通过热处理提高聚四氟乙烯/聚甲基丙烯酸甲酯复合材料的耐磨性。

Heat treatment to improve the wear resistance of PTFE/PMMA composites.

作者信息

Gu Dapeng, Zhang Longxiao, Chen Suwen, Song Kefeng, Pan Deng, Yang Bingchao, Liu Shouyao

机构信息

School of Mechanical Engineering, Yanshan University Qinhuangdao 066004 China.

Aviation Key Laboratory of Science and Technology on Generic Technology of Self-Lubricating Spherical Plain Bearing, Yanshan University Qinhuangdao 066004 China.

出版信息

RSC Adv. 2019 Jul 18;9(39):22289-22294. doi: 10.1039/c9ra04362d. eCollection 2019 Jul 17.

DOI:10.1039/c9ra04362d

PMID:35519445

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9067079/

Abstract

Polytetrafluoroethylene/poly(methyl methacrylate) (PTFE/PMMA) composites were prepared by a self-curing method. The influence of heat treatment processes on the friction and wear behaviors of PTFE/PMMA composites against bearing steel balls were studied by a ball-on-disk tribometer. The thermal performance of PTFE/PMMA composites with heat treatment was analyzed by Thermogravimetric Analysis (TGA). The surface morphologies and element distribution of PTFE/PMMA composites in a PMMA matrix were detected by Field Emission Scanning Electron Microscopy (FE-SEM) and Energy Dispersive Spectroscopy (EDS). The results indicated that the wear rates of PTFE/PMMA composites with different heat treatments significantly declined compared with the unheated treatment composite. The wear rate of the PTFE/PMMA composite decreased firstly and then increased with molding temperature and time increasing, and reduced with the molding pressure increasing. The main wear mechanisms of PTFE/PMMA composites with different heat treatments were fatigue wear and abrasive wear.

摘要

采用自固化法制备了聚四氟乙烯/聚甲基丙烯酸甲酯（PTFE/PMMA）复合材料。利用销盘摩擦磨损试验机研究了热处理工艺对PTFE/PMMA复合材料与轴承钢球摩擦磨损行为的影响。通过热重分析（TGA）对经过热处理的PTFE/PMMA复合材料的热性能进行了分析。利用场发射扫描电子显微镜（FE-SEM）和能谱仪（EDS）检测了PMMA基体中PTFE/PMMA复合材料的表面形貌和元素分布。结果表明，与未经热处理的复合材料相比，不同热处理条件下PTFE/PMMA复合材料的磨损率显著降低。PTFE/PMMA复合材料的磨损率随成型温度和时间的增加先降低后升高，随成型压力的增加而降低。不同热处理条件下PTFE/PMMA复合材料的主要磨损机制为疲劳磨损和磨粒磨损。