The Influence of Ionic Liquid on Tribological Properties of WS2 Nano Lubricating Oil
Nano tungsten disulfide has excellent lubrication performance,but its easy agglomeration in lubricating oil af-fects its anti-wear and friction reduction performance.To improve the anti-wear and friction reduction performance of nano WS2,a phosphate ionic liquid was added to WS2 nano lubricating oil,and its frictional properties were tested using four-ball friction tester.XPS,EDS,and electron microscopy were used to characterize the worn surface of the steel balls.The re-sults show that although the friction coefficient of nano lubricating oil is slightly increased after adding ionic liquid,com-pared to the base oil,ionic liquids can still reduce the friction coefficient by a maximum of 28％,and can significantly re-duce the wear scar diameter,with a maximum reduction of 44％.In the friction process,the ionic liquid reacts with WS2 to generate PW,which acts as a catalyst to accelerate the oxidation reaction in the friction process,and the generated com-pound acts as a chemical friction film to reduce wear and improve the anti-wear and friction reduction performance of lu-bricating oil.
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