Non-halogenated Ionic Liquid Dramatically Enhances Tribological Performance of Biodegradable Oils

2021 ◽

pp. 135065012098488

Author(s):

Waleed Al-Sallami ◽

Pourya Parsaeian ◽

Abdel Dorgham ◽

Anne Neville

Keyword(s):

Ionic Liquid ◽

High Temperature ◽

Friction And Wear ◽

Tribological Performance ◽

Considerable Reduction ◽

Zinc Dialkyldithiophosphate ◽

Lubrication Mechanism ◽

Wear Coefficient ◽

Wear Performance ◽

Micro Scale

Trihexyltetradecylphosphonium bis(2-ethylhexyl)phosphate (phosphonium phosphate) ionic liquid is soluble in non-polar lubricants. It has been proposed as an effective anti-wear additive comparable to zinc dialkyldithiophosphate. Previously, phosphonium phosphate has shown a better anti-wear performance under some conditions such as high temperature. In this work, the tribological performance and the lubrication mechanism of phosphonium phosphate are compared with that of zinc dialkyldithiophosphate when lubricating silicon under various tribological conditions. This can lead to an understanding of the reasons behind the superior anti-wear performance of phosphonium phosphate under some conditions. A micro-scale study is conducted using a nanotribometer. The results show that both additives lead to a considerable reduction in both friction and wear coefficients. The reduction in the wear coefficient is mainly controlled by the formation of the tribofilm on the rubbing surfaces. Zinc dialkyldithiophosphate can create a thicker tribofilm, which results in a better anti-wear performance. However, the formation of a thicker film will lead to a faster depletion and thus phosphonium phosphate can provide better anti-wear performance when the depletion of zinc dialkyldithiophosphate starts.

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Improving tribological performance of fluoroether rubber composites by ionic liquid modified graphene

Composites Science and Technology ◽

10.1016/j.compscitech.2018.11.041 ◽

2019 ◽

Vol 170 ◽

pp. 109-115 ◽

Cited By ~ 8

Author(s):

Hao Wang ◽

Hui Zhang ◽

Jihua Zhang ◽

Yunfeng Zhao

Keyword(s):

Ionic Liquid ◽

Tribological Performance ◽

Rubber Composites ◽

Modified Graphene

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Tribological Performance of an Imidazolium Ionic Liquid-Functionalized SiO2@Graphene Oxide as an Additive

ACS Applied Materials & Interfaces ◽

10.1021/acsami.1c16030 ◽

2021 ◽

Author(s):

Wei Song ◽

Jincan Yan ◽

Hongbing Ji

Keyword(s):

Ionic Liquid ◽

Graphene Oxide ◽

Tribological Performance ◽

Imidazolium Ionic Liquid

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Ionic Liquid Crystals in Tribology

Lubricants ◽

10.3390/lubricants7090072 ◽

2019 ◽

Vol 7 (9) ◽

pp. 72 ◽

Cited By ~ 9

Author(s):

M.D. Avilés ◽

C. Sánchez ◽

R. Pamies ◽

J. Sanes ◽

M.D. Bermúdez

Keyword(s):

Molecular Structure ◽

Ionic Liquid ◽

Ionic Liquids ◽

Liquid Crystals ◽

Tribological Performance ◽

Wear Rates ◽

Fatty Acid Derivatives ◽

Potential Applications ◽

Ionic Liquid Crystals ◽

Definition Of

The present work intends to provide a brief account of the most recent advances in the use of ionic liquid crystals (ILCs) in the field of tribology, that is, the development of new lubricants with the ability to reduce the coefficients of friction and the wear rates of materials under sliding conditions. After a definition of ILCs and their relationship with neutral liquid crystals (LCs) and ionic liquids (ILs), the review will be focused on the influence of molecular structure and composition on the tribological performance, the combination with base oils, surfactants or water, and the different sliding configuration and potential applications. The main mechanisms proposed in order to justify the lubricating ability of ILCs will be analyzed. Special emphasis will be made for recent results obtained for fatty acid derivatives due to their renewable and environmentally friendly nature.

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Tribological Properties of the Overbased Calcium Sulfonate Complex Greases Containing Different Lubricant Additives

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.645.133 ◽

2013 ◽

Vol 645 ◽

pp. 133-136

Author(s):

Peng Qiao ◽

Yan Qiu Xia ◽

Xiang Yu Ge

Keyword(s):

Ionic Liquid ◽

Tribological Properties ◽

Friction And Wear ◽

Sliding Friction ◽

Tribological Performance ◽

Mining Equipment ◽

Wear Properties ◽

Friction Tester ◽

Calcium Sulfonate ◽

Friction And Wear Properties

Overbased calcium sulfonate complex greases have excellent friction and wear properties and have been widely used in metallurgy and mining equipment. The effects and tribological performance of molybdenum dialkydithiocarbamate (MoDTC) and ionic liquid 1-(2-hydroxyethyl)-3-methylimidazolium bis (triﬂuoromethylsulfonyl) imide ([C2OHMim][NTf2]), 1-(2-hydroxyethyl)-3-hexylimidazolium bis (triﬂuoromethylsulfonyl) imide ([C2OHHim][NTf2s]), added in overbased calcium sulfonate complex grease as additives were investigated by using reciprocating ball-on-disk sliding friction tester. The results showed that the two kinds of additives with a certain range of concentration could improve the tribological properties of greases.

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