臭氧刻蚀改性Nomex/PTFE织物复合材料界面性能及摩擦学性能  

Interface and Tribological Properties of O3-eteched Nomex/PTFE Fabric Composites

作　　者：李佩隆 张招柱[1,2] 杨明明 袁军亚 姜葳 LI Peilong;ZHANG Zhaozhu;YANG Mingming;YUAN Junya;JIANG Wei(State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou Gansu 730000,China;College of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院兰州化学物理研究所,固体润滑重点实验室,甘肃兰州730000 [2]中国科学院大学材料科学与光电技术学院,北京100049

出　　处：《润滑与密封》2022年第10期1-8,共8页Lubrication Engineering

基　　金：国家自然科学基金项目(52005487,52075523)。

摘　　要：为提高Nomex/PTFE混编织物增强复合材料的界面性能和摩擦学性能,选用臭氧刻蚀改性方法对Nomex纤维和PTFE纤维进行表面改性,采用扫描电子显微镜(SEM)、接触角测定仪和能谱仪(EDS)研究臭氧刻蚀时间下纤维的表面形貌和官能团变化,采用多试件摩擦磨损试验机测试Nomex/PTFE织物复合材料的摩擦学性能,采用SEM和能谱仪(EDS)表征复合材料和对偶的磨损面。结果表明:臭氧刻蚀能够明显改变Nomex纤维和PTFE纤维的表面形貌,提高纤维的亲水性和与树脂的黏接性能,但会降低其力学性能;臭氧刻蚀处理后复合材料的界面性能和耐磨损性能有所提高,最优处理时间为1 h,磨损率可降低16.7%~20%。原因在于纤维表面粗糙度和含氧官能团的增加有利于提高纤维与树脂的界面结合强度,并减少作用力在材料界面上的应力集中效应。In order to improve the interface and tribological properties of Nomex/PTFE hybrid fabric reinforced composite, the ozone oxidation was chosen to modify the surface of Nomex fiber and PTFE fiber.Effect of ozone treatment time on the morphologic and functional groups of Nomex and PTFE fiber were measured by scanning electron microscopy(SEM),energy-dispersive X-ray spectroscopy(EDS) and contact angle tester.The tribological properties of Nomex/PTFE hybrid fabric reinforced composite were evaluated by multi-specimen test machine and the worn surface of specimen and contact-pin were characterized by SEM and EDS.The test results indicate that the surface morphology of Nomex and PTFE fiber composite, the hydrophilicity of the fiber and the adhesion with the resin are significantly improved by ozone oxidation.However, the mechanical property of Nomex and PTFE fiber is reduced.The interface and tribological properties of the composite are improved after ozone oxidation and the optimal treatment time is 1 h.The wear rate is reduced by 16.7% to 20%.The ozone oxidation increases the surface roughness and the oxygen-containing functional group content of Nomex and PTFE fiber, which is beneficial to enhance the interfacial adhesion between fiber and resin, and reduce the stress concentration effect of the applied load on the fiber resin interface.

关 键 词：臭氧刻蚀 NOMEX纤维 PTFE纤维 黏接性能 摩擦学性能 

分 类 号：TH117[机械工程—机械设计及理论]