期刊
APPLIED SURFACE SCIENCE
卷 491, 期 -, 页码 105-115出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2019.06.141
关键词
Graphene oxide; Ionic liquids; Synergistic effect; Lubrication
类别
资金
- National Natural Science Foundation of China [51705435, 51575459]
- Key Project of Sichuan Department of Science and Technology [2018JZ0048]
- Key Projects of Guangxi Province Science and Technology Plan
- Fundamental Research Funds for the Central Universities [2018GF05]
How to make full use of the synergistic effect between nanomaterials is of great significance for designing high-performance lubricating materials. Here, novel amine-terminated ionic liquid-modified graphene oxide (GO)/copper nanocomposite (IL-GO/Cu) is synthesized by facile liquid-phase method in which GO nanosheets and Cu nanoparticles are linked by 1-aminoethyl-3-methyl imidazolium nitrate ionic liquid through covalently grafting and electrostatic interaction. Of what interest is the homogeneous distribution of Cu nanoparticles on IL-GO plane/interlayers, possibly being endowed to excellent lubrication function. Results demonstrate that IL-GO/Cu nanocomposite with 0.08 wt% addition amount into polyethylene glycol (PEG 200) improves friction and wear resistance by up to 40.1% and 47%, respectively. Such performance characteristics mainly depend on the synergistic lubrication, including not only the boundary lubrication film composed of adsorbed/transfer/tribochemical film, but also the third body from the additive and its wear debris with Fe/Cu nanocrystals-embedded graphene-like structure. This paper offers an attractive strategy for fabricating graphene-based nanocomposite toward real-world application in tribology.
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