Ultra-high molecular weight polyethylene (UHMWPE) and polyamide 66 (PA66) were used as model polymers in order to conduct research on the preparation and characterization of oil-dosed phases created by supercritical fluid on polymer materials. As lubricating oil impregnates polymer material, diethylhexyl adipate (DEHA = DOA, Mw = 370) and alkyldiphenylether (ADE, Mw = 440) were used. Oil impregnation conditions were controlled to between 60 °C and 150 °C and 10–20MPa in Supercritical carbon dioxide (scCO2) environment. Experimental results showed that the total amount of oil impregnation correlated with processing temperature and duration. After impregnation, phases with a crystal structure different from the inside were observed on the polymer surface areas. The depth profile and chemical-distribution of oil-dosed phases by scCO2 impregnation were analyzed using Fourier-transform infrared (FTIR) spectroscopy. FTIR spectroscopy results have shown that it is possible to create phases having high concentrations of lubricating oil at a depth of about 25–30 micrometers from the surface of polymer materials.
- Tribology Division
Preparation and Characterization of Oil-Dosed Phases Created by Supercritical Fluid on Polymer Materials
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Hachiya, K, Kichikawa, T, & Takajo, T. "Preparation and Characterization of Oil-Dosed Phases Created by Supercritical Fluid on Polymer Materials." Proceedings of the STLE/ASME 2006 International Joint Tribology Conference. Part A: Tribomaterials; Lubricants and Additives; Elastohydrodynamic Lubrication; Hydrodynamic Lubrication and Fluid Film Bearings; Rolling Element Bearings; Engine Tribology; Machine Components Tribology; Contact Mechanics. San Antonio, Texas, USA. October 23–25, 2006. pp. 9-15. ASME. https://doi.org/10.1115/IJTC2006-12052
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