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

Published online by Cambridge University Press:  11 February 2016

Siti Safiyah Nor Azman ,
Nurin Wahidah Mohd Zulkifli ,
Hassan Masjuki ,
Mubashir Gulzar  and
Rehan Zahid
Siti Safiyah Nor Azman
Affiliation:
Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia
Nurin Wahidah Mohd Zulkifli
Affiliation:
Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia
Hassan Masjuki*
Affiliation:
Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia
Mubashir Gulzar
Affiliation:
Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia
Rehan Zahid
Affiliation:
Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia
*
a)Address all correspondence to this author. e-mail: [email protected]
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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.

Keywords

tribologylubricantadditives
Type
Invited Articles
Information
Journal of Materials Research , Volume 31 , Issue 13: Focus Issue: Advances and Challenges in Carbon-based Tribomaterials , 14 July 2016 , pp. 1932 - 1938
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Copyright
Copyright © Materials Research Society 2016 

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