摘要
针对织物/树脂基自润滑衬垫酚醛树脂摩擦因数偏高、耐磨性能较弱的缺点,采用多级固化工艺与有机-无机杂化改性技术对酚醛树脂进行耐磨改性,研究固化工艺、无机纳米粒子含量与尺寸对自润滑衬垫摩擦性能的影响规律,并探讨无机纳米粒子对树脂的耐磨改性机制。结果显示:固化工艺为130℃/2 h+175℃/2 h时,织物衬垫剥离强度可达3.77 N/mm且热稳定性最好;当氧化锆质量分数和尺寸分别为8%和200 nm时,改性树脂的摩擦学性能最优,最大摩擦因数和平均摩擦因数分别为0.161和0.139,比纯树脂分别降低了52%和23%;改性后的织物衬垫耐磨性能得到显著提升,磨痕深度与宽度大幅下降,自润滑衬垫摩擦学性能最优,织物衬垫耐磨性能得到显著提升。研究分析显示,氧化锆耐磨改性机制主要为纳米粒子增强效应、应力诱导相变增韧与微裂纹增韧作用。
The phenolic resin used for fabric/resin based self-lubricating pads has the disadvantages of high friction coefficient and weak wear resistance.The multi-stage curing process and organic-inorganic hybrid modification technology were adopted to improve the wear resistance of the phenolic resin.The influence of curing process,inorganic nanoparticle content and size on the friction properties of self-lubricating pads were studied.The wear-resistant modification mechanism of inorganic nanoparticles on the resin was discussed.The results show that when the curing process is step-by step cured at 130 ℃ for 2 h and 175 ℃ for 2 h,the peeling strength of the fabric pads is 3.77 N/mm and the thermal stability is also the best.When the weight of nano-ZrO_(2) is 8% and size is 200 nm,the self-lubricating pad exhibits the best tribological performance.The maximum and average friction coefficients of the modified resin are 0.161 and 0.139,which are 52% and 23% lower than that of pure resin,respectively.The depth and width of the wear mark are also greatly reduced.Accordingly,the friction performance of fabric pads is significantly improved.Analysis shows that the wear resistance modification mechanism of ZrO_(2) mainly refers to the nanoparticle reinforcement effect,stress induced phase transformation toughening,and microcrack toughening effect.
作者
徐帆
杨宗阳
汪伟
黄雄荣
俞森龙
乔小兰
朱美芳
XU Fan;YANG Zongyang;WANG Wei;HUANG Xiongrong;YU Senlong;QIAO Xiaolan;ZHU Meifang(State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Materials Science and Engineering,Donghua University,Shanghai 201620,China;Military Representative Office of Army Military Representative Bureau in Shanghai,Shanghai 201801,China;Shanghai Bearing Technology Research Institute Co.,Ltd.,Shanghai 201801,China)
出处
《润滑与密封》
北大核心
2025年第1期98-104,共7页
Lubrication Engineering
关键词
自润滑衬垫
酚醛树脂
纳米氧化锆
自润滑轴承
摩擦性能
self-lubricating padding
phenolic resin
nano-ZrO2
self-lubricating bearing
friction properties
