Tribological properties of protic ionic liquid and functionalized copper oxide nanoparticles as additives to base oil

Taaber, Triinu; Enok, A. E.; Joost, Urmas; Oras, Sven; Järvekülg, Martin; Lõhmus, Rünno; Mäeorg, Uno; Saal, Kristjan

doi:10.5755/j01.mech.21.2.11723

Cited by 8 publications

(3 citation statements)

References 19 publications

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“…Therefore, the nanomaterial surface functionalization becomes necessary to their lubrication performance. The use of an oil-soluble PIL with long-alkyl-chain to incorporate the copper oxide nanoparticles as additives to a base oil PAO was firstly reported in [84]. In this study, the PIL was employed to improve the dispersion of the copper oxide NPs, where the hybrid PIL-NPs additives exhibited an enhanced oil-load capacity and a better anti-wear performance compared to that just using copper nanoparticles as additives.…”

Section: Ionic Liquids and Nanoscale Additivesmentioning

confidence: 99%

Ionic Liquids as High-Performance Lubricants and Lubricant Additives

Guo¹,

Iglesias²

2021

Ionic Liquids - Thermophysical Properties and Applications

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Taking into account the environmental awareness and ever-growing restrictive regulations over contamination, the study of new lubricants or lubricant additives with high performance and low toxicity over the traditional lubes to reduce the negative impact on the environment is needed. In this chapter, the current literature on the use of ionic liquids, particularly protic ionic liquids, as high-performance lubricants and lubricant additives to different types of base lubricants are reviewed and described. The relation between ionic liquids structures and their physicochemical properties, such as viscosity, thermal stability, corrosion behavior, biodegradability, and toxicity, is elaborated. Friction reduction and wear protection mechanisms of the ionic liquids are discussed with relation to their molecular structures and physicochemical properties.

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Section: Ionic Liquids and Nanoscale Additivesmentioning

confidence: 99%

Ionic Liquids as High-Performance Lubricants and Lubricant Additives

Guo¹,

Iglesias²

2021

Ionic Liquids - Thermophysical Properties and Applications

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“…Most of these studies reported that the addition of nanoparticles to base oils enhanced the tribological performance [10][11][12][13]. Additionally, the use of functionalized NPs not only improved the tribological properties but also achieved good dispersion stability in [14,15]. Several lubrication mechanisms of nanoparticles that enhance the tribological performance have been proposed [16], including the rolling effect [17,18], mending effect [19,20], protective film formation [12,[21][22][23], and polishing effect [24].…”

Section: Introductionmentioning

confidence: 99%

Tribological Behaviour of Graphene Nanoplatelets as Additive in Pongamia Oil

et al. 2021

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This study investigated the tribological behaviour of Pongamia oil (PO) and 15W–40 mineral engine oil (MO) with and without the addition of graphene nanoplatelets (GNPs). The friction and wear characteristics were evaluated in four-ball anti-wear tests according to the ASTM D4172 standard. The morphology of worn surfaces and the lubrication mechanism of GNPs were investigated via SEM and EDS. This study also focuses on the tribological effect of GNP concentration at various concentrations. The addition of 0.05 wt % GNPs in PO and MO exhibits the lowest friction and wear with 17.5% and 12.24% friction reduction, respectively, and 11.96% and 5.14% wear reduction, respectively. Through SEM and EDS surface analysis, the surface enhancement on the worn surface by the polishing effect of GNPs was confirmed. The deposition of GNPs on the friction surface and the formation of a protective film prevent the interacting surfaces from rubbing, resulting in friction and wear reduction.

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“…Consequently, the applications of these materials are unlimited and significantly remarkable in human life and in industries. Each nanomaterial with its distinct properties independently finds its way into practical applications such as: drug delivery [15], waste treatment [16], lubricant and surfactant production [17], electrical and sensor devices [18,19], as well as membrane fuel cells [20]. Noble metal NPs have been widely studied in the past few decades because of their applications in various areas including catalysis, gas and biological sensors, drug delivery, and antimicrobial agents.…”

Section: Introductionmentioning

confidence: 99%

Noble Metal Nanoparticles Prepared by Metal Sputtering into Glycerol and their Grafting to Polymer Surface

Siegel¹,

Řezníčková²,

Slepička³

et al. 2015

Nanoparticles Technology

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This chapter summarizes the basic information about elementary characteristics and technology of preparation of noble metal nanoparticles. The introduction gives some basic information on the history of development in this area, especially in terms of dimensionality of metal nanostructures and their possible applications.The first subsection is devoted to the preparation and characterization of "u, "g, Pt, and Pd nanoparticles NPs , which were synthesized by direct metal sputtering in liquid propane-, , ,-triole glycerol . This method provides an interesting alternative to time-consuming, wetbased chemical synthesis techniques. Moreover, the suggested technique allows targeted variation of metal nanoparticle size, which is demonstrated in detail in case of "uNPs by variation of capturing media temperature. Nanoparticle size and shape were studied by transmission electron microscopy and dynamic light scattering. Optical properties of nanoparticle solution were determined by measuring its UV-Vis spectra. Concentration of metal nanoparticles in prepared solutions was determined by atomic absorption spectroscopy. "ntibacterial properties were tested against two common pollutants Escherichia coli, a Gram-negative bacteria, and Staphylococcus epidermidis, a Gram-positive bacteria . In the presence of "g nanoparticles, the growth of E. coli and S. epidermidis was completely inhibited after h. "ny growth inhibition of E. coli was observed neither in the presence of smaller -nm, "uNP -nor bigger -nm, "uNP -"uNPs during the whole examination period. "uNP -, but not "uNP -, was able to inhibit the growth of. S epidermidis. We also observed significant difference in biological activities of Pt and PdNPs. More specifically, PdNPs exhibited considerable inhibitory potential against both E. coli and S. epidermidis, which was in contrast to ineffective PtNPs. Our results indicate that "g, Pd, and partially "uNPs have high potential to combat both Gram-positive and Gram-negative bacterial strains.The second subsection describes the effort to anchor metal nanoparticles onto polyethyleneterephthalate PET carrier. Two different procedures of grafting of polymeric carrier, activated by plasma treatment, with "u and "gNPs are described. In the first procedure, the PET foil was grafted with biphenyl-, -dithiol "PD and subsequently with "u and "gNPs. In the second one, the PET foil was grafted with "u and "gNPs previously coated by the same "PD. X-ray photoelectron spectrosco-© 2015 The Author(s). Licensee InTech. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.py, Fourier transform infrared spectroscopy, and electrokinetic analysis were used for characterization of the polymer surface at different modification steps. "u and "gNPs were characterized by UV-Vis spectroscopy. In case of both types of nanoparticles, the first ...

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Tribological properties of protic ionic liquid and functionalized copper oxide nanoparticles as additives to base oil

Cited by 8 publications

References 19 publications

Ionic Liquids as High-Performance Lubricants and Lubricant Additives

Ionic Liquids as High-Performance Lubricants and Lubricant Additives

Tribological Behaviour of Graphene Nanoplatelets as Additive in Pongamia Oil

Noble Metal Nanoparticles Prepared by Metal Sputtering into Glycerol and their Grafting to Polymer Surface

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