Thermophysical and wear properties of eco-friendly nano lubricants

Karthikeyan, K.M.B.; Vijayanand, J.; Arun, K.; Rao, V. Seshagiri

doi:10.1016/j.matpr.2020.07.128

Cited by 23 publications

(10 citation statements)

References 14 publications

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“…In this work, the authors suggested that the problem was due to the agglomeration of the nanoparticles in oil with the increasing of the additive concentration. The study of Karthikeyan et al (2020) [ 15 ] on the thermophysical and wear properties of eco-friendly nano lubricants, also revealed an increase of 12.5% in friction when 0.7 wt.% MoS 2 nanoparticles were employed as additives in castor oil. In the present study, an additional comparison was performed with one of the most employed synthetic anti-wear additives to castor oil.…”

Section: Resultsmentioning

confidence: 99%

“…Similarly, Singh, et al (2020) [ 14 ] investigated the friction and wear properties of castor oil with TiO 2 ; under the tested conditions, they principally found notable reductions in friction and wear with a concentration of 0.2 v% TiO 2 nanoparticles. Karthikeyan et al (2021) [ 15 ] analyzed the addition of molybdenum disulfide (MoS 2 ) nanoparticles to castor oil without adding surfactants or property modifiers. They found that the tribological performance of nano lubricant was comparable to that of mineral oil, SAE20W40 multigrade engine oil.…”

Section: Introductionmentioning

confidence: 99%

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On the Tribological and Oxidation Study of Xanthophylls as Natural Additives in Castor Oil for Green Lubrication

et al. 2021

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The present study focuses on an introductory analysis of the use of three xanthophylls as additives for green lubricant applications. For this purpose, the additives were characterized by FTIR and 1H-NMR techniques, and the bio-lubricants were described by their physical properties. The effect of the natural compounds on the friction and wear properties of bio-lubricants were evaluated by sliding friction tests under boundary conditions, as confirmed by an analysis of the lubricating film thickness. The antioxidant capacity was analyzed by FTIR spectroscopy. It was observed better wear protection in castor oil with xanthophylls than without these additives. The wear rate was reduced up to 50% compared with neat oil. Lesser beneficial effects were appreciated in friction coefficient since it was increased 25%. The best contribution was observed with astaxanthin as an additive. In addition, a significant improvement in the oxidation of castor oil, complemented with this additive, was exhibited by FTIR analysis. It was found that xanthophylls could be employed as additives for totally biodegradable lubricant applications since they have better tribological and antioxidant behavior than current additives.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

On the Tribological and Oxidation Study of Xanthophylls as Natural Additives in Castor Oil for Green Lubrication

et al. 2021

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“…It is concluded that the base oil added with MoS 2 has better thermal conductivity, better heat dissipation than that of pure base oil, and is more conducive to cooling the drill bit, indicating that oil‐based dispersion with MoS 2 thermal conductivity has been greatly improved 22 . When MoS 2 was added to castor and olive oil, the thermal conductivity of castor oil was increased by 27% and 33% when the mass fraction of MoS 2 was 0.5% and 0.7%, respectively 23 …”

Section: Introductionmentioning

confidence: 99%

Preparation of MoS₂/diesel dispersion nanofluid and its application in diluent blending‐viscosity reduction technology for heavy oil production

Ren

Jiang

et al. 2023

Asia-Pacific J Chem Eng

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Diluent blending‐viscosity reduction technology is an important method for heavy oil exploitation. For conventional diluent blending‐viscosity reduction technology, many disadvantages such as large amount of light oil and poor thermal conductivity limit its development in the oil field. In this paper, nano‐molybdenum disulfide (MoS2) with excellent thermal conductivity was added into diesel to improve the thermal conductivity of light oil, and the stability of MoS2/diesel dispersion was improved by adding the dispersant. The effect of diluent blending‐viscosity reduction technology was evaluated using MoS2/diesel dispersion as light oil system. The results showed that the dispersion effect of ultrasonic cell crusher was better than that of a homogenizer and ultrasonic cleaner; the stability of MoS2/diesel dispersions decrease with the increase of the dosage of nanoparticles and with temperature. A certain degree of mechanical oscillation can improve the stability of MoS2/diesel dispersions. Compared with Span‐80 and N,N‐dimethylformamide, the stability was significantly improved when the concentration of succinimide ashless dispersant was 1%. The evaluation of diluent blending‐viscosity reduction technology experiment shows that adding an appropriate dosage of MoS2 can reduce the amount of light oil and improve the viscosity reduction effect at low temperature. When the blending ratio was 5% at 50°C, the viscosity reduction rate of MoS2/diesel dispersion relative to diesel increased by 44.9%. Therefore, it is of great significance to reduce the energy consumption and increase the production of heavy oil by diluent blending‐viscosity reduction technology based on oil‐based nanofluids with high thermal conductivity.

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“…The current review study is considered a step towards developing a novel class of lubricant additives, which are considered less harmful to humans and the environment, besides their substantial performance [36,37]. Moreover, it offers a systematic outline of the research outcomes introduced in previously declared data through the last decade, regarding engine-based nanolubricants.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Preparation and Testing Methods of Engine-Based Nanolubricants: A State-of-the-Art Review

et al. 2021

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Reducing power losses in engines is considered a key parameter of their efficiency improvement. Nanotechnology, as an interface technology, is considered one of the most promising strategies for this purpose. As a consumable liquid, researchers have studied nanolubricants through the last decade as potential engine oil. Nanolubricants were shown to cause a considerable reduction in the engine frictional and thermal losses, and fuel consumption as well. Despite that, numerous drawbacks regarding the quality of the processed nanolubricants were discerned. This includes the dispersion stability of these fluids and the lack of actual engine experiments. It has been shown that the selection criteria of nanoparticles to be used as lubricant additives for internal combustion engines is considered a complex process. Many factors have to be considered to investigate and follow up with their characteristics. The selection methodology includes tribological and rheological behaviours, thermal stability, dispersion stability, as well as engine performance. Through the last decade, studies on nanolubricants related to internal combustion engines focused only on one to three of these factors, with little concern towards the other factors that would have a considerable effect on their final behaviour. In this review study, recent works concerning nanolubricants are discussed and summarized. A complete image of the designing parameters for this approach is presented, to afford an effective product as engine lubricant.

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Thermophysical and wear properties of eco-friendly nano lubricants

Cited by 23 publications

References 14 publications

On the Tribological and Oxidation Study of Xanthophylls as Natural Additives in Castor Oil for Green Lubrication

On the Tribological and Oxidation Study of Xanthophylls as Natural Additives in Castor Oil for Green Lubrication

Preparation of MoS₂/diesel dispersion nanofluid and its application in diluent blending‐viscosity reduction technology for heavy oil production

Recent Advances in Preparation and Testing Methods of Engine-Based Nanolubricants: A State-of-the-Art Review

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Thermophysical and wear properties of eco-friendly nano lubricants

Cited by 23 publications

References 14 publications

On the Tribological and Oxidation Study of Xanthophylls as Natural Additives in Castor Oil for Green Lubrication

On the Tribological and Oxidation Study of Xanthophylls as Natural Additives in Castor Oil for Green Lubrication

Preparation of MoS2/diesel dispersion nanofluid and its application in diluent blending‐viscosity reduction technology for heavy oil production

Recent Advances in Preparation and Testing Methods of Engine-Based Nanolubricants: A State-of-the-Art Review

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Preparation of MoS₂/diesel dispersion nanofluid and its application in diluent blending‐viscosity reduction technology for heavy oil production