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Phosphonium/Phosphate Ionic Liquids As Lubricant Additives: The Synthesis And Testing Of Six Novel Ils, Matthew Scott Welmers

Graduate Theses - Chemistry and Biochemistry

In this study, ionic liquids (ILs) are defined as ionic materials with a melting temperature >100oC. ILs are characterized by their organic moieties which prevent crystallization, forcing the liquid phase. ILs are desirable as lubricant additives because of their ability to be fine-tuned by varying the identity of the cation/anion as well as the various organic functional moieties therein. Several novel phosphonium/phosphate ILs have been successfully synthesized via a simple, straightforward process. In this work a series of symmetric and asymmetric anionic phosphodiesters are developed and coordinated with two asymmetric alkyl phosphonium cations. These ILs are tested in SAE 10W30 …