Improved tribological behavior of lubricating oil dispersed with hybrid nanoparticles of functionalized carbon spheres and graphene nano platelets

Panickar, Radhika; Sobhan, C. B.; Chakravorti, S.

doi:10.1016/j.apsusc.2020.148402

Cited by 53 publications

(15 citation statements)

References 51 publications

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“…Nano additives have the potential to increase machine lifespan, reduce friction and wear, and thus improve the environment and reduce energy loss (Singh et al, 2020). The mechanisms of nano additives between contacting surfaces include rolling, mending, and polishing effects, as well as the formation of a protective film (Rapoport et al, 2002;Ali et al, 2018Ali et al, , 2019Shafi et al, 2018;Kotia et al, 2020;Radhika et al, 2021). Figure 5 depicts the mechanism by which nano additives work.…”

Section: Engine Oilmentioning

confidence: 99%

Prospects of Plant-Based Trimethylolpropane Esters in the Biolubricant Formulation for Various Applications: A Review

et al. 2022

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Biodegradable lubricants from renewable feedstocks have been successfully developed to meet the demands of new machines with stringent requirements of the global standards, which address sustainability and environmental policy. Trimethylolpropane ester (TMPE) has been extensively evaluated as a biolubricant base stock and occasionally used as an additive, due to their low toxicity and excellent biodegradability. The formulation of high-performance TMPE-based lubricants involves addition of surface additives, multifunctional additives, and solid nano particles. This review focuses on the development of plant-based TMPE formulation for various applications, namely food-grade lubricant, engine oil, drilling fluid, insulating fluid, metal working fluid, hydraulic and heat transfer fluids. Even though plant-based TMPE lubricants have huge advantages over mineral oils, they have other challenging issues such as limited load-bearing capacity, hygroscopic properties, and high risk of toxic emission owing to additives selection. The details on the performance characteristics of TMPE as base stocks and additives are discussed, including the current prospects and challenges in the respective areas. This review concludes with a brief discussion on suggestions and recommendations for future advancement in the usage of TMPE and the remaining issues that must be overcome to allow for its full potential to be realized.

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Section: Engine Oilmentioning

confidence: 99%

Prospects of Plant-Based Trimethylolpropane Esters in the Biolubricant Formulation for Various Applications: A Review

et al. 2022

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“…Compared with the two modification methods, the sequential modification of nitric acid and oleic acid can better improve the agglomeration of soot and reduced the disorder degree. 14 Figure 4 is the XRD comparison chart of the three soot samples. CS, CSN and CSNO all have two diffraction peaks (002 crystal plane and 101 crystal plane), comparing their peak intensities and peak shapes, which can preliminarily judge the difference in the degree of graphitization of the three types of soot.…”

Section: Characterisation Analysismentioning

confidence: 99%

“…The mean particle size of CSNO decreases by 5.98% compared with CS.According to the results of SEM and HRTEM, the disorder degree can be reduced and the agglomeration state can be improved by modifying CS with nitric acid or nitric acid and oleic acid orderly. Compared with the two modification methods, the sequential modification of nitric acid and oleic acid can better improve the agglomeration of soot and reduced the disorder degree 14. Figure4is the XRD comparison chart of the three soot samples.…”

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confidence: 99%

Synergistic effect on the tribological characteristics for coal‐to‐liquids soot modified by nitric acid and oleic acid

Wang

Liu

Qin

2022

Lubrication Science

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A self-made soot capture device was applied to burn coal-to-liquids and collect its soot (CS), and then modified the CS with nitric acid or nitric acid and oleic acid to obtain nitric acid modified CS (CSN) or nitric acid and oleic acid modified CS (CSNO). The influence of CS, CSN and CSNO on the lubrication performance of 10 # white oil (WO) was investigated on a four-ball tester. The structural difference, surface topography, element composition and tribological mechanism of the three types soot were analysed by Fourier transform infrared spectrometer, X-ray photoelectron spectroscopy, scanning electron microscope, high resolution transmission electron microscope, and so on. From the obtained results, after further modification with oleic acid, the solubility of oil is significantly improved. Compared with 10 # WO, the average friction coefficient and average wear scar diameter of CS, CSN and CSNO are all reduced.Among them, CSNO has the best anti-friction and anti-wear effect. CSNO is expected to be used as carbon lubricating material from coal-to-liquids soot.

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“…The efficiency and performance of lubricants and greases can be improved by dispersing a small amount of nano and particulate additives in mass percentages. 1 However, with the rapid development of industry, the moving parts of mechanical equipment have been facing more severe challenges in recent years. For example, for wind turbines installed in areas with abundant wind resources, the variable pitch bearings will cause fretting wear 2 due to component vibration in both static and operating conditions, or electrical corrosion of wind turbine bearings caused by shaft current may occur.…”

Section: Introductionmentioning

confidence: 99%

Study on conductivity and tribological properties of polyaniline/molybdenum disulfide composites in lithium complex grease

Feng

Xia

et al. 2022

Lubrication Science

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Polyaniline/molybdenum disulfide (PANI/MoS 2 ) composites doped with hydrochloric acid were synthesised by in situ polymerisation and characterised by Fourier transform infrared spectrometer, thermogravimetric analysis and scanning electron microscope (SEM). The tribological properties of PANI/MoS 2 as composite lithium grease additive were investigated by MFT-R4000 currentcarrying friction and wear tester. SEM observed the surface morphologies of the wear scars, and energy dispersive spectroscopy and X-ray photoelectron spectroscopy analysed the element distribution and chemical state. The results show that PANI/MoS 2 composites have better tribological and electrical properties than PANI and MoS 2 additives alone and in the same proportion. Therefore, it can be concluded that MoS 2 and synergism of polyaniline modifier.

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Improved tribological behavior of lubricating oil dispersed with hybrid nanoparticles of functionalized carbon spheres and graphene nano platelets

Cited by 53 publications

References 51 publications

Prospects of Plant-Based Trimethylolpropane Esters in the Biolubricant Formulation for Various Applications: A Review

Prospects of Plant-Based Trimethylolpropane Esters in the Biolubricant Formulation for Various Applications: A Review

Synergistic effect on the tribological characteristics for coal‐to‐liquids soot modified by nitric acid and oleic acid

Study on conductivity and tribological properties of polyaniline/molybdenum disulfide composites in lithium complex grease

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