表面修饰三氧化钨填充聚四氟乙烯复合材料的制备及其性能研究  

Preparation and properties of surface⁃modified tungsten trioxide⁃filled polytetrafluoroethylene composites

作　　者：林煦航 钱善华 张炜 卞达 倪自丰 LIN Xuhang;QIAN Shanhua;ZHANG Wei;BIAN Da;NI Zifeng(School of Mechanical Engineering,Jiangnan University,Wuxi 214122,China;Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology,Wuxi 214122,China)

机构地区：[1]江南大学机械工程学院,江苏无锡214122 [2]江苏省食品先进制造装备技术重点实验室,江苏无锡214122

出　　处：《中国塑料》2024年第4期6-12,共7页China Plastics

基　　金：2023年江苏省研究生科研与实践创新计划项目(SJCX23_1234);江苏省食品先进制造装备技术重点实验室自主研究课题资助项目(FMZ202204);国家自然科学基金项目(52375184)。

摘　　要：为提升聚四氟乙烯(PTFE)的耐磨性能,开展γ⁃缩水甘油醚氧丙基三甲氧基硅烷(硅烷偶联剂KH560)表面修饰和未经表面修饰的纳米三氧化钨(nano⁃WO_(3))填充的PTFE复合材料性能研究。通过冷压烧结法制备PTFE/nano⁃WO_(3)复合材料,采用材料试验机和磨损试验机分别研究复合材料的力学及摩擦学性能,探讨nano⁃WO_(3)的含量和表面修饰对复合材料性能的影响。结果表明,KH560接枝到nano⁃WO_(3)的表面,提高nano⁃MWO_(3)与PTFE基体的相容性;与PTFE/nano⁃WO_(3)相比,nano⁃MWO_(3)能够改善PTFE的力学性能;其中PTFE/5%nano⁃MWO_(3)的性能较好,与PTFE相比,拉伸强度降低了17.7%,但断裂伸长率提升了43.5%,弯曲强度提升了16.1%;与PTFE/nano⁃WO_(3)和PTFE相比,nano⁃MWO_(3)能够改善PTFE的耐磨性能;其中PTFE/5%nano⁃MWO_(3)的性能较好,与PTFE相比,对应的摩擦因数和磨损率分别降低了14.2%和73.4%,其研究结果将为PTFE工程应用和新材料研发提供较好的技术参考。To improve the wear resistance of polytetrafluoroethylene(PTFE),KH560⁃surface⁃modified and non⁃surface⁃modified tungsten trioxide(WO_(3))filled polytetrafluoroethylene composites were comparatively studied.The PTFE/na⁃no⁃WO_(3)composites were prepared through cold pressing and sintering,and their mechanical and tribological properties were investigated by using material testing and wear testing machines.The effects of nano⁃WO_(3)content and surface mod⁃ification on the properties of the composites were also investigated.The results indicated that grafting KH560 on the sur⁃face of nano⁃WO_(3)improved the compatibility between the PTFE matrix and modified nano⁃WO_(3)and thus improved the mechanical properties of the PTFE/nano⁃WO_(3)composites.Compared to pure PTFE,the composite containing 5 wt%modified nano⁃WO_(3)showed a decrease in tensile strength by 17.7%,but an increase in elongation at break increased by 43.5%and in bending strength by 16.1%.Compared to the composites with unmodified nano⁃WO_(3),the introduction of modified nano⁃WO_(3)effectively improved the wear resistance of PTFE.The friction coefficient and wear rate of the composite containing 5 wt%modified nano⁃WO_(3)were reduced by 14.2%and 73.4%,respectively,compared to those of pure PTFE.The findings of this work will provide a technical reference for the application of PTFE and the research and development of new materials.

关 键 词：纳米三氧化钨 聚四氟乙烯 表面修饰 耐磨性能 拉伸性能 

分 类 号：TQ325.4[化学工程—合成树脂塑料工业]