip behavior does not solely depend on the frictional coefficient of the contact pair.

Document Type: Article
Keywords: fast Fourier transformation; friction; polymer; snake inspired; stick-slip
Research affiliation: Kiel University
OceanRep > The Future Ocean - Cluster of Excellence
Refereed: Yes
DOI etc.: 10.3762/bjnano.5.8
ISSN: 2190-4286
Projects: Future Ocean
Date Deposited: 05 Oct 2017 11:21
Last Modified: 05 Oct 2017 11:21
URI: http://eprints.uni-kiel.de/id/eprint/39680

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