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  4. Thin-film lubrication in the water/octyl v-d-glucopyranoside system: Macroscopic and nanoscopic tribological behavior
 
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2019
Journal Article
Titel

Thin-film lubrication in the water/octyl v-d-glucopyranoside system: Macroscopic and nanoscopic tribological behavior

Abstract
The friction properties of the water-based surfactant system C8 (octyl v-d-glucopyranoside) are investigated both at the macro- and nanoscale in ring-on-plate and atomic force microscopy friction experiments, respectively. Surface characterization and measurement of the friction gap during sliding, together with the tribological behavior, show a strong shear rate dependence of the friction behavior. High shear rates of approximately 106 s1 in the macroscopic friction experiments induce a molecular alignment of the surfactants in the friction gap. This generates an anisotropic viscosity which allows a high load to be carried but exhibits low viscosity in the shear direction. When the nanoscale and macroscale friction experiments are normalized to the same shear rate, almost identical frictional behavior is observed in the two regimes.
Author(s)
Chen, W.
University of Freiburg, IMTEK
Amann, T.
Fraunhofer-Institut fĂ¼r Werkstoffmechanik IWM
Kailer, A.
Fraunhofer-Institut fĂ¼r Werkstoffmechanik IWM
RĂ¼he, J.
University of Freiburg, IMTEK
Zeitschrift
Langmuir. The ACS journal of surfaces and colloids
Project(s)
BioSis
Funder
Ministerium fĂ¼r Wirtschaft, Arbeit und Wohnungsbau Baden-WĂ¼rttemberg WM BW
DOI
10.1021/acs.langmuir.9b00383
File(s)
N-549601.pdf (1.28 MB)
Language
English
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Fraunhofer-Institut fĂ¼r Werkstoffmechanik IWM
Tags
  • thin film lubrication...

  • water-based lubricati...

  • atomic force microsco...

  • tribochemistry

  • surfactant

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