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Tribological properties of lyophilized graphene loading nano-copper as lubricating oil additive

Runling Peng (School of Mechatronic Engineering, Xi'an Technological University, Xi'an, China)
Jinyue Liu (School of Mechatronic Engineering, Xi'an Technological University, Xi'an, China)
Wei Wang (School of Mechatronic Engineering, Xi'an Technological University, Xi'an, China)
Peng Wang (School of Mechatronic Engineering, Xi'an Technological University, Xi'an, China)
Shijiao Liu (School of Optoelectronic Engineering, Xi'an Technological University, Xi'an, China)
Haonan Zhai (School of Mechatronic Engineering, Xi'an Technological University, Xi'an, China)
Leyang Dai (School of Marine Engineering, Jimei University, Xiamen, China)
Junde Guo (School of Mechatronic Engineering, Xi'an Technological University, Xi'an, China)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 24 March 2023

Issue publication date: 4 April 2023

72

Abstract

Purpose

This study aims to investigate the synergistic friction reduction and antiwear effects of lyophilized graphene loading nano-copper (RGO/Cu) as lubricating oil additives, compared with graphene.

Design/methodology/approach

The friction performance of freeze-drying graphene (RGO) and RGO/Cu particles was investigated at different addition concentrations and under different conditions.

Findings

Graphene plays a synergistic friction reduction and antiwear effect because of its large specific surface area, surface folds and loading capacity on the nanoparticles. The results showed that the average friction coefficients of RGO and RGO/Cu particles were 22.9% and 6.1% lower than that of base oil and RGO oil, respectively. In addition, the widths of wear scars were 62.3% and 55.3% lower than those of RGO/Cu particles, respectively.

Originality/value

The RGO single agent is suitable for medium-load and high-speed conditions, while the RGO/Cu particles can perform better in the conditions of heavy load and high speed.

Keywords

Acknowledgements

Fundings: This work was supported by Science and Technology Project of Xi’an (21XJZZ0027), Basic Natural Science Research Program of Shaanxi Province (2022JQ-387), Innovation Capability Support Program of Shaanxi (2021KJXX-81) and Science and Technology Project of Shaanxi Province (2022GY-214).

Author contributions: Runling Peng and Junde Guo conceived and designed this work; Jinyue Liu, Wei Wang and Peng Wang performed the properties of freeze-dried graphene loading nano-copper particle; Shijiao Liu and Haonan Zhai prepared the original draft; and Leyang Dai edited the draft.

Citation

Peng, R., Liu, J., Wang, W., Wang, P., Liu, S., Zhai, H., Dai, L. and Guo, J. (2023), "Tribological properties of lyophilized graphene loading nano-copper as lubricating oil additive", Industrial Lubrication and Tribology, Vol. 75 No. 3, pp. 325-332. https://doi.org/10.1108/ILT-08-2022-0254

Publisher

:

Emerald Publishing Limited

Copyright © 2023, Emerald Publishing Limited

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