Evaluation of the tribological and thermo-physical properties of coconut oil added with MoS 2 nanoparticles at elevated temperatures

Koshy, Chacko Preno; Rajendrakumar, P. K.; Thottackkad, Manu V.

doi:10.1016/j.wear.2014.12.044

Cited by 194 publications

(108 citation statements)

References 38 publications

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“…However, the agglomeration is still persistent for NNP A and B, since it is still possible to see the particulate in the micrographs with optical increased 500x. For [16] found poor dispersion of MoS2 in vegetable oil and paraffinic oil without use of surfactant and they suggested that the verification of nanoparticle dispersion in the oils needs to be carried out to recommend its deployment in long term stationary applications.…”

Section: Iii2 Physical Dispersion Analysismentioning

confidence: 99%

Leverage about synthesis and dispersion with cuo nanoparticle in oil lubricating

Mello¹,

Guedes²,

Alves³

et al. 2016

ITEGAM- Journal of Engineering and Technology for Industrial Applications (ITEGAM-JETIA)

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The challenge for nanotechnology application in automotive lubrication is the difficulty in dispersing the nanoparticles in lubricating oils. Some factors have a direct influence on the dispersion of particles, such as size and shape, which are controlled by the chosen synthesis method. In addition, the use of covers and dispersant agents aid the dispersion of nanoparticles in lubricating oils. In this work studied the effect of different amount of energy given during the synthesis of nanoparticles in microwaves, in order to observe its influence on the dispersion size and shape of nanoparticles. They were covered with oleic acid, as well disperse in toluene, improving nanoparticle dispersion. The dispersion in of nanoparticles in oil was observed by physical characteristic, spectroscopy in the visible ultraviolet (UV/VIS) and micrographs (MO). The results showed that the synthesis with higher amount of energy generated a smaller particle size and better dispersion in oil. However the nanoparticle shape is not influenced by energy amount. The use of Oleic acid and toluene improved the dispersion of the nanoparticles in the lubricant oil as observed in the results of UV/ VIS by biggest interparticle distance.Keywords: Nanoparticles, synthesis energy, dispersion in oil.Alavancagem sobre a síntese e dispersão com nanopartículas de CuO em óleo lubrificante RESUMO O desafio para aplicação de nanotecnologia em lubrificação automóvel é a dificuldade em dispersar as nanopartículas em óleos lubrificantes. Alguns fatores têm uma influência direta sobre a dispersão de partículas, tais como tamanho e forma, que são controladas pelo método escolhido de síntese. Além disso, o uso de tampas e agentes dispersantes auxiliam na dispersão de nanopartículas em óleos lubrificantes. Neste trabalho foi estudado o efeito de diferentes quantidades de energia dada durante a síntese das nanopartículas em micro-ondas, a fim de observar a sua influência sobre o tamanho e a forma da dispersão de nanopartículas. Eles foram cobertas com ácido oleico, assim dispersar em tolueno, melhorando a dispersão de nanopartículas. A dispersão em de nanopartículas em óleo foi observada por característica física, espectroscopia no ultravioleta visível (UV/VIS) e micrografias (MO). Os resultados mostraram que a síntese de com maior quantidade de energia gerada uma dimensão de partícula mais pequena e melhor dispersão em óleo. No entanto, a forma de nanopartículas não é influenciada pela quantidade de energia. A utilização de ácido oleico e tolueno melhorou a dispersão das nanopartículas no óleo lubrificante como observado nos resultados de UV / VIS por maior distância interpartículas.Palavras-Chave: nanopartículas, síntese de energia, dispersão em óleo.

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Section: Iii2 Physical Dispersion Analysismentioning

confidence: 99%

Leverage about synthesis and dispersion with cuo nanoparticle in oil lubricating

Mello¹,

Guedes²,

Alves³

et al. 2016

ITEGAM- Journal of Engineering and Technology for Industrial Applications (ITEGAM-JETIA)

View full text Add to dashboard Cite

show abstract

“…It is reported that the use of lubricants could save 2% of energy during industrial production . In order to improve the tribological properties of lubricating oil further, filling it with different nanomaterials, such as Cu NPs, MoS 2 and GO, is an effective and convenient way. In recent years, more and more layered materials have been used in lubricants, for example, hexagonal boron nitride (H‐BN), MoS 2 , graphite and GO .…”

Section: Introductionmentioning

confidence: 99%

Biomimetic Synthesis of Copper/Polydopamine‐Functionalized Oxygenated Carbon Nitride Composites and Their Application as Lubricants

Min

Jia

et al. 2020

ChemistrySelect

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The wet chemical reduction method was used to modify polydopamine (PDA) functionalized oxygenated carbon nitride (O‐g‐C3N4) nanosheets to prepare in situ growth of Cu nanoparticles (Cu NPs) decorated on nanosheets. The PDA attached to the surface of O‐g‐C3N4 provided a uniformly distributed platform for copper nanoparticles. It also provided rich functional groups and provided good conditions for the dispersion of Cu/PDA/O‐g‐C3N4 in pure oil. Through TEM testing, Cu NPs with a diameter of 5–10 nm were evenly distributed on the PDA/O‐g‐C3N4 nanosheets. Through the sliding test on the steel surface, it was obvious that adding 0.2 wt % Cu/PDA/O‐g‐C3N4 to pure oil had a lowest coefficient of friction. In addition, the wear marks on the surface of Cu/PDA/O‐g‐C3N4 steel discs were studied with an optical microscope and a three‐dimensional profiler and its wear resistance was better than Cu NPs, O‐g‐C3N4 and Cu/O‐g‐C3N4.

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“…Besides, the lubricating properties and load-bearing capacity of the lubricating oil can be improved to be suitable for slashing conditions [5,6]. In recent years, the tribological properties of CuO, MoS 2 Ce-Zr nano-additives in lubrication oil were studied [7] The sizes of nanoparticles used were mostly in the range of 20∼150 nm. The friction reduction and anti-wear behaviors are dependent on the characteristics of nanoparticles such as size, shape and concentration [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Tribological performance of freeze-drying nano-copper particle as additive of paroline oil

Peng

Guo

Han

et al. 2020

Mater. Res. Express

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Monodispersed nano-copper particles were prepared, and the optimized method of preparation procedure was established through orthogonal experiments under four different factors. The experimental results show that the particle size of freeze-dried nano-copper particles can be adjusted by rotational speed, freezing rate, types of active agents and freezing mode, and freezing mode is the most important among all of the four factors. Tribological results of the nano-copper particles from the best optimized procedure can be improved 5%-10% than that of pure paroline oil and the lowest coefficient of friction 0.12 can be obtained for the sample of 0.05 wt%. The lubrication mechanism mostly attributed to the appropriate concentration of copper particles filling the surface pits, which is beneficial for the improvement of the tribological performance.

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Evaluation of the tribological and thermo-physical properties of coconut oil added with MoS 2 nanoparticles at elevated temperatures

Cited by 194 publications

References 38 publications

Leverage about synthesis and dispersion with cuo nanoparticle in oil lubricating

Leverage about synthesis and dispersion with cuo nanoparticle in oil lubricating

Biomimetic Synthesis of Copper/Polydopamine‐Functionalized Oxygenated Carbon Nitride Composites and Their Application as Lubricants

Tribological performance of freeze-drying nano-copper particle as additive of paroline oil

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