Synthesis of water-soluble Cu nanoparticles and evaluation of their tribological properties and thermal conductivity as a water-based additive

Junhua ZHAO; Guangbin YANG; Chunli ZHANG; Yujuan ZHANG; Shengmao ZHANG; Pingyu ZHANG

doi:10.1007/s40544-018-0209-7

Friction 2019, 7(3): 246-259 https://doi.org/10.1007/s40544-018-0209-7

Research Article |

Open Access | Issue | Published: 27 September 2018

Synthesis of water-soluble Cu nanoparticles and evaluation of their tribological properties and thermal conductivity as a water-based additive

Show Author's Information Hide Author's Information Junhua ZHAO, Guangbin YANG(

), Chunli ZHANG, Yujuan ZHANG, Shengmao ZHANG, Pingyu ZHANG(

)

Engineering Research Center for Nanomaterials, Henan University, Kaifeng 475004, China

Keywords:

lubricant additive, water-soluble, Cu nanoparticles, tribological properties

Cite this article:

ZHAO J, YANG G, ZHANG C, et al. Synthesis of water-soluble Cu nanoparticles and evaluation of their tribological properties and thermal conductivity as a water-based additive. Friction, 2019, 7(3): 246-259. https://doi.org/10.1007/s40544-018-0209-7

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Abstract

Efficient and sustainable use of water-based lubricants is essential for energy efficiency. Therefore, the use of water-lubricated mechanical systems instead of conventional oil lubricants is extremely attractive from the viewpoint of resource conservation. In this study, water-soluble Cu nanoparticles of size approximately 3 nm were prepared at room temperature (around 25 ℃) via in-situ surface modification. The tribological behavior of the as-synthesized Cu nanoparticles as an additive in distilled water was evaluated using a universal micro-tribotester. The results show that the as-synthesized Cu nanoparticles, as a water-based lubricant additive, can significantly improve the tribological properties of distilled water. In particular, the lowest friction coefficient of 0.06 was obtained via lubrication with a concentration of 0.6 wt% of Cu nanoparticles in distilled water, which is a reduction of 80.6% compared with that obtained via lubrication with distilled water alone. It is considered that some Cu nanoparticles entered the contact area of the friction pairs to form a complex lubricating film and prevent direct contact of the friction pairs. Furthermore, some Cu nanoparticles in the solution accelerate the heat transfer process, which also results in good tribological properties.

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About this article

Synthesis of water-soluble Cu nanoparticles and evaluation of their tribological properties and thermal conductivity as a water-based additive

Show Author's information Hide Author's Information Junhua ZHAO, Guangbin YANG(

), Chunli ZHANG, Yujuan ZHANG, Shengmao ZHANG, Pingyu ZHANG(

)

Engineering Research Center for Nanomaterials, Henan University, Kaifeng 475004, China

Abstract

Keywords: lubricant additive, water-soluble, Cu nanoparticles, tribological properties

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Publication history

Received: 11 August 2017

Revised: 18 January 2018

Accepted: 29 January 2018

Published: 27 September 2018

Issue date: June 2019

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Acknowledgements

The authors acknowledge the financial support provided by the Ministry of Science and Technology of China (project of "973" Plan, grant No. 2013CB632303) and National Natural Science Foundation of China (grant Nos. 51405132, 21671053 and 51605143).

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