Dispersion stability of nano additives in lubricating oils – an overview of mechanisms, theories and methodologies

Ashraf, Amir; Shafi, Wani Khalid; Haq, Mir Irfan Ul; Raina, Ankush

doi:10.1080/17515831.2021.1981720

Cited by 12 publications

(3 citation statements)

References 103 publications

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“…Using dispersant compounds together with NPs is considered an effective approach to improve the dispersion stability of NPs. 61,63,68 However, the presence of dispersant in the hybrid additives containing IL and ZnO NPs may hamper or assist synergistic effect between them, affecting the physicochemical properties and tribological performance of the hybrid lubricant. For example, Li et al 69 observed that the reaction of polyisobutylene succinimide dispersant with a protic IL resulting in a decrease in the IL ability to form a protective film.…”

Section: Resultsmentioning

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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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%

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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“…The added substances in the engine oil can improve or reduce the properties of the base oil. The not entirely settled by the attributes of the nanoparticles, like shape, size, and volume portion [1]. Numerous analysts announced superior consistency changes in nanoparticle-functionalized engine oil.…”

Section: Introductionmentioning

confidence: 99%

Thermal Properties of Engine Oils through the Integration of Graphene Nanoparticles: A Greener Approach for Sustainable Mechanical Systems

Kadirgama,

Lee,

Ramasamy

et al. 2024

E3S Web of Conf.

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Tribology is a high demand mechanical system with friction and wear. Mechanical systems lose efficiency as a result. One answer for this issue is to utilize an oil that can limit contact and wear, bringing about improved effectiveness. The advancement of effective lubricating added substances for tribological properties improvement and improved thermal conductivity has gotten huge modern and scholarly consideration. By and large, nano-sized particles scattered in lubricants, referred to as nano-based lubricant, are utilized in mechanical structures to lessen heat and forces of frictions. Moreover, new guidelines will empower the utilization of greener lubrication advancements in oils. To resolve this issue, lubricants should satisfy guidelines while able to give exceptional oil characteristics. As another green material, this research will investigate the dissolving of Graphene nanoparticles in lubricants. The objective of this study is to perceive what Graphene added 10W40 motor oil means for the thermal properties and tribological characteristics. Graphene, which was added to 10W40 lubricant, was used to study the best design. Graphene nanoparticles were distributed in baseline engine oil in a two-step process. In the preparation of Graphene-based motor oil with a low volume mixture in the scope of 0.01% to 0.07% was used. Thermal conductivity and viscosity are estimated for all volume mixtures. Testing uncovered that Graphene added 10W40 motor oil were steady all through the review, with very little deposits in the following 30 days. The thermal conductivity of Graphene in SAE 40 motor oil expanded as the volume mixture is added.

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“…To improve the performance of lubricating oils, lubricant additives can be used as an effective and reasonable means . Recently, nanomaterials have been extensively studied as lubricant additives with a positive effect on lubricants. , Various nanomaterials, including graphene, MoS 2 , covalent organic frameworks, and black phosphorus, have been successfully implemented as additives in lubricating oils, reducing energy consumption and extending service life …”

Section: Introductionmentioning

confidence: 99%

Thiadiazole Dimer-Functionalized Liquid Metal Nanoparticles for Anti-Corrosion and Friction Reduction

Wang

Xie

Guo

et al. 2023

ACS Appl. Nano Mater.

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Thiadiazole compounds and their derivatives have good carrying capacity and lubricating properties. Herein, polydopamine can be in situ self-assembled onto gallium-based liquid metal (GLM) nanoparticles via ultrasound treatment of bulk GLM nanoparticles in dopamine-containing Tris aqueous solution followed by covalent bonding with a thiadiazole dimer (DMCT) through Michael addition reactions. The as-prepared thiadiazole dimer-functionalized liquid metal (GLM-DMCT) nanoparticles, with an average particle size of 380 nm, can be used as nanoadditives in the base oil (500SN). The tribological properties of GLM-DMCT as additives were evaluated under various loads, temperatures, and frequencies, and the results showed that GLM-DMCT additives have improved anti-friction and anti-wear performances of 500SN. The coefficient of friction can be reduced to 0.092 from 0.147 after adding 2 wt % GLM-DMCT, the wear volume reduces by 89.7%, and the load-carrying capacity is increased from 150 to 1050 N. The improved tribological performance is credited to the formation of a stable, protective layer on the friction pair via the complex tribo-chemical reaction of Ga, In, and S elements of GLM-DMCT. Furthermore, the as-prepared GLM-DMCT exhibits good anti-corrosion performance, which is attributed to the breaking of the disulfide bond of DMCT, releasing the corrosion inhibitor DMTD during the corrosion process.

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Dispersion stability of nano additives in lubricating oils – an overview of mechanisms, theories and methodologies

Cited by 12 publications

References 103 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

Thermal Properties of Engine Oils through the Integration of Graphene Nanoparticles: A Greener Approach for Sustainable Mechanical Systems

Thiadiazole Dimer-Functionalized Liquid Metal Nanoparticles for Anti-Corrosion and Friction Reduction

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