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Study of graphene nanolubricant using thermogravimetric analysis

Published online by Cambridge University Press:  09 December 2015

Abdul Khaliq Rasheed
Affiliation:
Manufacturing & Industrial Processes Division, Faculty of Engineering, University of Nottingham Malaysia Campus, Semenyih, Selangor 43500, Malaysia
Mohammad Khalid*
Affiliation:
Manufacturing & Industrial Processes Division, Faculty of Engineering, University of Nottingham Malaysia Campus, Semenyih, Selangor 43500, Malaysia
Rashmi Walvekar
Affiliation:
Energy Research Division, Taylor's University, Subang Jaya, Selangor 47500, Malaysia
Thummalapalli Chandra Sekhara Manikyam Gupta
Affiliation:
Apar Industries Limited, Chembur, Mumbai 400071, India
Andrew Chan
Affiliation:
Environmental Research Division, Faculty of Engineering, University of Nottingham Malaysia Campus, Semenyih, Selangor 43500, Malaysia
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Thermal degradation of graphene based mineral oil lubricants was studied using thermogravimetric analysis (TGA). As-synthesized graphene sheets of 8, 12, and 60 nm thick and engine oil formulations 20W50 SN/CF and 20W50 SJ/CF were used for synthesizing various test samples. UV-Vis spectrophotometry, zeta potential, field emission scanning electron microscopy, and energy-dispersive x-ray spectroscopy were used to characterize the graphene sheets and the nanolubricants. TGA revealed that the onset temperature of oxidation for the SN/CF oil could be delayed by 13–17 °C in the presence of graphene. Moreover the rate of oxidation when the weight loss of oil in the presence of graphene reaches 40–20% could be delayed by more than 30 °C. Resistance to oil degradation depends strongly on the graphene nanoparticle size and concentration. TGA kinetics studies show that the base oils have higher activation energy (Ea) and the addition of graphene significantly reduces Ea.

Type
Invited Articles
Copyright
Copyright © Materials Research Society 2015 

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