期刊
DIAMOND AND RELATED MATERIALS
卷 114, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.diamond.2021.108317
关键词
Carbon dots; Nanofluid; Morphology; Tribological properties
类别
资金
- National Natural Science Foundation of China [52075527, 21404114]
- Natural Science Foundation of Ningbo [2019A610028]
Solid polyelectrolyte grafted carbon dots were synthesized and used to produce carbon dots-based ionic fluid. The results showed significant improvement in friction-reducing and wear-resistance performance in polyethylene glycol. Due to the excellent dispersion, the ionic fluid could form a continuous carbon-rich oil-film at the frictional interface, enhancing friction-reducing and wear-resistance abilities effectively.
Solid polyelectrolyte grafted carbon dots as a precursor were synthesized using citric acid and poly(sodium 4 -styrene sulfonate) via pyrolysis route, which were then capped by block copolymer to produce solvent-free carbon dots-based ionic fluid (CDs-PSS-M2070). The tribological performance of CDs-PSS-M2070 under different concentrations and loads was evaluated in polyethylene glycol (PEG). The results verified that CDs-PSS-M2070 efficiently improved the friction-reducing and wear-resistance performance as well as the load-bearing capacity of PEG in a broad load. The addition of 1.0% CDs-PSS-M2070 reduced wear volume of 82.8% and friction coefficient of 73.5% under the load of 392 N. Owing to the excellent dispersion of carbon dots ionic fluid in PEG, CDs-PSS-M2070 could continue to transfer to the frictional interface and form a continuous carbon-rich oil-film, thereby enhancing friction-reducing and wear-resistance abilities efficiently.
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