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

Xiangyu Ge; Yanqiu Xia; Zongying Shu

doi:10.1080/10402004.2015.1012772

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

Xiangyu Ge, Yanqiu Xia, Zongying Shu

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

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.

Original language	English
Pages (from-to)	686-690
Number of pages	5
Journal	Tribology Transactions
Volume	58
Issue number	4
DOIs	https://doi.org/10.1080/10402004.2015.1012772
Publication status	Published - 4 Jul 2015
Externally published	Yes

Keywords

Conductivity
Contact Resistance
Grease
Ionic Liquid
Tribology
Volume Resistivity

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10.1080/10402004.2015.1012772

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title = "Conductive and Tribological Properties of Lithium-Based Ionic Liquids as Grease Base Oil",

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.",

keywords = "Conductivity, Contact Resistance, Grease, Ionic Liquid, Tribology, Volume Resistivity",

author = "Xiangyu Ge and Yanqiu Xia and Zongying Shu",

note = "Publisher Copyright: {\textcopyright} 2015, Copyright {\textcopyright} Society of Tribologists and Lubrication Engineers.",

year = "2015",

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doi = "10.1080/10402004.2015.1012772",

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T1 - Conductive and Tribological Properties of Lithium-Based Ionic Liquids as Grease Base Oil

AU - Ge, Xiangyu

AU - Xia, Yanqiu

AU - Shu, Zongying

PY - 2015/7/4

Y1 - 2015/7/4

N2 - 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.

AB - 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.

KW - Conductivity

KW - Contact Resistance

KW - Grease

KW - Ionic Liquid

KW - Tribology

KW - Volume Resistivity

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DO - 10.1080/10402004.2015.1012772

M3 - Article

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SN - 1040-2004

VL - 58

SP - 686

EP - 690

JO - Tribology Transactions

JF - Tribology Transactions

IS - 4

ER -

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

Abstract

Keywords

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