碳纳米管水泥基复合材料温敏及湿敏性能研究  

Study on Temperature and Humidity Sensitivity of Carbon Nanotube/Cement Composite(CNT/CC)

作　　者：袁娇 刘小艳[1] 陈玉泉[1] 马文莉 李田雨[1] 江波 揭汉铎 YUAN Jiao;LIU Xiao-yan;CHEN Yu-quan;MA Wen-li;LI Tian-yu;JIANG Bo;JIE Han-duo(College of Mechanics and Materials,Hohai University,Nanjing,210098,China)

机构地区：[1]河海大学力学与材料学院

出　　处：《混凝土与水泥制品》2020年第4期5-8,共4页China Concrete and Cement Products

基　　金：国家自然科学基金（51009057、51879093）;江苏省科技计划项目（BE2015706）;南京市水务科研项目

摘　　要：将碳纳米管(CNTs)作为导电填料制备了碳纳米管水泥基复合材料(CNT/CC),分别研究了CNT/CC在不同温度、湿度下的电阻率变化规律,探讨其作为本征型温、湿度传感器的可行性。结果表明,试件在25~55℃区间内具有较好的温敏性,CNTs掺量为0.5%的CNT/CC试件单位温度内电阻率变化率在1.5%以上,且在升温和降温条件下,电阻率变化率随温度线性变化的相关系数分别为-0.950和-0.984;试件内部含水率在0.6%~6.0%时的湿敏性能最佳,且CNTs掺量为0.5%的试件电阻率变化率最大,达到91.2%。Carbon nanotubes(CNTs)were used as conductive fillers to fabricate carbon nanotube/cement composite(CNT/CC).By studying the change rate of resistivity under different temperature and humidity,whether CNT/CC could be able to make an intrinsic temperature and humidity sensor was discussed.The results show that specimens have good temperature sensitivity between 25℃and 55℃,the change rate of resistivity comes up to 1.5%/℃.When CNT/CC containing 0.5%CNTs is heated up and cooled down,the linear coefficient is-0.950 and-0.984 respectively.Specimens have the best humidity sensitivity when water content is between 0.6%and 6.0%.While adding 0.5%CNTs,the change rate of resistivity is 91.2%,which reaches the maximum value.

关 键 词：碳纳米管 温敏性能 湿敏性能 电阻率变化率 

分 类 号：TU528.45[建筑科学—建筑技术科学]