碳纳米管对天然橡胶复合材料高频动态性能的影响  

Influence of Carbon Nanotubes on High\|frequency Dynamic Properties of Natural Rubber Composites

作　　者：翁爽 陆伟强 任睿[1] 沈东明 黄海波[1] WENG Shuang;LU Weiqiang;REN Rui;SHEN Dongming;HUANG Haibo(Faculty of Mechanical Engineering and Mechanics,Ningbo University,Ningbo 315211,China;Ningbo Tuopu Group Co.,Ltd.,Ningbo 315800,China)

机构地区：[1]宁波大学机械工程与力学学院,宁波315211 [2]宁波拓普集团股份有限公司,宁波315800

出　　处：《机械工程材料》2024年第3期8-13,共6页Materials For Mechanical Engineering

基　　金：中国(宁波)创新挑战赛优胜项目(2022T007);国家自然科学基金资助项目(51975300)。

摘　　要：以0.5份(每100质量份天然橡胶中添加的质量份)碳纳米管(CNTs)替换基础配方中不同份数(0,2,4,6,8)炭黑制备天然橡胶复合材料,研究了碳纳米管对天然橡胶复合材料静态力学性能和高频动态性能的影响。结果表明:随着CNTs替换炭黑份数的增加,复合材料的硬度降低,拉伸强度先升后降再升,断裂伸长率先降再增,100%定伸应力先增后降;用0.5份替换2份炭黑后的复合材料的综合静态力学性能最佳,此时拉伸强度和100%定伸应力均最大,分别比未用CNTs替换炭黑的复合材料提升13.52%和8.47%。随着CNTs替换炭黑份数的增加,复合材料动刚度均方根呈先减后增的趋势,替换2份炭黑后的复合材料动刚度均方根最小,比未用CNTs替换炭黑复合材料的动刚度均方根降低了12.94%,此时复合材料具有最好的高频动态性能,拉伸强度和定伸应力与高频动态性能正相关,断裂伸长率和硬度与高频动态性能的相关度不显著。Natural rubber composites were prepared by replacing 0,2,4,6,8 part(mass parts per 100 mass parts of natural rubber)carbon black with 0.5 part carbon nanotubes(CNTs)in the basic formula.The effects of CNTS on the static mechanical properties and dynamic properties of natural rubber composites were investigated.The results show that with the increase of carbon black parts replaced by CNTs,the hardness of composites decreased,the tensile strength increased first and then decreased and then increased,the fracture elongation decreased first and then increased,and the 100%constant elongation stress increased first and then decreased.The composite static mechanical properties of the composites after replacing 2 part carbon black with 0.5 part CNTs were the best,and the tensile strength and 100%constant elongation stress were both the highest,which were 13.52%and 8.47%higher than those of the composite without replacing carbon black with CNTs,respectively.With the increase of the parts of carbon black replaced by CNTs,the root mean square of dynamic stiffness of the composites decreased first and then increased.The root mean square of dynamic stiffness of the composite after replacing 2 part carbon black with 0.5 part CNTs was the smallest,which was 12.94%lower than that without replacing carbon black with CNTs.In this case,the composites had the best high-frequency dynamic properties.The tensile strength and 100%constant elongation stress were positively correlated with high-frequency dynamic properties,while fracture elongation and hardness were not significantly correlated with high-frequency dynamic properties.

关 键 词：天然橡胶复合材料 碳纳米管 高频动态性能 动刚度 静态力学性能 

分 类 号：TH145.4[一般工业技术—材料科学与工程]