CNT/EP复合材料应变传感器的实验研究  

Experimental Study of the CNT/EP Composite Strain Sensor

作　　者：黄楷焱[1] 童疏影 陈泽芸[1] 袁卫锋[1] 

机构地区：[1]西南科技大学制造科学与工程学院,四川绵阳621010

出　　处：《机械设计与制造》2017年第1期149-151,155,共4页Machinery Design & Manufacture

基　　金：国家自然科学基金项目(11472232);绵阳市科技计划项目(14G-06-3)

摘　　要：将碳纳米管(CNT)均匀分散在环氧树脂(EP)基体中,在一定温度下固化后可制得CNT/EP导电复合材料,其导电率随CNT含量的升高而升高。通过实验研究CNT/EP复合材料拉伸应变与其电阻之间的关系,将CNT/EP复合材料制成片状贴附于有机玻璃板材拉伸试样上,采用CMT-05型万能拉伸试验机对其进行拉伸试验,同时使用LCR测试样品的实时电阻。实验显示,复合材料薄片的电阻随应变的增加而增大,但增大的幅度与CNT含量有关,因此,可以利用CNT/EP复合材料薄片的这种力-电特性制造应变传感器。研究表明,试制的CNT含量为0.2%的复合材料应变传感器灵敏度最好,可比传统箔式应变传感器的灵敏度高5倍以上。CNT/EP conductive composite can be obtained by solidifying the mixture of carbon mmotube（ CNT ）and epoxy （EP） at specific temperatures.The conductivity of the CNT/EP composite rises as the CNT content increases.The present research aims to investigate the relationship between the resistance of the composite and the tension strain. In the experiment, the film specimens made of this composite were stretched using a CMT-05 universal tensile machine and their transient resistances were measured by a LCR analyser.lt is observed that the resistance of a CNT/EP composite film increases when the strain becomes larger, and the increasing speed is dependant on the CNT content.Therefore ,such a mechanical-electrical behaviour can be used to make strain sensors.Through the present study, it is found that the composite sensors with 0.2% CNT content have the highest sensitivity which is five times higher than that of the conventional metal foil strain gauges.

关 键 词：碳纳米管(CNT) 环氧树脂(EP) 复合材料 应变传感器 灵敏度 

分 类 号：TH16[机械工程—机械制造及自动化]