期刊
TRIBOLOGY INTERNATIONAL
卷 148, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.triboint.2020.106311
关键词
New synthesis approach; Oil compatible PMMA/CQDs; Friction and wear reduction
资金
- National Operative Programme for Companies and Competitiveness 2014-2020 - Horizon 2020 - European Union [F/050190/01-02/x32]
Herein, the production of a poly (methyl methacrylate)/carbon quantum dots (PMMA/CQDs)-based composite has been proposed for the first time through a one-step, mild temperature, easily scalable oleic acid- and citric acid-based green synthesis. The composite consists of an oil-compatible polymer matrix which locally releases anti-friction and anti-wear CQDs under lubrication conditions. After extensive characterization, tribological tests were performed in commercial VG 220 at different temperatures, loads and additive concentrations, showing remarkable performance. At 25 degrees C and under a 19 N normal pressure, with 0.3 wt% PMMA/CQDs, 20.2% and 41.6% reductions were observed for friction and wear, respectively. Furthermore, viscosities measurements at both 40 degrees C and 100 degrees C showed that the nanocomposite presence did not substantially interfere with the oil rheological parameters.
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