摘要
采用分子模拟的方法研究了纳米ZnO/丁腈橡胶(NBR)复合材料的摩擦学行为,考察了纳米ZnO/NBR复合材料的回转半径、原子相对浓度和剪切行为,探讨了纳米ZnO/NBR复合材料摩擦学行为的微观机制。结果表明:与纯NBR材料相比,纳米ZnO/NBR复合材料具有更小的回转半径,橡胶分子链的柔顺性下降;与纳米ZnO/NBR复合材料相比,纯NBR材料摩擦界面具有更高的原子相对浓度,纯NBR材料上下摩擦表面的原子浓度峰值比纳米ZnO/NBR复合材料分别高了6.4%和4.3%。说明纳米ZnO的存在提高了纳米ZnO/NBR复合材料分子链的刚性,减小了能量耗散,从而改善了纳米ZnO/NBR复合材料的摩擦性能。
The tribology behavior of nano ZnO/nitrile-butadiene rubber(NBR)composites was studied by molecular simulation.The investigation was conducted using molecular simulation to examine the radius of gyration,relative concentration of atom and shear behavior of nano ZnO/NBR composites.The microscopic mechanism of tribology behavior of nano ZnO/NBR composites was discussed.The results show that compared with the pure NBR,the nano ZnO/NBR composites owns a smaller radius of gyration and the flexibility of rubber molecular chain is decreased.Compared with the nano ZnO/NBR composites,the pure NBR owns a higher relative concentration of atom at the frictional interface.The peak value of relative concentration of atom at the top and bottom friction surface of pure NBR is 6.4%and 4.3%greater than that of nano ZnO/NBR composites,respectively.The rigidity of molecular chain in nano ZnO/NBR composites is enhanced and the energy dissipation is decreased.The improved tribology property is achieved in the nano ZnO/NBR composites.
作者
唐黎明
李云龙
何恩球
郝敏
任师兵
TANG Liming;LI Yunlong;HE Enqiu;HAO Min;REN Shibing(School of Energy and Power Engineering,Shenyang University of Chemical Technology,Shenyang 110142,China;College of Engineering,Shantou University,Shantou 515063,China;School of Mechanical Engineering,Shenyang University of Technology,Shenyang 110870,China;College of Science,Shenyang Agricultural University,Shenyang 110866,China)
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2020年第3期690-695,共6页
Acta Materiae Compositae Sinica
基金
辽宁省自然科学基金指导计划项目(20180550640)
大学生创新创业训练计划项目(201810149011)
汕头大学科研启动基金资助项目(NTF19018)
作者简介
通信作者:李云龙,博士,讲师,研究方向为纳米高分子复合材料的机械与摩擦学性能,E-mail:yunlongli@stu.edu.cn
