Nano-SiO_(2)及PA6复合改性PE-UHMW的摩擦磨损性能研究  

Friction and wear properties of PE-UHMW modified with nano-SiO_(2) and PA6

作　　者：许荣霞 魏刚[1] 魏莉岚 吴洁萃 蒋雨江 XU Rongxia;WEI Gang;WEI Lilan;WU Jiecui;JIANG Yujiang(College of Material Science&Engineering,Xihua University,Chengdu 610039,China)

机构地区：[1]西华大学材料科学与工程学院,成都610039

出　　处：《中国塑料》2022年第4期47-52,共6页China Plastics

基　　金：教育部春晖计划项目资助(Z2011079)。

摘　　要：采用电子万能试验机、M-2000型摩擦试验机、电子和光学显微镜等测试分析方法,重点考察了纳米二氧化硅(nano-SiO_(2))及其与聚酰胺6(PA6)复合对超高分子量聚乙烯(PE-UHMW)摩擦磨损性能的影响。结果表明,随着nano-SiO_(2)用量的增加,PE-UHMW复合材料的摩擦因数和磨损率均呈现出先降低后升高的趋势;当nano-SiO_(2)含量为2%时,复合材料具有最低的摩擦因数和磨损率;在nano-SiO_(2)含量为2%基础上添加8%的PA6时,复合材料表现出更低的摩擦因数和磨损率,分别为0.29和0.33×10^(-9)g/(N·m);添加nano-SiO_(2)有效抑制了PE-UHMW的黏着磨损和塑性变形,适量nano-SiO_(2)和PA6复合改性PE-UHMW形成了更加均匀致密的自润滑转移膜,磨损面变得更加平整光滑,表现为非常轻微的磨粒磨损特征。The effects of nano-SiO_(2)and its composites with polyamide 6 on the tribological properties of ultra-high molecular weight polyethylene(PE-UHMW)were investigated using electronic universal testing machine,M-2000 friction testing machine,electron and optical microscope.The results indicate that the friction coefficient and wear rate of PE-UHMW composites decreased at first and then tended to increase with an increase in the nano-SiO_(2)content.The composites exhibited the lowest friction coefficient and wear rate at a nano-SiO_(2)content of 2 wt%.When 8 wt%polyamide 6 was added into the PE-UHMW composite containing 2 wt%nano-SiO_(2),the composites obtained a low friction coefficient of 0.29 and a low wear rate of 0.33×10^(-9)/(N·m).The wear mechanism analysis indicated that the addition of nano-SiO_(2)could effectively inhibit the adhesive wear and plastic deformation of PE-UHMW,and PE-UHMW composite with appropriate nano-SiO_(2)and polyamide 6 can form a more uniform and compact self-lubricating transfer film,and the wear surface becomes more smooth and present a very slight abrasive wear characteristics.

关 键 词：超高分子量聚乙烯 纳米二氧化硅 聚酰胺6 摩擦 磨损 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]