纳米ZrO_(2)增强PEEK/PTFE复合材料摩擦行为分子动力学模拟  

Molecular Dynamics Simulation of Friction Behavior of Nano-ZrO_(2)Reinforced PEEK/PTFE Composites

作　　者：党亚朋 汤赫男[1] 王明辉 刘林[1] DANG Yapeng;TANG Henan;WANG Minghui;LIU Lin(School of Mechanical Engineering,Shenyang University of Technology,Shenyang Liaoning 110870,China)

机构地区：[1]沈阳工业大学机械工程学院,辽宁沈阳110870

出　　处：《润滑与密封》2024年第9期59-63,共5页Lubrication Engineering

基　　金：辽宁省教育厅基本科研项目(面上项目)(LJKMZ20220458)。

摘　　要：为了从微观结构探究和揭示纳米二氧化锆(ZrO_(2))对聚醚醚酮(PEEK)/聚四氟乙烯(PTFE)复合材料摩擦行为的影响,在10%PEEK/PTFE复合材料中,分别添加质量分数4%、6%、8%、10%的纳米ZrO_(2),制备4种纳米ZrO_(2)填充PEEK/PTFE复合材料,并基于分子动力学(MD)方法构建4种复合材料与铁对摩的摩擦模型。结果表明:适量纳米ZrO_(2)可增强PEEK/PTFE复合材料分子链抵抗剪切变形的能力,在聚合物分子链之间形成较强的范德华力,改善了PEEK/PTFE复合材料摩擦性能;纳米ZrO_(2)在摩擦过程中能有效抑制层间滑移现象,在复合材料中起到吸附聚合物分子链的作用,增强了原子间相互作用,阻碍摩擦过程分子链内部滑移;其中质量分数6%纳米ZrO_(2)填充的复合材料摩擦性能最佳。In order to explore and reveal the effect of nanometre zirconium dioxide(ZrO_(2))on the friction behavior of polyetheretherketone(PEEK)/polytetrafluoroethylene(PTFE)composites from the microstructure,four kinds of nano-ZrO_(2) filled PEEK/PTFE composites were prepared by adding mass fraction 4%,6%,8%,and 10%nano-ZrO_(2) to 10%PEEK/PTFE composite materials,respectively.Based on the molecular dynamics(MD)method,the friction models of PEEK/PTFE composites with different mass fractions of nano-ZrO_(2) sliding against iron were constructed.The results show that an appropriate amount of nano-ZrO_(2) can enhance the shear deformation resistance of PEEK/PTFE composite molecular chains,form strong van der Waals force between polymer molecular chains,and improve the friction properties of PEEK/PTFE composites.Nano-ZrO_(2) can effectively inhibit interlayer slip during friction,play a role in adsorbing polymer molecular chains in composites,so as to enhance interatomic interactions,and hinder internal slip of molecular chains during friction.The composites with mass fraction 6%nano-ZrO_(2) show the best friction performance.

关 键 词：聚四氟乙烯 聚醚醚酮 纳米二氧化锆 分子动力学 摩擦性能 

分 类 号：TH117.1[机械工程—机械设计及理论]