阐明负载于金属有机框架材料上的银纳米粒子的摩擦催化润滑机制

二维纳米片作为纳米添加剂所具有的较低层间作用力有助于提升润滑油的摩擦学性能。在本研究中，通过超声辅助成功合成了超薄的二维钴-硼二氯化钴金属有机框架纳米片，并通过化学吸附成功将银纳米颗粒负载在其表面。证明了银@钴-硼二氯化钴纳米复合材料显著提高了 PAO10 基油的摩擦学性能，使摩擦系数降低了 16.7%，磨损率降低了 61.5%。此外，宏观反应进一步证实了 Ag@Co-BDC 纳米添加剂的引入促进了摩擦过程中的摩擦化学反应。这项工作成功合成了具有优异摩擦学性能的新型润滑添加剂，并为摩擦化学反应的机制提供了初步解释。The low interlayer interaction of two-dimensional (2D) nanosheets as nano-additives contributes to enhancing the tribological performance of lubricating oils. In this study, ultrathin 2D cobalt-boron dichloride metal-organic framework (Co-BDC) nanosheets were successfully synthesized via an ultrasound-assisted method, and silver nanoparticles were immobilized on their surfaces through chemical adsorption. It was demonstrated that the as-prepared silver@cobalt-boron dichloride (Ag@Co-BDC) nanocomposite remarkably improved the tribological performance of PAO10 base oil, reducing the friction coefficient by 16.7% and the wear rate by 61.5%. In addition, macroscopic reactions further confirmed that the incorporation of Ag@Co-BDC nano-additives promoted tribochemical reactions during the friction process. This work successfully synthesized a novel lubricating additive with excellent tribological performance, and provided a preliminary explanation for the mechanism of tribochemical reactions.

搜集汇总

背景与挑战

背景概述

该数据集研究了一种新型润滑添加剂——银纳米颗粒负载于钴-硼二氯化钴金属有机框架纳米片的复合材料。实验表明，该添加剂能显著提升PAO10基油的摩擦学性能，使摩擦系数降低16.7%、磨损率降低61.5%，并揭示了其在摩擦过程中促进摩擦化学反应的机制。