Abstract 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 °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 °C and 100 °C showed that the nanocomposite presence did not substantially interfere with the oil rheological parameters.

中文翻译：

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用于摩擦学应用的可分散碳量子点/聚（甲基丙烯酸甲酯）纳米复合材料的一步“绿色”合成

摘要 在此，首次提出通过一步、温和、易于扩展的油酸和柠檬酸基复合材料生产聚甲基丙烯酸甲酯/碳量子点 (PMMA/CQDs) 基复合材料。绿色合成。该复合材料由油相容聚合物基体组成，在润滑条件下局部释放抗摩擦和抗磨损 CQD。在广泛表征之后，在不同温度、负载和添加剂浓度下对商用 VG 220 进行摩擦学测试，显示出卓越的性能。在 25 °C 和 19 N 常压下，使用 0.3 wt% PMMA/CQDs，观察到摩擦和磨损分别减少 20.2% 和 41.6%。此外，