Oil miscible phosphonium-phosphate ionic liquid as novel antiwear and antipitting additive for low-viscosity rear axle lubricants

Roy, Sougata; Speed, Lake; Viola, Michael B.; Luo, Huimin; Leonard, Donovan N.; Qu, Jun

doi:10.1016/j.wear.2020.203588

Cited by 15 publications

(5 citation statements)

References 44 publications

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“…This study chose to use the single additive blends at a constant 0.5 wt % concentration for the candidate ILs and ZDDP in both the PAG and the OSP base oils in tribological evaluation. While the ILs’ viscosity often is significantly higher than the base oil, the increase of the oil viscosity is actually rather small at a low concentration, such as 1%, based on the Refutas equation and had been repeatedly verified by measurements in our previous work. ,− For example, adding an oil-soluble IL with up to 100× higher viscosity at a 0.5 wt % concentration into a base oil would only increase the oil viscosity by less than 2% when calculated using the Refutas equation. In this study, the viscosity of PAG + 0.5% [N 4441 ][DBP] at 23, 40, 82, and 100 °C was measured to be 67.2, 32.6, 10.5, and 7.0 cSt, respectively, which are very similar to those of the neat PAG base oil (67.0, 33.0, 10.2, and 7.1 cSt, respectively; see Table S-2).…”

Section: Methodsmentioning

confidence: 67%

“…The TGA curves of the base oils and additives are shown in Figure 3. Some ILs seemed to be more thermally stable than the ZDDP that had 28 �that were developed for engine 52,53 and gear 36,37 lubrication. Table 1 summarizes the survival and reproduction data of Ceriodaphnia in the 7-day chronic toxicity tests for PAG-based lubricants at 10 ppm treatment.…”

Section: ■ Resultsmentioning

confidence: 99%

“…Chronic ecotoxicity tests were carried out on the new candidate ILs in side-by-side comparison against the commercial ZDDP and two earlier ILs[P 8888 ][DEHP] and [N 888 H][DEHP]that were developed for engine , and gear , lubrication. Table summarizes the survival and reproduction data of Ceriodaphnia in the 7-day chronic toxicity tests for PAG-based lubricants at 10 ppm treatment.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Minimizing Toxicity and Optimizing Lubricity of Ionic Liquids for Eco-Friendly Lubrication

He,

Luo,

Mathews

et al. 2024

ACS Sustainable Chem. Eng.

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As much as 60 million liters of lubricating fluids end up in the environment annually, and thus, the environmental impact of lubricants is increasingly recognized in addition to meeting the rheological and tribological requirements. Although US Environmental Protection Agency-approved environmentally acceptable base fluids are available, there is a lack of additives that are both nontoxic and effective in wear protection. This study reports the successful development of a new class of ionic liquids (ILs) with demonstrated significantly lower aquatic toxicity and superior friction reduction and wear protection capabilities compared with a commercial lubricant additive and some ILs reported in the literature. Specifically, ammonium phosphate and phosphonium phosphate ILs with four-carbon alkyls have been identified with balanced oil solubility, thermal stability, toxicity, and lubricity, which provide fundamental insights for future development of eco-friendly ILs.

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Section: Methodsmentioning

confidence: 67%

Section: ■ Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Minimizing Toxicity and Optimizing Lubricity of Ionic Liquids for Eco-Friendly Lubrication

He,

Luo,

Mathews

et al. 2024

ACS Sustainable Chem. Eng.

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“…Since 2001, numerous studies have been conducted to investigate the lubrication capacity of ILs. ILs were used as neat lubricant [5][6][7][8][9] and as lubricant additives [10][11][12][13][14][15][16][17]. In the last few decades, NPs have been widely used as lubricant additives and improved the tribological characteristics [18][19][20]11,[21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Tribological evaluation of rice bran oil based ionanolubricants containing ionic liquids and nanoparticles

Kumar

Garg

2023

Tribology - Materials, Surfaces & Interfaces

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Environmental concerns and depleting mineral oil resources have forced us to develop environmentally acceptable lubricants. In this study, tribological properties of rice bran oil containing imidazolium-based ionic liquid 1-ethyl 3methylimidazolium dicyanamide ([EMIM][DCN]) (ILa), phosphonium based ionic liquid Trihexyltetradecylphosphonium bis (2,4,4-trimethylpentyl) phosphinate ([P 66614 ][BTMPP]) (ILb) and titanium oxide (TiO 2 ) nanoparticles (NPs) as hybrid additives have been investigated using four ball tester. Rice bran oil based ionanolubricants (INLs) were formulated with different concentrations of ILa, ILb and TiO 2 NPs. Among all investigated ionanolubricant samples, rice bran oil containing 0.03 ∅ of TiO 2 NPs and 0.5 vol.% of ILa showed the lowest AWSD. The improved characteristics of rice bran oil based INLs can be attributed to the ball bearing effect and tribofilm formation.

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“…This generates hydrogen halides, which are highly corrosive to metal substrate surfaces. The design, preparation, and development of low-sulfur, low-phosphorus, and halogen-free ionic liquids is necessary to reduce corrosion and environmental pollution in the field of tribology [21,22]. Li et al [23] investigated the ILs P 888 pDABD and P 888 pDOSS as lubricants for titanium alloys.…”

Section: Introductionmentioning

confidence: 99%

The Tribological Properties of Low-Sulfur and Low-Phosphorus Halogen-Free Ionic Liquids as Lubricants for the Nickel-Based Alloy Inconel 690

Guo,

Liu,

et al. 2023

Coatings

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In this study, we synthesized three low-sulfur and low-phosphorus ionic liquids (ILs). These were N88816P8, P88816P8, and P88816DOSS. The viscosity and thermal stability of the three ILs were analyzed. The tribological properties and lubrication mechanisms of the three ILs were investigated as lubricants for a carbide ball–Inconel 690 nickel-based alloy friction pair and compared at 50 °C and 150 °C. The wear spots of the carbide ball and nickel-based alloy disc samples were characterized using SEM and EDS. The experimental results revealed that P88816P8 had excellent tribological properties. The lubrication mechanism of P88816P8 as a lubricant for the carbide ball–Inconel 690 nickel-based alloy friction pair was investigated using XPS. The excellent friction reduction and anti-wear properties of P88816P8 could be attributed to the tribo-chemistry between P88816P8 and Inconel 690 as well as the formation of a tribo-film on the wear-spot surface. This high-performance IL, suitable for carbide ball–Inconel 690 contact, will be applied to a cutting process of Inconel 690.

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Oil miscible phosphonium-phosphate ionic liquid as novel antiwear and antipitting additive for low-viscosity rear axle lubricants

Cited by 15 publications

References 44 publications

Minimizing Toxicity and Optimizing Lubricity of Ionic Liquids for Eco-Friendly Lubrication

Minimizing Toxicity and Optimizing Lubricity of Ionic Liquids for Eco-Friendly Lubrication

Tribological evaluation of rice bran oil based ionanolubricants containing ionic liquids and nanoparticles

The Tribological Properties of Low-Sulfur and Low-Phosphorus Halogen-Free Ionic Liquids as Lubricants for the Nickel-Based Alloy Inconel 690

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