Ionic Liquid-Nanoparticle-Based Hybrid-Nanolubricant Additives for Potential Enhancement of Tribological Properties of Lubricants and Their Comparative Study with ZDDP

Maurya, Upendra; Vasu, V.; Kashinath, Dhurke

doi:10.1007/s11249-021-01551-6

Cited by 25 publications

(7 citation statements)

References 61 publications

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“…This increase in friction coefficient with ZnO NPs aligns with previous studies. 14,60 The stability in friction during the test is explained by the rolling mechanism facilitated by the spherical shape of ZnO NPs, converting sliding friction into rolling friction, along with their mending effect. 61 Comparing to R + ZDDP lubricant, the addition of ZnO in R100 resulted in a lower friction coefficient at 100 °C.…”

Section: Resultsmentioning

confidence: 99%

“…11,12 However, it is important to note that limited research has investigated the hybrid combination of specific types of ILs, NPs, and ZDDP. 13,14 Sharma et al 13 found that polytetrafluoroethylene NPs interact with ZDDP and phosphonium-based ILs to form tribofilms, leading to superior tribological performance. The synergistic or antagonistic behavior of additives mixture is complicated and still needs to study further.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of tribological behavior of a circulation oil with ionic liquid and hybrid additives

Ta,

Horng

2023

Proceedings of the Institution of Mechanical Engineers, Part J:

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In this study, the synergistic effects of methyltrioctylammonium bis(trifluoromethylsulfonyl)imide [N1888] [NTf2] ionic liquid (IL) with zinc dialkyldithiophosphate (ZDDP) and zinc oxide (ZnO) nanoparticles (NPs) as hybrid additives in a circulation oil for steel–steel contacts at different temperatures. The wear test results indicated that the additions of single additives (IL, ZDDP, and ZnO NPs) could enhance the tribological performance of the circulation oil. Among these additives, the IL exhibited the most effective at the same weight concentration blended into the tested oil. The mixture of IL and ZDDP showed superior friction-reducing and wear-reducing properties compared to the IL + ZnO formulation. The hybrid additive formulation consisting of 0.5 wt% IL, 0.25 wt% ZDDP, and 0.25 wt% ZnO NPs exhibited excellent tribological properties at higher temperatures in the boundary lubrication regime. Analysis using scanning electron microscopy/energy dispersive X-ray reveals that all single additives contribute to the formation of a tribofilm wear mechanism. However, the role of ZnO NPs in the hybrid additive conditions was changed from the most likely tribosintering effect to the most likely nano bearing effect at 100 °C. The interactions among IL, ZDDP, and NPs examined in this study can provide fundamental insights for the development of future lubricants.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of tribological behavior of a circulation oil with ionic liquid and hybrid additives

Ta,

Horng

2023

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…It is well known that ILs can also act as dispersants, improving the temporal stability of the nanolubricants [16]. By combining the required properties of ILs and NPs, improved stability and better efficiency can be reached [17][18][19][20]. These hybrid formulations of NPs and ILs as lubricant additives can exhibit interesting positive antifriction and antiwear synergies [21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effects of Functionalized WS2 and SiO2 Nanoparticles and a Phosphonium Ionic Liquid as Hybrid Additives of Low-Viscosity Lubricants

Liñeira del Río,

Fernandes,

Gonçalves

et al. 2024

Lubricants

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This research shows the antifriction and antiwear synergies between a phosphonium ionic liquid (IL) and f-WS2 and f-SiO2 nanoparticles (NPs) as additives of a base oil with low viscosity (PAO6). Mass concentrations of 0.1 wt% nanoadditives and 1% IL were selected to formulate the nanolubricants. Pure sliding and rolling–sliding friction tests were performed at 120 °C, finding great friction reductions in comparison with the PAO6 base oil, specifically for the double hybrid nanolubricant (PAO6 + 1 wt% IL + 0.1 wt% f-WS2 + 0.1 wt% f-SiO2). Regarding the wear produced, the greatest antiwear behavior was also achieved for the double hybrid nanolubricant (width reduction of 48% and worn area decrease of 84%). Furthermore, by means of Raman microscopy and roughness examination of the worn surfaces, it can be proposed that the lubrication mechanism of doubled hybrid nanolubricants could be supported by the adsorbed tribofilm (IL and f-WS2) as well as the mending effects (f-WS2 and f-SiO2).

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“…However, its boundary lubricating capacity is poor, and it urgently needs high-performance additives to increase the lubrication properties urgently. Ionic liquids (ILs), a potential material in lubricating yield, have attracted more attention as lubricant additives due to the unique structure, great thermostability, high chemical stability, and so on. − Besides, carbon dots (CDs) as a nano carbon material also have tremendous potentials in lubrication area − because of the tiny size, abundant surface groups, and great adsorption ability on the friction interface. − The oil-soluble ionic liquid, ,, CDs , or other nanoparticles as PAO additives exhibit great friction reduction and antiwear properties. In the lubrication application, the dispersion stability between nanoparticles and base oil is a main challenge. , Nevertheless, the existence of surface polar groups will result in poor compatibility between synthesized CDs and PAO, limiting the application of CDs as nonpolar oil additives.…”

Section: Introductionmentioning

confidence: 99%

Ionic Nitrogen-Doped Carbon Dots as Nonpolar Lubricant Additives at Low Effective Addition

Wang,

Che,

et al. 2024

Langmuir

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The poor compatibility with nonpolar lubricant still hinders the application of carbon dots (CDs) in lubrication. In addition, research proves that the existence of ionic structure and active groups on CDs are conducive to their lubricity. In order to obtain the ionic structures and good oil compatibility synchronously, a kind of ionic nitrogen-doped CDs (NCDs) was synthesized via the alkylation of nitrogen in NCDs and anion exchange. The new material could exhibit good tribological performance as poly alpha olefins (PAO4) additives with low addition. Moreover, an ionic liquid, [N44HH][DEHP], with the same anion was chosen as a comparison to investigate the role of NCD cations. The surface analyses demonstrate that NCD cations and phosphate ester anions adsorb on the friction interface to play a synergistic lubrication role during the friction process, which could generate a superior carbon-based tribofilm.

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Ionic Liquid-Nanoparticle-Based Hybrid-Nanolubricant Additives for Potential Enhancement of Tribological Properties of Lubricants and Their Comparative Study with ZDDP

Cited by 25 publications

References 61 publications

Evaluation of tribological behavior of a circulation oil with ionic liquid and hybrid additives

Evaluation of tribological behavior of a circulation oil with ionic liquid and hybrid additives

Synergistic Effects of Functionalized WS2 and SiO2 Nanoparticles and a Phosphonium Ionic Liquid as Hybrid Additives of Low-Viscosity Lubricants

Ionic Nitrogen-Doped Carbon Dots as Nonpolar Lubricant Additives at Low Effective Addition

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