Nanorheology of strongly confined oligomeric lubricants

E. Manias, G. Ten Brinke, G. Hadziioannou

Research output: Contribution to journalArticle

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Abstract

Lubricant films confined in nanometric slit pores and subjected to shear flow are studied by non-equilibrium molecular dynamics in a planar Couette flow geometry. An inhomogeneous, layered density profile is developed near the confining surfaces and the shape of the velocity profile across the pore depends on the wall energetics. A nonlinear velocity profile is developed and both slippage located at the wall and inside the film (interlayer slip) are observed. The local slope of the velocity profile and the location of the slippage plane are determined by the adsorption energy of the wall. Shear-induced changes of the adsorbed chain conformations are discussed in relation with the molecular mechanism of slippage and the magnitude of the interlayer slip.

Original languageEnglish (US)
Pages (from-to)319-328
Number of pages10
JournalJournal of Computer-Aided Materials Design
Volume3
Issue number1-3
DOIs
StatePublished - Jan 1 1996

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Computer Science Applications
  • Computational Theory and Mathematics

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