多孔Cu-BTC/Ag纳米复合润滑剂减摩与自修复性能研究  

Antifriction and self-healing properties of porous Cu-BTC/Ag nanocomposite lubricant

作　　者：王宇芸 张国亮 尹维 杨铎 翁艺斌 李奇 WANG Yuyun;ZHANG Guoliang;YIN Wei;YANG Duo;WENG Yibin;LI Qi(School of Mechanical Engineering,Tianjin University of Technology and Education,Tianjin 300222,China;CNPC Safety and Environmental Technology Research Institute Co.LTD,Beijing 102206,China;Qingyan Gaozhuang Technology(Tianjin)Co.LTD,Tianjin 300300,China)

机构地区：[1]天津职业技术师范大学机械工程学院,天津300222 [2]中国石油集团安全环保技术研究院有限公司,北京102206 [3]清研高装科技(天津)有限公司,天津300300

出　　处：《西安理工大学学报》2023年第4期521-528,566,共9页Journal of Xi'an University of Technology

基　　金：国家自然科学基金资助项目(52175181);中国石油集团安全环保技术研究院石油石化污染物控制与处理国家重点实验室开放课题项目(PPC2020011)。

摘　　要：针对润滑剂界面减摩持续性能差导致的磨损失效问题,本文设计了一种新型多孔Cu-BTC/Ag纳米复合添加剂,并研究其摩擦学性能及界面自修复行为。首先采用溶剂热法制备了多孔Cu-BTC/Ag纳米复合润滑添加剂,并利用扫描电子显微镜(SEM)对其微观形貌进行了表征,其次将该纳米复合润滑剂均匀分散于正十六烷基础油内,利用UMT-5多功能摩擦磨损试验机研究了其摩擦学性能。结果表明:Cu-BTC/0.1%Ag纳米复合润滑添加剂的减摩效果最优,与正十六烷的摩擦系数相比降低约31%;基于磨痕表面的SEM图、三维形貌图和磨痕宽度深度柱状图可以看出,磨痕的宽度、深度各降低约35.2%和68%,磨痕的数量变少、深度变浅以及磨损表面更为平整。这主要由于润滑添加剂的多孔结构,孔内存储了少量的润滑油,在摩擦过程中,其内部的润滑油持续向摩擦界面补给,对摩擦接触区起到了持续润滑的效果。对磨痕表面进行能谱仪(EDS)元素分析,发现含有大量铜元素,表明多孔Cu-BTC受力时发生挤压变形,单晶纳米颗粒修补摩擦界面划痕和沟壑,具有修复摩擦界面磨损缺陷的功能。In this paper,a new porous Cu-BTC/Ag nanocomposite additive was designed to solve the problem of wear failure caused by poor interfacial anti-friction durability of lubricants,with its tribological properties and interfacial self-healing behavior studied.Firstly,porous Cu-BTC/Ag nano-composite lubricant additive was prepared by the solvothermal method,and it had been used to characterize the microstructure by using the scanning electron microscope(SEM).Secondly,the nano-composite lubricant additive was dispersed into n-hexadecane base oil.Finally,the tribological property of the nano-composite lubricant additive was studied by using UMT-5 multi-functional friction and wear testing machine.The results show that Cu-BTC/0.1%Ag nano-composite lubricant additive has the best anti-friction effect,which reduces the friction coefficient by about 31%compared with that by n-hexadecane.Based on the SEM figures of wear surface,3D morphologies of wear surface and wear width and depth bar graph,it can be seen that the width and depth of the wear marks are reduced by approximately 35.2%and 68%respectively.The number of abrasion marks becomes less,the depth becomes shallower and the wear surface is flatter.Due to the porous structure of the additive,a small amount of lubricant is stored in the pores.During the friction process,the internal lubricating oil of the additive continues to supply to the friction interface,which plays a continuous lubrication effect on the frictional contact area.The EDS analysis of the surface of the friction marks showed that there was a large amount of copper element,indicating that the porous Cu-BTC was extruded and deformed under stress,and that the single crystal nanoparticles kept filling the scratches and furrows of the friction interface,which had the function of repairing the friction interface.

关 键 词：纳米AG 纳米复合添加剂 多孔结构 持续润滑 自修复 

分 类 号：TH117.2[机械工程—机械设计及理论]