Mass‐produced Cu nanoparticles as lubricant additives for reducing friction and wear

Abstract

This paper reported the tribological behaviours of Cu nanoparticles as lubricant additives. Cu nanoparticles were prepared by an innovative technology called mass‐produced nanoparticles (MPNP). A SRV‐IV friction and wear tester was used to investigate the influence of load on the tribological performance of 0.1 ~ 2 wt% Cu nanoparticles. The results indicated adding 0.1 wt% Cu nanoparticles into PAO6 base oil and 10 W/40 CH‐4 commercial lubricant, reduce the average friction coefficient by 38% and 3%, and decrease the wear rate by 96% and 66% under 300 N, respectively, compared to the lubricants without nanoparticles. The excellent antiwear and antifriction effect could be attributed to the rolling effect caused by the ideal spherical shape and good dispersibility of the prepared Cu nanoparticles and form deposition film on the surface of the friction pair. Therefore, the Cu nanoparticles prepared by MPNP show excellent tribological performance and possess broad prospects in the fields of lubricant additives.

Preparation of Nanofluid of Lanthanum Borate Nanosheets and Investigation of Its Tribological Properties and Tribomechamisms in Different Base Oils

“…Previous researches demonstrate that the lubricant additives such as oil-soluble nano-Cu with a relatively low melting point [32,33] and functionalized BN nanosheets [34,35] have good friction-reducing and antiwear properties. This is because the surface modi er of the oil-soluble nano-Cu plays a role in reducing the friction coe cient while the Cu nanocore plays a role in load-carrying during the friction process [32,33]. Similarly, molybdenum dialkyldithiocarbamate (MoDTC), a commonly used lubricating oil additive, exhibits excellent friction-reducing ability in PAO base oil, because it forms a surface layer of MoS 2 nanocrystal with a low shear strength; its antiwear ability in the same base oil, however, is relatively poor [36,37].…”

“…While the additive concentration is too high, OA-LBNs nano uid tends to agglomerate, thereby damaging the compactness and continuity of the oil lm as well as antiwear ability [31]. Previous researches demonstrate that the lubricant additives such as oil-soluble nano-Cu with a relatively low melting point [32,33] and functionalized BN nanosheets [34,35] have good friction-reducing and antiwear properties. This is because the surface modi er of the oil-soluble nano-Cu plays a role in reducing the friction coe cient while the Cu nanocore plays a role in load-carrying during the friction process [32,33].…”

In Situ Graphene Formation Induced by Tribochemical Reaction for Sustainable Lubrication

“…Meanwhile, the lubrication ability of lubricating oil requires further improvement due to the more drastic actual application conditions. Various materials including carbon and its derivatives, metals, metal oxides, sulfides, rare-earth compounds, nitrogenous heterocyclic compounds, borates, and ionic liquids, are utilized as additives and added into lubricating oil to enhance its lubrication performance. Thereinto, carbon materials acquire more attention in virtue of their excellent mechanical properties, superior thermal and chemical stability, environmentally friendly property, and peculiar self-lubricating property .…”

Organic-modified ZnS nanoparticles as a high-performance lubricant additive

“…Metallic, ceramic, and carbon-based nanomaterials are widely used as oil additives. [1][2][3][4][5][6][7][8][9] Good dispersibility and stability in the oil are oen required to achieve desired functionality and performance. The interaction between NPs and oil molecules could be improved either by adding dispersants or by NP surface modication.…”