氨气检测的聚苯胺碳纳米管复合敏感膜的研究与应用  

The Research and Application of Polyaniline/Multi-Walled Carbon Nanotubes Composite Sensitive Membrane for Ammonia Gas Detection

作　　者：李春香[1] 陈大竞[1] 陈玮[1] 陈裕泉[1] 潘敏[1] 

机构地区：[1]浙江大学生物传感器国家专业实验室生物医学工程系,杭州310027

出　　处：《传感技术学报》2012年第3期302-305,共4页Chinese Journal of Sensors and Actuators

基　　金：基于物联网的低成本气敏传感器芯片技术研究及应用(2010XZZX002-5);农村物联网综合信息服务科技工程(2012BAD35B00)

摘　　要：本文介绍了基于聚苯胺及多壁碳纳米管复合材料的氨气传感器的制备与测试,使用原位聚合法使苯胺单体以碳纳米管为核心进行聚合反应,运用介电泳法制备得聚苯胺/多壁碳纳米管气敏复合膜传感器。该传感器对10×10-6氨气的响应灵敏度为3.4,响应时间15 s,而对比实验中聚苯胺膜传感器的灵敏度为1.9。实验结果表明,由于碳纳米管在介电泳过程中构建的大比表面积纳米三维结构和优良的导电率,纳米复合材料的微观结构和导电性能都得到大幅改善,从而使得复合物具有相对于纯聚苯胺膜更好的气敏特性。Carbon nanotube and Polyaniline （Pani）composite for gas sensing were investigated in this paper. Pani coated multiwalled carbon nanotube （MWNT） was synthesized by means of in-sure polymerization and dielectrophoresis. The nano-composite sensor showed a 3.4 reversible resistance change to 10× 10^-6 NH3 with a response time of 15 s while the sensitivities of Pani film sensor is 1.9 in the contrast experiment. The results indicate that the nano-composite sensitivity and sensing dynamic are improved due to the nanostructure with ultra-high surfacevolume ratio and good conductivity. The mechanism of sensitivity to NH3 of the sensor was also discussed.

关 键 词：聚苯胺 碳纳米管 原位聚合 气体传感 

分 类 号：TP212.3[自动化与计算机技术—检测技术与自动化装置]