摘要
采用酸氧化法对多壁碳纳米管(MWCNTs)进行表面修饰,并研究了基于MWCNTs/羟乙基纤维素(HEC)复合体系的结露传感特性。通过红外光谱和热失重分析对MWCNTs进行了结构表征。氧化处理有效提高了MWCNTs的分散性。基于改性MWCNTs的结露元件与本征MWCNTs的器件相比表现出更好的开关特性。结露元件在相对湿度(RH)为75%RH以前伴随湿度变化,电阻变化非常小,而在85%RH以后呈现电阻的非线性增大。MWCNTs在复合膜中的最佳质量分数约为22 wt%,在100%RH下灵敏度达到31。
The new dew sensor based on functionalized multiwall carbon nanotubes （MWCNTs）/hydroxyethyl cellulose （HEC） composite material through acidic agents were researched. Infrared spectroscopy and thermogravimetric analysis were used to character the structure of the resultant MWCNTs. The chemical treatment improved the dispersibility of MWCNTs effectively. The resistance of dew sensors remained almost unchanged below 75% RH and increased sharply over 85% RH. The chemically treated MWCNTs/HEC composite film with a loading of 22 wt% MWCNTs showed excellent switching characteristics,with a sensitivity of 31 at 100% RH.
出处
《传感技术学报》
CAS
CSCD
北大核心
2013年第3期302-306,共5页
Chinese Journal of Sensors and Actuators
基金
国家自然科学基金项目(51103053)
中国博士后科学基金项目(2011M500608)
教育部博士点基金项目(20110061120053)
关键词
结露传感器
多壁碳纳米管
复合膜
羟乙基纤维素
dew sensor
multiwall carbon nanotubes
composite film
hydroxyethyl cellulose
