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Wear performance of oleate-based esters with two-, three-, and four-branched molecular structure in pure form and mixture

This paper reports the optimization of base oils composition involving oleate-based bio-lubricant that results in minimal wear-scar diameter (WSD) and coefficient of friction (COF) using mixture technique (MT) with simplex-lattice design (SLD). The lubricants used were neopenthylglycol dioleate (NPG...

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Main Authors: Zulfattah, Z. M., Mohd Zulkifli, Nurin Wahidah, Haji Hassan, Masjuki, Harith, M. H., Syahir, A. Z., Norain, I, Mohd Yusoff, Mohd Nur Ashraf, Jamshaid, M., Arslan, A.
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Published: American Society of Mechanical Engineers 2021
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TJ Mechanical engineering and machinery
Online Access:http://eprints.um.edu.my/34305/
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spelling my.um.eprints.343052022-08-01T01:10:56Z http://eprints.um.edu.my/34305/ Wear performance of oleate-based esters with two-, three-, and four-branched molecular structure in pure form and mixture Zulfattah, Z. M. Mohd Zulkifli, Nurin Wahidah Haji Hassan, Masjuki Harith, M. H. Syahir, A. Z. Norain, I Mohd Yusoff, Mohd Nur Ashraf Jamshaid, M. Arslan, A. TJ Mechanical engineering and machinery This paper reports the optimization of base oils composition involving oleate-based bio-lubricant that results in minimal wear-scar diameter (WSD) and coefficient of friction (COF) using mixture technique (MT) with simplex-lattice design (SLD). The lubricants used were neopenthylglycol dioleate (NPGDO), trimethylolpropane trioleate (TMPTO), and pentaerythritol etraoleate (PETO), which all are products of transesterification process between oleic acid and different types of alcohols becoming oleate ester. Fourball tester (FBT) was used to evaluate the resulting COF under ASTM-D4172 B testing procedure, while WSD was measured under an optical wear-scar measuring device. A second-order polynomial mathematical model was built and able to statistically predict the resulting WSD and COF of lubricant mixtures. In pure form, PETO exhibited the lowest COF with 0.06555 followed by NPGDO (+5.25%) and TMPTO (+16.97%). Meanwhile, NPGDO recorded the smallest WSD with 0.451 mm, followed by PETO (+4.04%) and TMPTO (+8.89%). Under SLD optimization technique, pure PETO was shown to give out the lowest COF; however, the lowest WSD was recorded by a mixture of 80.661 wt% PETO with 11.603 wt% TMPTO, and 7.736 wt% NPGDO resulting in 0.444 mm WSD; 5.53% lower wear than pure NPGDO. American Society of Mechanical Engineers 2021-01-01 Article PeerReviewed Zulfattah, Z. M. and Mohd Zulkifli, Nurin Wahidah and Haji Hassan, Masjuki and Harith, M. H. and Syahir, A. Z. and Norain, I and Mohd Yusoff, Mohd Nur Ashraf and Jamshaid, M. and Arslan, A. (2021) Wear performance of oleate-based esters with two-, three-, and four-branched molecular structure in pure form and mixture. Journal of Tribology, 143 (1). ISSN 0742-4787, DOI https://doi.org/10.1115/1.4047584 <https://doi.org/10.1115/1.4047584>. 10.1115/1.4047584
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
Zulfattah, Z. M.
Mohd Zulkifli, Nurin Wahidah
Haji Hassan, Masjuki
Harith, M. H.
Syahir, A. Z.
Norain, I
Mohd Yusoff, Mohd Nur Ashraf
Jamshaid, M.
Arslan, A.
Wear performance of oleate-based esters with two-, three-, and four-branched molecular structure in pure form and mixture
description This paper reports the optimization of base oils composition involving oleate-based bio-lubricant that results in minimal wear-scar diameter (WSD) and coefficient of friction (COF) using mixture technique (MT) with simplex-lattice design (SLD). The lubricants used were neopenthylglycol dioleate (NPGDO), trimethylolpropane trioleate (TMPTO), and pentaerythritol etraoleate (PETO), which all are products of transesterification process between oleic acid and different types of alcohols becoming oleate ester. Fourball tester (FBT) was used to evaluate the resulting COF under ASTM-D4172 B testing procedure, while WSD was measured under an optical wear-scar measuring device. A second-order polynomial mathematical model was built and able to statistically predict the resulting WSD and COF of lubricant mixtures. In pure form, PETO exhibited the lowest COF with 0.06555 followed by NPGDO (+5.25%) and TMPTO (+16.97%). Meanwhile, NPGDO recorded the smallest WSD with 0.451 mm, followed by PETO (+4.04%) and TMPTO (+8.89%). Under SLD optimization technique, pure PETO was shown to give out the lowest COF; however, the lowest WSD was recorded by a mixture of 80.661 wt% PETO with 11.603 wt% TMPTO, and 7.736 wt% NPGDO resulting in 0.444 mm WSD; 5.53% lower wear than pure NPGDO.
format Article
author Zulfattah, Z. M.
Mohd Zulkifli, Nurin Wahidah
Haji Hassan, Masjuki
Harith, M. H.
Syahir, A. Z.
Norain, I
Mohd Yusoff, Mohd Nur Ashraf
Jamshaid, M.
Arslan, A.
author_facet Zulfattah, Z. M.
Mohd Zulkifli, Nurin Wahidah
Haji Hassan, Masjuki
Harith, M. H.
Syahir, A. Z.
Norain, I
Mohd Yusoff, Mohd Nur Ashraf
Jamshaid, M.
Arslan, A.
author_sort Zulfattah, Z. M.
title Wear performance of oleate-based esters with two-, three-, and four-branched molecular structure in pure form and mixture
title_short Wear performance of oleate-based esters with two-, three-, and four-branched molecular structure in pure form and mixture
title_full Wear performance of oleate-based esters with two-, three-, and four-branched molecular structure in pure form and mixture
title_fullStr Wear performance of oleate-based esters with two-, three-, and four-branched molecular structure in pure form and mixture
title_full_unstemmed Wear performance of oleate-based esters with two-, three-, and four-branched molecular structure in pure form and mixture
title_sort wear performance of oleate-based esters with two-, three-, and four-branched molecular structure in pure form and mixture
publisher American Society of Mechanical Engineers
publishDate 2021
url http://eprints.um.edu.my/34305/
_version_ 1740826049484161024
score 13.211869

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