Tribological performance of jatropha oil-based nanofluids for orthogonal cutting process

The increasing awareness and concerns toward the environmental and health issues have risen the attention to shift the petroleum-based metalworking fluids (MWFs) toward the use of renewable and biodegradable energy sources for the production of MWFs. Thus, vegetable-based MWF, especially crude jatro...

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Main Author:	Jamaluddin, Nor Athira
Format:	Thesis
Language:	English English English
Published:	2021
Subjects:	TP315-360 Fuel
Online Access:	http://eprints.uthm.edu.my/971/1/24p%20NOR%20ATHIRA%20BINTI%20JAMALUDDIN.pdf http://eprints.uthm.edu.my/971/2/NOR%20ATHIRA%20BINTI%20JAMALUDDIN%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/971/3/NOR%20ATHIRA%20BINTI%20JAMALUDDIN%20WATERMARK.pdf
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spelling	my-uthm-ep.9712021-08-22T08:06:14Z Tribological performance of jatropha oil-based nanofluids for orthogonal cutting process 2021-01 Jamaluddin, Nor Athira TP315-360 Fuel The increasing awareness and concerns toward the environmental and health issues have risen the attention to shift the petroleum-based metalworking fluids (MWFs) toward the use of renewable and biodegradable energy sources for the production of MWFs. Thus, vegetable-based MWF, especially crude jatropha oil (CJO) is considered as a great potential substitution of the petroleum-based oil. However, the crucial limitation of using CJO is low thermal and oxidation stability that leads to poor lubrication behaviour. Hence, the aim of this study was to develop and evaluate the nanofluid formulations from modified jatropha oil (MJO) as the MWF. The MJOs were formulated from jatropha methyl ester with addition of trimethylolpropane (JME: TMP) at molar ratio 3.5:1 through transesterification process. Subsequently, the MJOs were mixed with hexagonal boron nitride (hBN), graphene and copper oxide (CuO) nanoparticles at various concentrations (i.e. 0.01 to 0.05 wt.%). The performance of MJOs was analysed based on the physicochemical properties, tribological behavior and orthogonal cutting. According to the current findings, thermal-oxidation stability of MJOg3 (MJO+0.05wt.% graphene nanoparticles), MJOh3 (MJO+0.05wt.% hBN nanoparticles) and MJOc3 (MJO+0.05wt.% CuO nanoparticles) were significantly improved by achieving the highest viscosity index among the other studied samples. Contrastingly, MJOh2 (MJO+0.025wt.% hBN nanoparticles), MJOg2 (MJO+0.025wt.% graphene nanoparticles) and MJOc2 (MJO+0.025wt.% CuO nanoparticles) provided the lowest coefficient of friction, friction torque, mean wear scar diameter, surface roughness, volume wear rate and smoothest worn surfaces. For orthogonal cutting process, MJOh2, MJOg2 and MJOc2 offered the lowest cutting temperature, chip thickness and tool-chip contact length. In summary, the MJO with moderate concentration of nanoparticles (MJOh2, MJOg2, MJOc2) provided a superior tribological and machining performance which was a highly potential substitution to the synthetic ester (SE) for the green machining process. 2021-01 Thesis http://eprints.uthm.edu.my/971/ http://eprints.uthm.edu.my/971/1/24p%20NOR%20ATHIRA%20BINTI%20JAMALUDDIN.pdf text en public http://eprints.uthm.edu.my/971/2/NOR%20ATHIRA%20BINTI%20JAMALUDDIN%20COPYRIGHT%20DECLARATION.pdf text en staffonly http://eprints.uthm.edu.my/971/3/NOR%20ATHIRA%20BINTI%20JAMALUDDIN%20WATERMARK.pdf text en validuser mphil masters Universiti Tun Hussein Onn Malaysia Faculty of Mechanical and Manufacturing Engineering
institution	Universiti Tun Hussein Onn Malaysia
collection	UTHM Institutional Repository
language	English English English
topic	TP315-360 Fuel
spellingShingle	TP315-360 Fuel Jamaluddin, Nor Athira Tribological performance of jatropha oil-based nanofluids for orthogonal cutting process
description	The increasing awareness and concerns toward the environmental and health issues have risen the attention to shift the petroleum-based metalworking fluids (MWFs) toward the use of renewable and biodegradable energy sources for the production of MWFs. Thus, vegetable-based MWF, especially crude jatropha oil (CJO) is considered as a great potential substitution of the petroleum-based oil. However, the crucial limitation of using CJO is low thermal and oxidation stability that leads to poor lubrication behaviour. Hence, the aim of this study was to develop and evaluate the nanofluid formulations from modified jatropha oil (MJO) as the MWF. The MJOs were formulated from jatropha methyl ester with addition of trimethylolpropane (JME: TMP) at molar ratio 3.5:1 through transesterification process. Subsequently, the MJOs were mixed with hexagonal boron nitride (hBN), graphene and copper oxide (CuO) nanoparticles at various concentrations (i.e. 0.01 to 0.05 wt.%). The performance of MJOs was analysed based on the physicochemical properties, tribological behavior and orthogonal cutting. According to the current findings, thermal-oxidation stability of MJOg3 (MJO+0.05wt.% graphene nanoparticles), MJOh3 (MJO+0.05wt.% hBN nanoparticles) and MJOc3 (MJO+0.05wt.% CuO nanoparticles) were significantly improved by achieving the highest viscosity index among the other studied samples. Contrastingly, MJOh2 (MJO+0.025wt.% hBN nanoparticles), MJOg2 (MJO+0.025wt.% graphene nanoparticles) and MJOc2 (MJO+0.025wt.% CuO nanoparticles) provided the lowest coefficient of friction, friction torque, mean wear scar diameter, surface roughness, volume wear rate and smoothest worn surfaces. For orthogonal cutting process, MJOh2, MJOg2 and MJOc2 offered the lowest cutting temperature, chip thickness and tool-chip contact length. In summary, the MJO with moderate concentration of nanoparticles (MJOh2, MJOg2, MJOc2) provided a superior tribological and machining performance which was a highly potential substitution to the synthetic ester (SE) for the green machining process.
format	Thesis
qualification_name	Master of Philosophy (M.Phil.)
qualification_level	Master's degree
author	Jamaluddin, Nor Athira
author_facet	Jamaluddin, Nor Athira
author_sort	Jamaluddin, Nor Athira
title	Tribological performance of jatropha oil-based nanofluids for orthogonal cutting process
title_short	Tribological performance of jatropha oil-based nanofluids for orthogonal cutting process
title_full	Tribological performance of jatropha oil-based nanofluids for orthogonal cutting process
title_fullStr	Tribological performance of jatropha oil-based nanofluids for orthogonal cutting process
title_full_unstemmed	Tribological performance of jatropha oil-based nanofluids for orthogonal cutting process
title_sort	tribological performance of jatropha oil-based nanofluids for orthogonal cutting process
granting_institution	Universiti Tun Hussein Onn Malaysia
granting_department	Faculty of Mechanical and Manufacturing Engineering
publishDate	2021
url	http://eprints.uthm.edu.my/971/1/24p%20NOR%20ATHIRA%20BINTI%20JAMALUDDIN.pdf http://eprints.uthm.edu.my/971/2/NOR%20ATHIRA%20BINTI%20JAMALUDDIN%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/971/3/NOR%20ATHIRA%20BINTI%20JAMALUDDIN%20WATERMARK.pdf
_version_	1747830722634186752

Tribological performance of jatropha oil-based nanofluids for orthogonal cutting process

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