Tribological Characteristics of Alkylimidazolium Diethyl Phosphates Ionic Liquids as Lubricants for Steel–Steel Contact

Zhang, Lin; Duan, Feng; Xu, Bin

doi:10.1007/s11249-009-9412-z

Cited by 82 publications

(62 citation statements)

References 24 publications

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“…Since this report, research has focused on more specific systems, for example, the steel on steel system has had the majority of the interest [16][17][18][19][20][21][22][23][24][25][26]. The more challenging systems in terms of efficient lubrication, including steel/aluminium and titanium/steel, have also received attention [7,15,[27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42].…”

Section: Ionic Liquidsmentioning

confidence: 99%

“…Other non-fluorinated anions that include known useful elements, such as phosphorus (e.g., dibutylphosphate, DBP) and boron (e.g., bis(oxalato)borate, BOB) have also been studied. In the wear environment, all of these anions were assumed to undergo favourable reactions to result in protective tribofilms [22,23,25,[36][37][38][39].…”

Section: Anionsmentioning

confidence: 99%

“…As mentioned above, the imidazolium cation was initially investigated, and the alkyl chain length has been varied to investigate its effect on friction and wear [18,19,23,29]. Imidazolium has also been functionalised to incorporate groups that may more readily adsorb onto a surface, such as phosphonyls and esters [26,32].…”

Section: Cationsmentioning

confidence: 99%

“…In an effort to improve the protective tribofilm formation, phosphate anions were chosen to mimic the traditional anti-wear additives, such as zinc dialkyl dithiophosphate (ZDDP) [22,23,25,36,45]. Anions, such as dimethylphosphate and diphenylphosphate, have been investigated and have shown similar or lower wear than NTf 2 and FAP for both the steel/steel and aluminium/steel systems [22,38].…”

Section: Overview Of the Application Of Ils In Different Materials Commentioning

confidence: 99%

“…X-Ray photoelectron spectroscopy (XPS) has been the most widely used, due to its ability to identify not only the elements present on the wear scar surface, but also the chemical state of the atom [6,[15][16][17][18][19][20][21][22][23]25,[28][29][30]32,33,35,38,40,44,47,48,[51][52][53][54]. Scanning electron microscopy (SEM) has been used to identify the type of wear occurring based on the wear scars appearance with the associated energy dispersive X-ray spectroscopy (EDX) used to ascertain the elements present on the wear scar [15,17,[19][20][21]23,25,[28][29][30][31][32][33][34][35][36][37][40][41][42][43]…”

Section: Surface Characterisationmentioning

confidence: 99%

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A Review of Ionic Liquid Lubricants

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Due to ever increasing demands on lubricants, such as increased service intervals, reduced volumes and reduced emissions, there is a need to develop new lubricants and improved wear additives. Ionic liquids (ILs) are room temperature molten salts that have recently been shown to offer many advantages in this area. The application of ILs as lubricants in a diverse range of systems has found that these materials can show remarkable protection against wear and significantly reduce friction in the neat state. Recently, some researchers have shown that a small family of ILs can also be incorporated into non-polar base oils, replacing traditional anti-wear additives, with excellent performance of the neat IL being maintained. ILs consist of large asymmetrical ions that may readily adsorb onto a metal surface and produce a thin, protective film under boundary lubrication conditions. Under extreme pressure conditions, certain IL compounds can also react to form a protective tribofilm, in particular when fluorine, phosphorus or boron atoms are present in the constituent ions.

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Section: Ionic Liquidsmentioning

confidence: 99%

Section: Anionsmentioning

confidence: 99%

Section: Cationsmentioning

confidence: 99%

Section: Overview Of the Application Of Ils In Different Materials Commentioning

confidence: 99%

Section: Surface Characterisationmentioning

confidence: 99%

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A Review of Ionic Liquid Lubricants

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Nanometer‐Thick Ionic Liquids as Boundary Lubricants

Gong

2017

Adv Eng Mater

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Ionic liquids (ILs) are fascinating materials with unique combination of solid and liquid properties. Due to high thermal stability and promising tribological properties, there have been increasing research interests in applying ILs as boundary lubricants. In this review, the authors will discuss the recent progress on this topic with the emphasis on the relationship between the molecular arrangement of ILs confined to a solid and the tribological properties. First, the fundamentals on boundary lubrication and the state-ofthe-art lubricants will be reviewed briefly. Second, the progress on the molecular structure of ILs confined to a solid surface will be discussed. Afterward, the experimental and computational efforts on the ILs as boundary lubricants will be discussed in details with emphasis on the effect of IL structure, solid substrates, and IL-soild interaction. Finally, the future research directions will be discussed.

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New Frontiers in Materials Science Opened by Ionic Liquids

et al. 2010

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Ionic liquids (ILs) including ambient-temperature molten salts, which exist in the liquid state even at room temperature, have a long research history. However, their applications were once limited because ILs were considered as highly moisture-sensitive solvents that should be handled in a glove box. After the first synthesis of moisture-stable ILs in 1992, their unique physicochemical properties became known in all scientific fields. ILs are composed solely of ions and exhibit several specific liquid-like properties, e.g., some ILs enable dissolution of insoluble bio-related materials and the use as tailor-made lubricants in industrial applications under extreme physicochemical conditions. Hybridization of ILs and other materials provides quasi-solid materials, which can be used to fabricate highly functional devices. ILs are also used as reaction media for electrochemical and chemical synthesis of nanomaterials. In addition, the negligible vapor pressure of ILs allows the fabrication of electrochemical devices that are operated under ambient conditions, and many liquid-vacuum technologies, such as X-ray photoelectron spectroscopy (XPS) analysis of liquids, electron microscopy of liquids, and sputtering and physical vapor deposition onto liquids. In this article, we review recent studies on ILs that are employed as functional advanced materials, advanced mediums for materials production, and components for preparing highly functional materials.

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Tribological Characteristics of Alkylimidazolium Diethyl Phosphates Ionic Liquids as Lubricants for Steel–Steel Contact

Cited by 82 publications

References 24 publications

A Review of Ionic Liquid Lubricants

A Review of Ionic Liquid Lubricants

Nanometer‐Thick Ionic Liquids as Boundary Lubricants

New Frontiers in Materials Science Opened by Ionic Liquids

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