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Open AccessArticle

Scalable Fabrication of Modified Graphene Nanoplatelets as an Effective Additive for Engine Lubricant Oil

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Institute of Chemistry and Materials, Nghia Do, Cau Giay, Hanoi 10000, Vietnam
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Environmental Institute, Vietnam Maritime University, Haiphong city 180000, Vietnam
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Advanced Nanomaterial Lab, Applied Nano Technology Jsc., Xuan La, Tay Ho, Hanoi 100000, Vietnam
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Department of Biotechnology and Bioinformatics, Jaypee University of Information Technology, Waknaghat 173215, India
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Institute of Materials Science, Vietnam Academy of Science and Technology, Hanoi 100000, Vietnam
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Department of Environmental Energy Engineering, Kyonggi University, Suwon 16227, Korea
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Institution of Research and Development, Duy Tan University, Da Nang 550000, Vietnam
*
Authors to whom correspondence should be addressed.
Nanomaterials 2020, 10(5), 877; https://doi.org/10.3390/nano10050877
Received: 13 March 2020 / Revised: 10 April 2020 / Accepted: 11 April 2020 / Published: 1 May 2020
(This article belongs to the Special Issue Properties and Applications of Graphene and Its Derivatives)
The use of nano-additives is widely recognized as a cheap and effective pathway to improve the performance of lubrication by minimizing the energy loss from friction and wear, especially in diesel engines. In this work, a simple and scalable protocol was proposed to fabricate a graphene additive to improve the engine lubricant oil. Graphene nanoplates (GNPs) were obtained by a one-step chemical exfoliation of natural graphite and were successfully modified with a surfactant and an organic compound to obtain a modified GNP additive, that can be facilely dispersed in lubricant oil. The GNPs and modified GNP additive were characterized using scanning electron microscopy, X-ray diffraction, atomic force microscopy, Raman spectroscopy, and Fourier-transform infrared spectroscopy. The prepared GNPs had wrinkled and crumpled structures with a diameter of 10–30 µm and a thickness of less than 15 nm. After modification, the GNP surfaces were uniformly covered with the organic compound. The addition of the modified GNP additive to the engine lubricant oil significantly enhanced the friction and antiwear performance. The highest reduction of 35% was determined for the wear scar diameter with a GNP additive concentration of approximately 0.05%. The mechanism for lubrication enhancement by graphene additives was also briefly discussed. View Full-Text
Keywords: modified graphene nanoplates; graphene additives; antifriction; engine lubricant oil additives; antiwear modified graphene nanoplates; graphene additives; antifriction; engine lubricant oil additives; antiwear
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La, D.D.; Truong, T.N.; Pham, T.Q.; Vo, H.T.; Tran, N.T.; Nguyen, T.A.; Nadda, A.K.; Nguyen, T.T.; Chang, S.W.; Chung, W.J.; Nguyen, D.D. Scalable Fabrication of Modified Graphene Nanoplatelets as an Effective Additive for Engine Lubricant Oil. Nanomaterials 2020, 10, 877.

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