Ionic Liquids as Grease Base Liquids
AbstractThe rheological characteristics of one mineral oil and two ionic liquid (IL) based lubricating greases were explored as a function of thickener concentration. The ILs used are 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([BMIM][TFSI]) and trihexyltetradecylphosphonium bis(trifluoromethylsulfonyl)imide ([P6,6,6,14][TFSI]), with polytetra-fluoroethylene (PTFE) particles used as thickeners. Greases with different base liquid concentrations (60–80 wt %) were investigated using small-amplitude oscillatory shear and viscous flow measurements, and contact angle measurements probed adhesion at base liquid–PTFE interfaces. Rheological properties are influenced by base liquid–PTFE adhesion and the chemical structure of the grease base liquids. With the addition of thickener, the greases generally have higher elasticity, strain resistance, and frequency independent properties. Viscometric rheological tests illustrate non-Newtonian shear-thinning behaviour for all greases. [BMIM][TFSI] based greases show the most elastic properties and strain resistance, as well as the highest initial and lowest final viscosities of the greases tested. View Full-Text
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Mozes, R.; Cooper, P.K.; Atkin, R.; Li, H. Ionic Liquids as Grease Base Liquids. Lubricants 2017, 5, 31.
Mozes R, Cooper PK, Atkin R, Li H. Ionic Liquids as Grease Base Liquids. Lubricants. 2017; 5(3):31.Chicago/Turabian Style
Mozes, Robert; Cooper, Peter K.; Atkin, Rob; Li, Hua. 2017. "Ionic Liquids as Grease Base Liquids." Lubricants 5, no. 3: 31.
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