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    Initial studies on lubricity and surface properties of selected ionic liquids

    Year: 2011

    Journal: Journal of KONES Powertrain and transport 2011, 18 (1), 20121211

    Authors: Tomasz Jan Kaldonski, Lukasz Gryglewicz, Mateusz Stanczyk, Tadeusz Kaldonski

    Organizations: Military University of Technology, Faculty of Mechanical Engineering, Institute of Motor Vechiles and transportation Gen. S. Kaliskiengo Street 2, 00-908 Warsaw, Poland

    The paper discusses the results of the studies on the surface properties and lubricating abilities of five ionic liquids compared to a high quality gear oil: Mobilube 1SHC 75W90 and two base oils: PAO-6 and SN-650. The investigated ionic liquids were: 1) tetrafluoroborate 1- benzyl-3-methylmidazolium, 2) bis (trifluoromethylsulfonyl) imide 3-methyl-1- propylpyridinium, 3) bis (trifluoromethylsulfonyl) imide 1,2-dimethyl-3-propylimidazolium, 4) bis (trifluoromethylsulfonyl) imide trihexyltetradecylphosphonium), 5) tetrafluoroborate trihexyltetradecylphosphonium. The density, surface tension and wetting angle as well as dynamic and kinematic viscosity were measured. Next, the lubricity properties were evaluated using the four-ball tester. The research results showed the more better lubricity properties of ionic liquids than the base oils. The research results showed the more better lubricity properties of ionic liquids than the base oils. The ionic liquids had the comparable properties to a high quality gear oil. Obtained results of these preliminary studies confirmed a possibility of using selected ionic liquids as new lubricants. These compounds can probably replace the lubricants used so far and find a wide scope of application in lubrication technology in the future. However, particular implementations require further complex studies.