Tribological properties of polyimide coating filled with solvent-free covalent carbon quantum dots nanofluids

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International Pub Date : 2024-11-06 DOI:10.1016/j.triboint.2024.110376

Baokai Zhang , Xianqiang Pei , Yanming Wang , Shanhong Wan , Gai Zhao , Qihua Wang , Tingmei Wang

引用次数: 0

Abstract

Novel organic coatings were developed by incorporating solvent-free covalent carbon quantum dots nanofluids (CQDs NFs) into a polyimide (PI) matrix. The tribological properties of CQDs NFs/PI composite coatings were tested using a ball-on-disk tribometer, revealing that even a low loading of CQDs NFs significantly improved tribological performance of PI. Molecular dynamics (MD) simulations and nanoindentation tests showed that CQDs NFs restricted PI molecular chain movement, enhancing mechanical properties. Additionally, CQDs NFs promoted the formation of stable transfer films on steel surfaces, improving wear resistance. This study confirms CQDs NFs' effectiveness in modifying PI composite coatings' friction and wear properties.

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无溶剂共价碳量子点纳米流体填充聚酰亚胺涂层的摩擦学特性

通过在聚酰亚胺（PI）基体中加入无溶剂共价碳量子点纳米流体（CQDs NFs），开发出了新型有机涂层。使用球盘摩擦磨损仪测试了 CQDs NFs/PI 复合涂层的摩擦学性能，结果表明即使 CQDs NFs 的负载量很低，也能显著改善 PI 的摩擦学性能。分子动力学（MD）模拟和纳米压痕测试表明，CQDs NFs 限制了 PI 分子链的运动，从而提高了机械性能。此外，CQDs NFs 还能促进钢表面形成稳定的转移膜，从而提高耐磨性。这项研究证实了 CQDs NFs 在改变 PI 复合涂层的摩擦和磨损性能方面的有效性。

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

Tribology International 工程技术-工程：机械

CiteScore

10.10

自引率

16.10%

发文量

627

审稿时长

35 days

期刊介绍： Tribology is the science of rubbing surfaces and contributes to every facet of our everyday life, from live cell friction to engine lubrication and seismology. As such tribology is truly multidisciplinary and this extraordinary breadth of scientific interest is reflected in the scope of Tribology International. Tribology International seeks to publish original research papers of the highest scientific quality to provide an archival resource for scientists from all backgrounds. Written contributions are invited reporting experimental and modelling studies both in established areas of tribology and emerging fields. Scientific topics include the physics or chemistry of tribo-surfaces, bio-tribology, surface engineering and materials, contact mechanics, nano-tribology, lubricants and hydrodynamic lubrication.