Performance evaluation of biodegradable metalworking fluids for machining process

The widely use of metalworking fluids (MWFs) petroleum-based in the industry have a negative impact to the environment and human. Thus, various initiatives have been undertaken to develop bio-based MWFs especially from crude jatropha oil (CJO). However, the main drawback of CJO is that it has low th...

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Main Author:	Talib, Norfazillah
Format:	Thesis
Language:	English English English
Published:	2017
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://eprints.uthm.edu.my/353/1/24p%20NORFAZILLAH%20TALIB.pdf http://eprints.uthm.edu.my/353/2/NORFAZILLAH%20TALIB%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/353/3/NORFAZILLAH%20TALIB%20WATERMARK.pdf
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spelling	my-uthm-ep.3532021-07-25T00:57:49Z Performance evaluation of biodegradable metalworking fluids for machining process 2017-11 Talib, Norfazillah TJ Mechanical engineering and machinery The widely use of metalworking fluids (MWFs) petroleum-based in the industry have a negative impact to the environment and human. Thus, various initiatives have been undertaken to develop bio-based MWFs especially from crude jatropha oil (CJO). However, the main drawback of CJO is that it has low thermal-oxidative stability. Therefore, the objective of this study is to develop a new formulation of CJO-based MWFs. The newly developed modified jatropha oils (MJOs) were formulated using transesterification process at various molar ratios of jatropha methyl ester to trimethylolpropane (JME:TMP) denoted by MJO1 (3.1:1), MJO3 (3.3:1) and MJO5 (3.5:1). Later, the MJOs were blended with hexagonal boron nitride (hBN) particles at various concentrations (0.05 to 0.5wt.%). MJOs with and without hBN particles were analysed based on the physicochemical properties, tribology behaviour test, orthogonal cutting and turning proses. From the results, MJO5 showed an improvement at thermal (high viscosity index) and oxidative stability (lubricant storage). MJO5c (MJO5+0.5wt.% of hBN particles) showed the optimum physicochemical properties. In the contrary, MJO5a (MJO5+0.05wt.% of hBN particles) exhibited excellent tribological behaviour as reduction of friction and wear, with high tapping torque efficiency. In the orthogonal cutting process, MJO5a recorded the lowest machining force and temperature, thus contributed to the formation of thinner chips, small tool-chip contact length and reduction of the specific energy. MJO5a produced an excellent result in the machinability test by reducing the cutting force, cutting temperature and surface roughness stimulated longer tool life and less tool wear. In conclusion, the MJO5a has a potential impact on the lubricant market as a sustainable MWFs for the machining processes. 2017-11 Thesis http://eprints.uthm.edu.my/353/ http://eprints.uthm.edu.my/353/1/24p%20NORFAZILLAH%20TALIB.pdf text en public http://eprints.uthm.edu.my/353/2/NORFAZILLAH%20TALIB%20COPYRIGHT%20DECLARATION.pdf text en staffonly http://eprints.uthm.edu.my/353/3/NORFAZILLAH%20TALIB%20WATERMARK.pdf text en validuser phd doctoral Universiti Tun Hussein Onn Malaysia Fakulti Kejuruteraan Mekanikal dan Pembuatan
institution	Universiti Tun Hussein Onn Malaysia
collection	UTHM Institutional Repository
language	English English English
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Talib, Norfazillah Performance evaluation of biodegradable metalworking fluids for machining process
description	The widely use of metalworking fluids (MWFs) petroleum-based in the industry have a negative impact to the environment and human. Thus, various initiatives have been undertaken to develop bio-based MWFs especially from crude jatropha oil (CJO). However, the main drawback of CJO is that it has low thermal-oxidative stability. Therefore, the objective of this study is to develop a new formulation of CJO-based MWFs. The newly developed modified jatropha oils (MJOs) were formulated using transesterification process at various molar ratios of jatropha methyl ester to trimethylolpropane (JME:TMP) denoted by MJO1 (3.1:1), MJO3 (3.3:1) and MJO5 (3.5:1). Later, the MJOs were blended with hexagonal boron nitride (hBN) particles at various concentrations (0.05 to 0.5wt.%). MJOs with and without hBN particles were analysed based on the physicochemical properties, tribology behaviour test, orthogonal cutting and turning proses. From the results, MJO5 showed an improvement at thermal (high viscosity index) and oxidative stability (lubricant storage). MJO5c (MJO5+0.5wt.% of hBN particles) showed the optimum physicochemical properties. In the contrary, MJO5a (MJO5+0.05wt.% of hBN particles) exhibited excellent tribological behaviour as reduction of friction and wear, with high tapping torque efficiency. In the orthogonal cutting process, MJO5a recorded the lowest machining force and temperature, thus contributed to the formation of thinner chips, small tool-chip contact length and reduction of the specific energy. MJO5a produced an excellent result in the machinability test by reducing the cutting force, cutting temperature and surface roughness stimulated longer tool life and less tool wear. In conclusion, the MJO5a has a potential impact on the lubricant market as a sustainable MWFs for the machining processes.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Talib, Norfazillah
author_facet	Talib, Norfazillah
author_sort	Talib, Norfazillah
title	Performance evaluation of biodegradable metalworking fluids for machining process
title_short	Performance evaluation of biodegradable metalworking fluids for machining process
title_full	Performance evaluation of biodegradable metalworking fluids for machining process
title_fullStr	Performance evaluation of biodegradable metalworking fluids for machining process
title_full_unstemmed	Performance evaluation of biodegradable metalworking fluids for machining process
title_sort	performance evaluation of biodegradable metalworking fluids for machining process
granting_institution	Universiti Tun Hussein Onn Malaysia
granting_department	Fakulti Kejuruteraan Mekanikal dan Pembuatan
publishDate	2017
url	http://eprints.uthm.edu.my/353/1/24p%20NORFAZILLAH%20TALIB.pdf http://eprints.uthm.edu.my/353/2/NORFAZILLAH%20TALIB%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/353/3/NORFAZILLAH%20TALIB%20WATERMARK.pdf
_version_	1747830589812113408

Performance evaluation of biodegradable metalworking fluids for machining process

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