Results
Title

Conductive and Tribological Properties of Lithium-Based Ionic Liquids as Grease Base Oil.

Authors

Ge, Xiangyu; Xia, Yanqiu; Shu, Zongying

Abstract

This article reports several conductive greases prepared by ionic liquids (ILs) that are synthesized by mixing lithium tetrafluoroborate (LiBF4) or lithium bis(trifluoromethane-sulfonyl) imide (LiNTf2) in diglyme (G2) and tetraglyme (G4) with appropriate weight ratios at room temperature (RT). The ILs have good solution in poly(ethylene glycol-ran-propylene glycol) monobutyl ether (PAG) and thus can be used as a base oil for preparing grease for steel–steel contacts. The electrical conductive properties of the grease prepared with the mixed oil of PAG plus ILs were evaluated using the DDSJ-308A conductivity tester, GEST-121 volume surface resistance tester, and HLY-200A circuit resistance tester. Combining the free volume with viscosity, the conductivity is inversely proportional to viscosity. The tribological properties were investigated using an MFT-R4000 reciprocating friction and wear tester. The results demonstrated that the prepared greases possess better conductive and tribological properties than the commercial grease with Cu powder as an additive.

Subjects

IONIC liquids; LUBRICATION & lubricants research; TETRAFLUOROBORATES; FLUOBORATES; TRIBOLOGY

Publication

Tribology Transactions, 2015, Vol 58, Issue 4, p686

ISSN

1040-2004

Publication type

Academic Journal

DOI

10.1080/10402004.2015.1012772