Abstract
This paper reports a series of studies on the lubricant properties, elastohydrodynamic film thickness, and coefficients of friction of several commercially available ester base stocks, i.e., diisooctyl phthalate (DIOP), diisodecyl phthalate (DIDP), diisotridecyl phthalate (DITDP), diisooctyl sebacate (DOS), diisotridecyl sebacate (DTDS), trihydroxymethylpropyl trioleate (TMPTO), and pentaerythritol tetraoleate (PETO). The results include densities and viscosities from 303 to 398 K, and elastohydrodynamic lubricant film thicknesses and friction in the boundary, mixed and full-film lubrication regimes measured at several temperatures, loads, and speeds. These ester base stocks have different lubrication abilities owing to their chain lengths, geometric configurations, and molecular rigidity. This study provides quantitative insight into the use of ester-based lubricants for low friction through the entire lubrication regime (boundary to full film) by utilization of suitable type and size of the ester base stocks.
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Yifeng HE. He received his B.S. and Ph.D degrees in applied chemistry from Peking University, Beijing, in 2003 and 2009 respectively. During his postgraduate period, he studied in the Department of Chemistry at Moscow State University, Russia, during 2004 and 2005. He joined Sinopec Research Institute of Petroleum Processing in 2009, and now is a senior research engineer. From 2014 to 2015, he was a visiting scholar in the Center for Surface Engineering and Tribology at Northwestern University, USA. His research interests are in the development of lubricating oils and greases, and investigation on their lubrication properties and tribological behaviours.
Qian WANG. She received her Ph.D degree from Northwestern University, USA, 1993. She taught for five years at Florida International University, Miami, FL, USA, and is now a professor in the Mechanical Engineering Department at Northwestern University, USA. Her research interests are in theories and modelling of tribological interfaces and developments of robust and energy effective tribological systems. She received the International Award from Society of Tribologists and Lubrication Engineers (STLE) in 2015; she was elected Fellow of the American Society of Mechanical Engineers (ASME) in 2009 and STLE in 2007.
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He, Y., Zolper, T.J., Liu, P. et al. Elastohydrodynamic lubrication properties and friction behaviors of several ester base stocks. Friction 3, 243–255 (2015). https://doi.org/10.1007/s40544-015-0090-6
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DOI: https://doi.org/10.1007/s40544-015-0090-6