纳米氧化锌填充丁腈橡胶摩擦磨损机制研究  

Friction and Wear Mechanism of Nano-ZnO Filled NBR

作　　者：周杨京 何强 贾现召[1] 段明德[1] 梁玉龙 孔令豪 ZHOU Yangjing;HE Qiang;JIA Xianzhao;DUAN Mingde;LIANG Yulong;KONG Linghao(College of Mechanical and Electrical Engineering,Henan University of Science and Technology,Luoyang Henan 471003,China;Key Laboratory of Key Functional Parts of Machine of Anyang Institute of Technology,Anyang Henan 455000,China)

机构地区：[1]河南科技大学机电工程学院,河南洛阳471003 [2]安阳工学院机床关键功能部件重点实验室,河南安阳455000

出　　处：《润滑与密封》2019年第5期77-82,103,共7页Lubrication Engineering

基　　金：国家自然科学青年基金项目(51105002);河南省科技重点攻关项目(152102210196);国家科技重大专项(2012ZX04005-021);河南省教育厅科学技术研究重点项目(16A460001)

摘　　要：利用机械共混与热模压工艺制备四针氧化锌与纳米氧化锌填充丁腈橡胶(NBR),采用硫化仪和硬度仪分析2种氧化锌填充NBR材料的特性,采用CFT-I型多功能表面综合测试仪研究其在干摩擦条件下的摩擦磨损性能,采用三维形貌仪、SEM/EDS联用对磨损后橡胶表面进行分析,探讨氧化锌在NBR中的摩擦磨损机制。结果表明:与四针氧化锌相比,添加纳米氧化锌可使胶料的焦烧时间与正硫化时间缩短,且可使胶料密度和硬度增大;添加纳米氧化锌的胶料表现出优异的耐摩擦磨损性能,与添加四针氧化锌的胶料相比,其磨损量减少了45.8%,平均摩擦因数降低了2.4%;摩擦过程中纳米氧化锌磨屑堆积能够抵抗外界载荷压入胶料表面,致使摩擦因数存在骤然减小现象;含纳米氧化锌胶料磨损机制为磨料磨损与轻微的黏着磨损,而含四针氧化锌胶料的磨损机制为严重的磨粒磨损与黏着磨损。磨损表面元素分析表明,纳米氧化锌在胶料中Zn元素分布得更为均匀,在摩擦过程形成了致密摩擦膜。Nitrile butadiene rubber (NBR) materials filled by Tetra needle like ZnO whiskers (T-ZnOw) and nano ZnO (n-ZnO) were prepared by co mixing and heat molding,and the material properties of Nitrile butadiene rubber (NBR) containing different kinds of Zinc Oxide (ZnO) were analyzed.The friction and wear properties of the NBR com pound under different dry friction conditions were studied by CFT-I multi function surface comprehensive tester.The sur face of the NBR compound after wear was analyzed by using the three dimensional shape analyzer and SEM/ EDS,and the friction and wear mechanism of n-ZnO in NBR was discussed.The results indicate that,compared with the addition of T-ZnOw,the addition of n-ZnO can shorten the scorch time and the positive vulcanization time of the rubber compound, and increase the density and hardness of the rubber compound.The NBR filled with n-ZnO exhibits excellent properties of friction reducing and anti wear,and the wear amount is reduced by 45 8% and the average friction coefficient is reduced by 2 4% compared with the NBR filled with T-ZnOw.During the friction process,the n-ZnO debris accumulation can resist the external load into the rubber surface,resulting in a sudden decrease in the friction coefficient.The wear mecha nism of the NBR filled with n-ZnO is abrasive wear and slight adhesive wear,while the wear mechanism of the NBR filled with T-ZnOw is severe abrasive wear and adhesive wear.Elemental analysis of wear surface shows that the n-ZnO distrib utes more uniformly in the NBR compound,which forms a compact friction film during the friction process.

关 键 词：氧化锌 丁腈橡胶 摩擦磨损 干摩擦 

分 类 号：TH117.1[机械工程—机械设计及理论]