Herein, we have prepared SiO₂ particles uploaded MXene nanosheets via in-situ hydrolysis of tetraetholothosilicate. Due to the large number of groups at the edges of MXene, SiO₂ grows at the edges first, forming MXene@SiO₂ composites with a unique core-rim structure. The tribological properties of MXene@SiO₂ as lubricating additive in 500 SN are evaluated by SRV-5. The results show that MXene@SiO₂ can reduce the friction coefficient of 500 SN from 0.572 to 0.108, the wear volume is reduced by 73.7%, and the load capacity is increased to 800 N. The superior lubricity of MXene@SiO₂ is attributed to the synergistic effect of MXene and SiO₂. The rolling friction caused by SiO₂ not only improves the bearing capacity but also increases the interlayer distance of MXene, avoiding accumulation and making it more prone to interlayer slip. MXene@SiO₂ is adsorbed on the friction interface to form a physical adsorption film and isolate the friction pair. In addition, the high temperature and high load induce the tribochemical reaction and form a chemical protection film during in the friction process. Ultimately, the presence of these protective films results in MXene@SiO₂ having good lubricating properties.

在此，我们通过四乙基硅酸盐的原位水解制备了负载MXene纳米片的SiO ₂颗粒。由于MXene边缘存在大量基团，SiO ₂首先在边缘生长，形成具有独特核-缘结构的MXene@SiO ₂复合材料。通过SRV-5评估了MXene@SiO ₂作为润滑添加剂在500 SN中的摩擦学性能。结果表明，MXene@SiO ₂可使500 SN的摩擦系数由0.572降低至0.108，磨损体积减少73.7%，负载能力提高至800 N。MXene@SiO ₂优越的润滑性归功于MXene和SiO ₂的协同效应。 SiO ₂引起的滚动摩擦不仅提高了承载能力，而且增加了MXene的层间距离，避免堆积并使其更容易发生层间滑移。 MXene@SiO ₂吸附在摩擦界面上形成物理吸附膜，隔离摩擦副。此外，高温和高负载在摩擦过程中会引发摩擦化学反应并形成化学保护膜。最终，这些保护膜的存在使得MXene@SiO ₂具有良好的润滑性能。