Three oilââ?¬â??miscible phosphonium ionic liquids with different structures were synthesized\nand used as additives for a Poly Alpha Olefin 10 (PAO 10) lithium lubricating grease. Different from\nother additives, the ionic liquids participated in saponification and were trapped in the entanglement\nnetwork formed by the thickener. The effects of the ionic liquids on the rheological properties of\nlithium lubricating grease were characterized through a small-amplitude oscillatory shear (SAOS)\nmeasurement. The tribological performances of the lubricating greases were determined on a four-ball\nfriction tester. The addition of phosphonium ionic liquids caused a decrease in the storage (G) and\nloss (G) modulus of lubricating grease. However, the ionic liquids were found to be effective\nlubricant additives for improving the friction-reducing and antiwear properties of PAO 10 lithium\nlubricating grease.
Loading....