Tribological analyses of modified jatropha oil with hBN and graphene nanoparticles as an alternative lubricant for machining process

Jamaluddin, Nor Athira and Talib, Norfazillah and Abdul Sani, Amiril Sahab (2020) Tribological analyses of modified jatropha oil with hBN and graphene nanoparticles as an alternative lubricant for machining process. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 76 (2). pp. 1-10. ISSN 2289-7879

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Official URL: https://doi.org/10.37934/arfmts.76.2.110

Abstract

The increase of health and environmental consciousness has motivated the effort of technology improvement on lubrication by finding and exploring another potential alternative to replace mineral-based metalworking fluids. Due to this concern, vegetable-based oils have been recognised as an ideal lubricating base oil in machining due to low toxicity, biodegradable, and renewable energy sources. Moreover, nanofluids have attracted enormous attention in the field of lubrication due to excellent physical and chemical properties that can enhance tribological characterisation. The objective of the current work is to develop a new formulation of nanofluids in modified jatropha oil (MJO) by adding hexagonal boron nitride (hBN) and graphene nanoparticle additives at the lowest concentration (0.01, 0.025. and 0.05 wt. %). The physicochemical tests in terms of kinematic viscosity and viscosity index were conducted and compared with synthetic ester (SE). Tribology testing was conducted through four-ball test to determine the coefficient of friction, mean wear scar diameter, and friction torque. The result shows a significant improvement of MJO samples by adding nanoparticle additives compared to the SE. MJOg2 (MJO + 0.025 wt. % of graphene) exhibited excellent tribological behaviour by providing the lowest coefficient of friction and friction torque. Meanwhile, MJOh1 (MJO + 0.01 wt. % of hBN) provided with a smaller mean wear scar diameter among other lubricant samples. Conclusively, the addition of nanoparticle additives significantly enhanced the tribological characteristics and is highly suitable as a substitute for SE.

Item Type:	Article
Uncontrolled Keywords:	Modified jatropha oil; Nanofluid; Hexagonal Boron Nitride; Graphene; Tribology; Sustainable Metalworking Fluid
Subjects:	T Technology > TP Chemical technology
Divisions:	Faculty of Mechanical and Manufacturing Engineering > Department of Manufacturing Engineering
Depositing User:	Miss Nur Rasyidah Rosli
Date Deposited:	30 Jan 2022 08:39
Last Modified:	30 Jan 2022 08:39
URI:	http://eprints.uthm.edu.my/id/eprint/6405

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