Analysis of Tribological and Thermo-Physical Properties of Surfactant-Modified Vegetable Oil-Based CuO Nano-Lubricants at Elevated Temperatures - An Experimental Study

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

doi:10.2474/trol.10.344

Cited by 23 publications

(16 citation statements)

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“…Furthermore, thermal plasma synthesized CuO with an average diameter of 40 nm mixed at 1.5 mass% improved both the friction coefficient and wear [20]. In vegetable oil, thermal plasma synthesized CuO with a diameter of 20-150 nm mixed at 0.3 mass% improved both friction coefficient and wear [21,22], and CuO prepared by an alcothermal method with a diameter of approximately 10 nm mixed at 0.5 mass% did not improve tribological properties [23]. In synthetic oil of poly-α-olefin (PAO), chemically synthesized CuO capped by oleic acid with a diameter of 10-40 nm mixed at 2.0 mass% improved wear under extreme pressure [24] and the friction coefficient [25]; thermal plasma synthesized CuO with a diameter of less than 50 nm mixed at 2.0 mass% improved both friction coefficient and wear [26]; microwave synthesized CuO with an average diameter of 4.3 nm mixed at 0.1 mass% improved both friction coefficient and especially wear [27]; and commercially available CuO with an average diameter of 100 nm mixed at 1.0 mass% improved wear under rolling contact [28].…”

Section: Introductionmentioning

confidence: 99%

Wood-Powder-Template-Based Syntheses and Tribology of Copper Oxide Particles as Lubricating Oil Additives

et al. 2020

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Copper based particles were synthesized by a wood-powder-template-based process. Wood powders mixed with an aqueous cooper salt solution were heated under N 2 gas flow, and then, the mixture of the charcoal powder and copper particles were heated in air to remove charcoal. Finally, oxidized wood-derived copper particles (OWCu) of less than 1 μm were synthesized. Wood powders acted as the template and limited the sizes of the copper particles. In addition, the tribological properties of OWCu in synthetic oil were investigated using a pin-on-plate reciprocating tribometer. Our results revealed that 0.5 mass% OWCu reduced both the friction coefficient (max 45%) and wear volume (max 39%) of SUJ2 lubricated by PAO4. The best reduction effect was obtained for OWCu synthesized at 400°C under N 2 gas flow, which had the smallest average particle size, where the coverage of the OWCu layer on the wear track was the largest. These facts suggest that the particle size reduction of OWCu can increase the coverage and improve the friction coefficient and wear volume reduction effects of the lubricant. Control of the wood-powder-template-based synthesized particles to the optimal size for the roughness of the sliding surface would help achieve better tribological performance.

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Section: Introductionmentioning

confidence: 99%

Wood-Powder-Template-Based Syntheses and Tribology of Copper Oxide Particles as Lubricating Oil Additives

et al. 2020

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“…Koshy et al. 10 reported the effect of surfactant modified CuO nano-particles in CO to improve the tribological properties of base oil. The least wear scar and friction coefficient were observed with 0.1 wt% CuO and CeO 2 nano-additives addition in sunflower oil.…”

Section: Introductionmentioning

confidence: 99%

“…Thottackkad et al 9 examined tribological characteristics of CO based nano-lubricants with different concentration of CuO nano-particles and observed that nano-lubricant with 0.34 wt% CuO nano-particles exhibits least friction coefficient. Koshy et al 10 reported the effect of surfactant modified CuO nano-particles in CO to improve the tribological properties of base oil. The least wear scar and friction coefficient were observed with 0.1 wt% CuO and CeO 2 nano-additives addition in sunflower oil.…”

Section: Introductionmentioning

confidence: 99%

Tribological assessment of vegetable oil based CeO₂/CuO hybrid nano-lubricant

Sajeeb

Rajendrakumar

2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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Vegetable oil based lubricants attract much attention nowadays due to their excellent boundary lubrication performance and biodegradability. Coconut oil is a vegetable oil with excellent lubricating properties which provides low friction coefficient and better oxidation stability. The purpose of this study is to investigate the performance of coconut oil based new hybrid CeO2/CuO nano-lubricant with various ratios of CeO2/CuO viz. 25/75, 50/50, and 75/25 at different concentrations (0.1, 0.25, 0.5, and 1.0 wt%). The rheological, thermal, thermo-gravimetric, and tribological evaluations were conducted for hybrid nano-lubricants and the results were compared with those of base oil (coconut oil) and nano-lubricants containing CeO2 and CuO nano-particles individually. A reduction of 15.7% in average friction coefficient and 23.4% in wear scar diameter was observed with the use of 0.25 wt% CeO2/CuO: 50/50 hybrid. Oil degradation studies and worn surface analyses after engine test were also done. The results showed that the surface enhancement is evidenced with the use of hybrid nano-lubricant.

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“…Many studies reported that lubricants that used additive effectively decrease the wear and friction caused by high pressures and temperatures [13][14][15][16][17]. However, the reduction depends on various factors, including the compatibility with the base lubricant.…”

Section: Introductionmentioning

confidence: 99%

Application of Silica–Coated Magnetite on a Steel Plate and its Frictional and Thermal Effect

Dayana

Tetuko

Sembiring

et al. 2020

Period. Polytech. Mech. Eng.

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The magnetite (Fe3O4) particles that have been coated using tetraethyl orthosilicate (TEOS) as silica precursors were used as the additive in the lubricant. The effects of silica-coated magnetite additive on the thermal properties of ferro-lubricant and reducing the friction on a steel plate have been investigated. The characterizations were conducted at both conditions: with and without the addition of Fe3O4 particles. The characterization using TEM proposed that the average particle size of the silica-coated magnetite particles is 150 nm. The TGA/DSC curves of the silica-coated magnetite particles suggested a gradual weight loss obtained as the temperature increased. The endothermic peak was obtained at ~37 and 50 °C. The silica-coated magnetite particles’ additive increases both the density and viscosity of 0.84 g/cm3 and 134.29 cSt. The silica-coated magnetite particles additive in the lubricant enhances the thermal conductivity and specific heat of 0.151 W/m.K and 1600 J/kg.K. Ferro-lubricant reduces the friction coefficient up to 0.02 (static) and 0.005 (dynamic). The wear resistance of the plate could be improved as analyzed using an optical microscope. These results demonstrate a promising application of the silica-coated magnetite particles as an additive in the lubricant. Therefore improving wear resistance and cooling during the friction process.

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Analysis of Tribological and Thermo-Physical Properties of Surfactant-Modified Vegetable Oil-Based CuO Nano-Lubricants at Elevated Temperatures - An Experimental Study

Cited by 23 publications

References 15 publications

Wood-Powder-Template-Based Syntheses and Tribology of Copper Oxide Particles as Lubricating Oil Additives

Wood-Powder-Template-Based Syntheses and Tribology of Copper Oxide Particles as Lubricating Oil Additives

Tribological assessment of vegetable oil based CeO₂/CuO hybrid nano-lubricant

Application of Silica–Coated Magnetite on a Steel Plate and its Frictional and Thermal Effect

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Analysis of Tribological and Thermo-Physical Properties of Surfactant-Modified Vegetable Oil-Based CuO Nano-Lubricants at Elevated Temperatures - An Experimental Study

Cited by 23 publications

References 15 publications

Wood-Powder-Template-Based Syntheses and Tribology of Copper Oxide Particles as Lubricating Oil Additives

Wood-Powder-Template-Based Syntheses and Tribology of Copper Oxide Particles as Lubricating Oil Additives

Tribological assessment of vegetable oil based CeO2/CuO hybrid nano-lubricant

Application of Silica–Coated Magnetite on a Steel Plate and its Frictional and Thermal Effect

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Tribological assessment of vegetable oil based CeO₂/CuO hybrid nano-lubricant