在边界滑下,研究油酸修饰的MoS2的滑动tribological行为
Liming Guo1,2, Ling Pan1,2, Zhi Li1,2
1School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, Fujian 350108, China.
Langmuir : the ACS journal of surfaces and colloids
|October 9, 2023
概括
二硫化物 (MoS) 降低了脂中的摩擦,但可以聚合. 油酸修饰的MoS2形成了一个稳定的薄膜,在高压和剪切下改善滑.
科学领域:
- 部落学 (tribology) 是一个学科.
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
背景情况:
- 边界滑对于减少机械系统中的摩擦和磨损至关重要.
- 基于的油脂被广泛使用,但它们的性能可以通过添加剂来提高.
- 了解纳米尺度上的添加行为是提高滑剂性能的关键.
研究的目的:
- 为了研究二硫化物 (MoS2) 和酸修饰的MoS2在脂中的三元学效应.
- 通过分子动力学 (MD) 模拟和实验验证,在极限条件下阐明滑机制.
- 探索MoS2聚合和表面吸附对摩擦和磨损的影响.
主要方法:
- 粗壁边界滑模型的分子动力学 (MD) 模拟.
- 实验摩擦和磨损测试使用Retc摩擦和磨损测试机.
- 应力,磨损,摩擦力,正常压力和摩擦热量的定量计算.
主要成果:
- 添加MoS2可以减少摩擦,磨损和温度,但在高压下聚合,阻碍滑.
- 油酸 (OA) 修改的MoS2减少了聚合,并在金属表面形成了稳定的滑膜.
- 这项研究确定了纳米尺度结构和宏观 Tribological 特性之间的联系.
结论:
- 通过OA修饰,通过防止聚合和促进稳定的薄膜形成,增强了MoS2的滑作用.
- 这些发现提供了关于墙壁粗性和颗粒大小对滑剂性能影响机制的见解.
- 这项研究为开发具有提高高压性能的先进滑油提供了理论基础.
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