Constructing MXene quantum dots decorated covalent organic frameworks as oil-based lubricant additive

IF 6.8 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Science China Materials Pub Date : 2025-03-03 DOI:10.1007/s40843-024-3250-x

Yichen Wang (, ), Fei Zhao (, ), Haoyuan Yang (, ), Ke Yang (, ), Tianyi Zhang (, ), Qian Ye (, ), Yibo He (, ), Xuqing Liu (, )

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引用次数: 0

Abstract

Nanoadditives offer a promising way to reduce friction and wear. In this study, an organic–inorganic hybrid material composed of MXene quantum dots (MQDs) and cetyl trimethylammonium bromide decorated covalent organic frameworks (CNUS-2) is successfully constructed via an electrostatic self-assembly strategy. The combination of MQDs and CNUS-2 not only increases the interlayer spacing of NUS-2 but also mitigates the self-aggregation of MQDs, maximizing the advantages of their intrinsic characteristics. Owing to the synergistic lubrication effect of zero-dimensional MQDs and two-dimensional NUS-2, improved lubricity and interfacial bonding ability are realized. In addition, the relative slip between the CNUS-2@MQDs sheets can reduce friction and anti-wear. As expected, different levels of CNUS-2@MQDs effectively boost the tribological properties. The friction coefficient (0.097) and wear volume (1.48×10⁵ µm³) of PAO-10 oil are reduced by 46.7% and 92.6% respectively, after the introduction of the 3.0 wt% CNUS-2@MQDs nanocomposite. Furthermore, the abundant oxygen-containing functional groups in CNUS-2 can accelerate the formation of adsorption and tribochemical reaction films, whereas the MQDs can repair worn surfaces, resulting in superior lubrication performance under variable load, temperature, and frequency conditions. This work not only effectively improves lubrication performance by developing a unique CNUS-2@MQDs nanocomposite, but also provides a reference for the design of novel lubricant additives.

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构建MXene量子点装饰共价有机骨架作为油基润滑油添加剂

纳米添加剂提供了一种很有前途的减少摩擦和磨损的方法。在本研究中，通过静电自组装策略成功构建了由MXene量子点（MQDs）和十六烷基三甲基溴化铵修饰的共价有机骨架（CNUS-2）组成的有机-无机杂化材料。mqd与CNUS-2的结合不仅增加了NUS-2的层间距，而且减轻了mqd的自聚集，最大限度地发挥了其固有特性的优势。由于零维mqd和二维NUS-2的协同润滑作用，实现了润滑性和界面键合能力的提高。此外，CNUS-2@MQDs片材之间的相对滑移可以减少摩擦和抗磨。正如预期的那样，不同水平的CNUS-2@MQDs有效地提高了摩擦学性能。引入3.0 wt% CNUS-2@MQDs纳米复合材料后，聚苯乙烯-10油的摩擦系数（0.097）和磨损体积（1.48×105µm3）分别降低了46.7%和92.6%。此外，CNUS-2中丰富的含氧官能团可以加速吸附和摩擦化学反应膜的形成，而mqd可以修复磨损表面，从而在变载荷、温度和频率条件下具有优异的润滑性能。该工作不仅通过开发独特的CNUS-2@MQDs纳米复合材料有效地改善了润滑性能，而且为新型润滑剂添加剂的设计提供了参考。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Science China Materials Materials Science-General Materials Science

CiteScore

11.40

自引率

7.40%

发文量

949

期刊介绍： Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.