不同纤维增强丁腈橡胶性能的分子动力学对比研究  

Molecular dynamics comparative study on properties of different fiber-reinforced nitrile rubbers

作　　者：苏禹豪 李云龙 王世杰[1] 聂瑞 SU Yu-hao;LI Yun-long;WANG Shi-jie;NIE Rui(School of Mechanical Engineering,Shenyang University of Technology,Shenyang 110870,China;Ningbo Institute of Technology,Beihang University,Ningbo 315800,China)

机构地区：[1]沈阳工业大学机械工程学院,沈阳110807 [2]北京航空航天大学宁波创新研究院,浙江宁波315800

出　　处：《合成橡胶工业》2024年第6期470-475,共6页China Synthetic Rubber Industry

基　　金：辽宁省科技厅应用基础研究计划项目(青年专项)(2023 JH 2/101600065);国家自然科学基金资助项目(52105062,51903148);广东省基础与应用基础研究基金资助项目(2021 A 1515012273);北京航空航天大学宁波创新研究院青年基金资助项目(NBQN 202106002)。

摘　　要：使用分子动力学模拟构建了纤维表面模型和复合材料模型,通过纤维拔出模拟和横向拉伸模拟对复合材料界面结合性能和力学性能进行测试,从微观角度分析了不同纤维与丁腈橡胶(NBR)基体的界面作用,比较了玻璃纤维(GF)、玄武岩纤维(BF)和聚乙烯纤维(PE)对NBR基体的增强效果,探讨了影响界面结合性能的作用机制。结果表明,GF与NBR基质间表现出最强的界面相互作用,在拔出过程中GF可吸附最多的NBR分子链,其次是BF,但二者之间差异不大,而PE与NBR间的界面相互作用最弱,通过添加GF可解决复合材料抗撕裂性能不足的问题;对于BF/NBR复合材料而言,BF自身的高强度可以更好地增强复合材料在纤维方向上的力学性能,在工程应用中可将BF沿外力方向排列,从而增强复合材料抵抗变形失效的能力。Fiber surface model and composite model were constructed by molecular dynamics si-mulation,the interfacial bonding performance and mechanical properties of the composites were tested by fiber pull-out simulation and transverse tensile simulation,the interfacial interaction between diffe-rent fibers and nitrile rubber(NBR)matrix was analyzed from a microscopic perspective,the reinforcement effects of glass fiber(GF),basalt fiber(BF)and polyethylene fiber(PE)on the NBR matrix were compared,and the mechanism affecting the interface bonding performance was discussed.The results indicated that the interfacial interaction between GF and NBR matrix was the strongest,and GF could adsorb the most NBR molecular chains during the pull-out process,followed by BF,but there was little difference between GF and BF,while the interfacial interaction between PE and NBR matrix was the wea-kest,and the problem of insufficient tear resistance of the composites could be solved by the addition of GF.For BF/NBR composite,the higher strength of BF itself could better enhance the mechanical pro-perties of the composite in the fiber direction,and in engineering applications,BF could be arranged along the direction of external force to enhance the ability of the composite to resist deformation failure.

关 键 词：纤维 丁腈橡胶 增强 分子动力学模拟 力学性能 界面结合性能 

分 类 号：TQ333.7[化学工程—橡胶工业]