NDLI: Molecular Rheology of Perfluoropolyether Lubricant via Nonequilibrium Molecular Dynamics Simulation

Content Provider	IEEE Xplore Digital Library
Author	Hyoung Jin Choi Qian Guo Chung, P.S. Jhon, M.S.
Copyright Year	1965
Abstract	Rheological properties of perfluoropolyether (PFPE) systems can be particularly important in designing effective lubricants that control the friction and wear in their tribological applications. Using equilibrium/nonequilibrium molecular dynamics (MD) simulation, we examined the rheological properties of PFPE lubricant, such as viscosity and viscoelastic properties, by observing the time-dependent system in shear motion. Strong dependence of PFPE bulk viscosity on PFPE molecular structure (e.g., end group functionality) and external conditions (e.g., temperature) was observed. Via a nonlinear regression method, we further extracted the relaxation time spectrum based on our simulated dynamic moduli data, where the importance of end group couplings was emphasized. In addition, we adopted two solid surfaces to mimic the head and disk, which will provide a further understanding in lubricant nanorheology and nanotribology
Sponsorship	IEEE Magnetics Society
Starting Page	903
Ending Page	905
Page Count	3
File Size	275402
File Format	PDF
ISSN	00189464
Volume Number	43
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-02-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Rheology Lubricants Viscosity Nonlinear dynamical systems Control systems Friction Elasticity Temperature dependence Data mining Couplings viscoelasticity Molecular dynamics (MD) simulation perfluoropolyether relaxation time spectrum
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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The Viscoelastic Behavior of Perfluoropolyether Lubricants

Atomistic and Molecular Effects on the Surface Morphology and Film Conformation of Perfluoropolyether Lubricant Layer

Perfluoropolyether Lubricant Interactions With Novel Overcoat via Coarse-Grained Molecular Dynamics

Rheology of perfluoropolyether lubricants

Nano-Mechanics of Perfluoropolyether Films: Compression Versus Tension

An Application of a Free Volume Model to Lubricant Rheology I—Dependence of Viscosity on Temperature and Pressure

Effect of Lubricant Fragments on Lubricant Transfer: A Molecular Dynamics Simulation

Film Conformation and Dynamic Properties of Atomistically Architectured Perfluoropolyethers on the Carbon Overcoated Surfaces

Humidity Effects on the Relaxation of Perfluoropolyether Lubricant Films

Molecular Rheology of Perfluoropolyether Lubricant via Nonequilibrium Molecular Dynamics Simulation

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