The role of oleic acid on the structural changes of graphite nanoplatelets in enhancing the tribological performance of a palm oil-based lubricant
The current work investigates the structural changes of graphite (CG) when employed as an additive in palm kernel oil (PKO)-based nanolubricants without and with oleic acid (OA) surfactant. A four-ball tribotester was used to study the tribological performance of PKO + CG nanolubricants. PKO + CG na...
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my.utm.1065122024-07-09T06:23:11Z http://eprints.utm.my/106512/ The role of oleic acid on the structural changes of graphite nanoplatelets in enhancing the tribological performance of a palm oil-based lubricant Azman, Nurul Farhanah Samion, Syahrullail Mohamad Nor Musa, Mohamad Nor Musa TJ Mechanical engineering and machinery The current work investigates the structural changes of graphite (CG) when employed as an additive in palm kernel oil (PKO)-based nanolubricants without and with oleic acid (OA) surfactant. A four-ball tribotester was used to study the tribological performance of PKO + CG nanolubricants. PKO + CG nanolubricants with OA surfactant outperformed others, demonstrating significant reductions in coefficient of friction (20.5%) and wear scar diameter (9.1%) as compared to the PKO base lubricant. Exfoliation of graphite was facilitated during sliding due to the impact of shear force. A transmission electron microscopy structural study showed that the presence of OA surfactant in nanolubricants stimulated the formation of highly exfoliated graphite, resulting in the formation of scrolling graphite. Furthermore, when lubricated with PKO + CG + OA nanolubricants, Raman spectroscopic study of the worn surface reveals the formation of a more ordered tribofilm at the friction contact. The findings highlight graphite structural changes as the major factor in improving tribological performance. These results could help us learn more about the main mechanism of graphite as a lubricant additive and how structural changes affect tribological performance. Institution of Mechanical Engineers (IMechE) 2023-06 Article PeerReviewed Azman, Nurul Farhanah and Samion, Syahrullail and Mohamad Nor Musa, Mohamad Nor Musa (2023) The role of oleic acid on the structural changes of graphite nanoplatelets in enhancing the tribological performance of a palm oil-based lubricant. Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 237 (6). pp. 1353-1371. ISSN 1350-6501 http://dx.doi.org/10.1177/13506501221134162 DOI:10.1177/13506501221134162 |
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TJ Mechanical engineering and machinery Azman, Nurul Farhanah Samion, Syahrullail Mohamad Nor Musa, Mohamad Nor Musa The role of oleic acid on the structural changes of graphite nanoplatelets in enhancing the tribological performance of a palm oil-based lubricant |
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The current work investigates the structural changes of graphite (CG) when employed as an additive in palm kernel oil (PKO)-based nanolubricants without and with oleic acid (OA) surfactant. A four-ball tribotester was used to study the tribological performance of PKO + CG nanolubricants. PKO + CG nanolubricants with OA surfactant outperformed others, demonstrating significant reductions in coefficient of friction (20.5%) and wear scar diameter (9.1%) as compared to the PKO base lubricant. Exfoliation of graphite was facilitated during sliding due to the impact of shear force. A transmission electron microscopy structural study showed that the presence of OA surfactant in nanolubricants stimulated the formation of highly exfoliated graphite, resulting in the formation of scrolling graphite. Furthermore, when lubricated with PKO + CG + OA nanolubricants, Raman spectroscopic study of the worn surface reveals the formation of a more ordered tribofilm at the friction contact. The findings highlight graphite structural changes as the major factor in improving tribological performance. These results could help us learn more about the main mechanism of graphite as a lubricant additive and how structural changes affect tribological performance. |
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Azman, Nurul Farhanah Samion, Syahrullail Mohamad Nor Musa, Mohamad Nor Musa |
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Azman, Nurul Farhanah Samion, Syahrullail Mohamad Nor Musa, Mohamad Nor Musa |
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Azman, Nurul Farhanah |
title |
The role of oleic acid on the structural changes of graphite nanoplatelets in enhancing the tribological performance of a palm oil-based lubricant |
title_short |
The role of oleic acid on the structural changes of graphite nanoplatelets in enhancing the tribological performance of a palm oil-based lubricant |
title_full |
The role of oleic acid on the structural changes of graphite nanoplatelets in enhancing the tribological performance of a palm oil-based lubricant |
title_fullStr |
The role of oleic acid on the structural changes of graphite nanoplatelets in enhancing the tribological performance of a palm oil-based lubricant |
title_full_unstemmed |
The role of oleic acid on the structural changes of graphite nanoplatelets in enhancing the tribological performance of a palm oil-based lubricant |
title_sort |
role of oleic acid on the structural changes of graphite nanoplatelets in enhancing the tribological performance of a palm oil-based lubricant |
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Institution of Mechanical Engineers (IMechE) |
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2023 |
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http://eprints.utm.my/106512/ http://dx.doi.org/10.1177/13506501221134162 |
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