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Study of tribological properties of lubricating oil blend added with graphene nanoplatelets

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Abstract

This paper investigates the effects of graphene nanoplatelets (GNPs) as additives in palm-oil trimethylolpropane (TMP) ester blended in polyalphaolefin. Different concentrations of GNPs that were ultrasonically homogenized in blended lubricants consist of 95 vol% polyalphaolefin and 5 vol% TMP ester. Physical properties of the nanolubricants were identified and tribological behaviors of GNP in blended lubricants were studied using standard fourball testing and surface analysis was done on the wear surfaces using scanning electron microscopy and energy-dispersive x-ray techniques. Addition of 0.05 wt% GNP in blended lubricant resulted in the lowest coefficient of friction and wear scar diameter, thus selected as the most suitable concentration of GNP in the blended lubricant. Friction and wear were reduced by 5 and 15% respectively, with the presence of 0.05 wt% GNP in the blended lubricant.

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ACKNOWLEDGMENTS

The financial support provided by FP032-2013A, high impact research grants UM.C/HIR/MOHE/ENG/60 and BK062-2014 is gratefully acknowledged. Acceptance of and presentation opportunities in Malaysian International Tribology Conference (MITC) 2015 is much appreciated.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia

    Siti Safiyah Nor Azman, Nurin Wahidah Mohd Zulkifli, Hassan Masjuki, Mubashir Gulzar & Rehan Zahid

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  1. Siti Safiyah Nor Azman
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  2. Nurin Wahidah Mohd Zulkifli
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  3. Hassan Masjuki
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  4. Mubashir Gulzar
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  5. Rehan Zahid
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Correspondence to Hassan Masjuki.

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Azman, S.S.N., Zulkifli, N.W.M., Masjuki, H. et al. Study of tribological properties of lubricating oil blend added with graphene nanoplatelets. Journal of Materials Research 31, 1932–1938 (2016). https://doi.org/10.1557/jmr.2016.24

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  • DOI: https://doi.org/10.1557/jmr.2016.24

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