摘要
采用分子动力学模拟技术,从分子水平研究碳纳米管(CNTs)增强丁腈橡胶(NBR)复合材料的力学性能及摩擦学性能。运用恒应变法计算材料的力学性能,分别建立纯NBR和CNTs/NBR复合材料的3层模型,并对顶层和底层的铁摩擦副施加剪切载荷,研究材料的摩擦学性能。研究结果表明:在摩擦过程中,由于CNTs表面存在很强的吸附力,抑制了NBR分子链的迁移率,使得CNTs和聚合物分子链间的相互作用增强;CNTs/NBR复合材料具有更高的致密性以及更强的结构,从而表现出了比纯NBR更加优异的力学和摩擦学性能。
The mechanical and tribological properties of CNTs reinforced nitrile butadiene rubber(NBR)composites were studied at molecular level by molecular dynamics simulation.The mechanical properties of materials were calculated by constant strain variation method.Three-layer models of pure NBR and CNTs/NBR composites were established respectively,and shear loads were applied to the iron friction pairs at the top and bottom layers to study the tribological properties of the materials.The results show that in the process of friction,due to the strong adsorption capacity on the surface of CNTs,the migration rate of NBR molecular chain is inhibited,and the interaction between CNTs and polymer molecular chain is enhanced.CNTs/NBR composites have higher density and stronger structure,which shows more excellent mechanical and tribological properties compared with pure NBR.
作者
唐黎明
王新楠
纪平
何恩球
TANG Liming;WANG Xinnan;JI Ping;HE Enqiu(School of Mechanical and Power Engineering,Shenyang University of Chemical Technology,Shenyang Liaoning 110142,China;School of Mechanical Engineering,Shenyang University of Technology,Shenyang Liaoning 110870,China)
出处
《润滑与密封》
CAS
CSCD
北大核心
2022年第8期21-26,共6页
Lubrication Engineering
基金
辽宁省自然科学基金指导计划项目(20180550640)
辽宁省教育厅项目(LJ2020018)。
关键词
碳纳米管
丁腈橡胶
力学性能
摩擦学性能
分子动力学模拟
carbon nanotubes
nitrile butadiene rubber
mechanical properties
tribological property
molecular dynamics simulation
