摘要
制备了一种多壁碳纳米管改性天然橡胶复合材料,制备过程中通过加入表面活性剂十六烷基三甲基溴化铵(CTAB)改善碳纳米管在橡胶基体中的分散性能,降低了碳纳米管含量的渗流阈值,更有效地构建导电网络。通过实验研究发现复合材料的拉伸强度和刚度随碳纳米管含量增加而上升;材料的电阻/应变敏感因子在碳纳米管含量4%时最高;材料在循环载荷作用下,电阻和应变保持同步变化,并在一定循环次数后达到稳定,表现出高灵敏、高稳定的响应特性,证明该复合材料适用于大变形构建的应变监测与传感。
In this study,a multi-walled carbon nanotube-modified natural rubber composite was prepared.The preparation process improved the dispersion performance of carbon nanotubes in the rubber matrix by adding the surfactant cetyltrimethylammonium bromide(CTAB),which reduced the percolation threshold of carbon nanotube content and built the conductive network more effectively.The tensile strength and stiffness of the composites were found to increase with the increase of carbon nanotube content through experimental studies;the resistance/strain sensitivity factor of the material was highest at 4%of carbon nanotube content;the resistance and strain of the material maintained synchronous changes under cyclic loading and reached stability after a certain number of cycles,showing highly sensitive and stable response characteristics,proving that the composites are suitable for strain of large deformation construction.It is proved that the composite material is suitable for strain monitoring and sensing of large deformation construction.
作者
姚铮
杨洋
郭荣鑫
刘兴姚
刘荟
YAO Zheng;YANG Yang;GUO Rongxin;LIU Xingyao;LIU Hui(School of Construction Engineering,Kunming University of Technology,Yunnan Provincial Key Laboratory of Civil Engineering Disaster Prevention,650500 Kunming,China)
出处
《应用力学学报》
CAS
CSCD
北大核心
2023年第3期604-610,共7页
Chinese Journal of Applied Mechanics
基金
国家自然科学基金资助项目(No.11962009)
昆明理工大学分析测试基金资助项目(No.2019M20182110015)。
关键词
电阻/应变响应
橡胶基复合材料
碳纳米管
表面活性剂
大变形监测
resistance/strain response
rubber matrix composites
carbon nanotube
surfactant
large deformation monitoring
作者简介
通信作者:杨洋,教授。E-mail:yangyang0416@kmust.edu.cn。
