层层自组装原位聚合聚苯胺复合膜的氨敏性能研究  

Polyaniline Composite Films Fabricated by in-situ Polymerized and Layer-by-Layer Self-Assembled for NH_3 Gas Sensor

作　　者：刘萍云[1] 张长瑞[1] 冯坚[1] 马占东[1] 

机构地区：[1]国防科技大学航天与材料工程学院,长沙410073

出　　处：《传感技术学报》2007年第9期1952-1957,共6页Chinese Journal of Sensors and Actuators

基　　金：国防预研基金资助项目(51412010204KG0119)

摘　　要：利用原位聚合结合交替沉积自组装技术制备了多层聚苯胺(PANI)/聚苯乙烯磺酸钠(PSS)分子沉积膜,以紫外-可见光谱跟踪成膜过程,用场发射扫描透镜(FESEM)、原子力显微镜(AFM)对所合成的纳米膜进行了形貌表征.以自制的气体测试装置研究该膜对氨气的敏感特性,结果表明:敏感膜具有很好的响应性能,对浓度低至0.1mg/m3氨气,相对灵敏度可达63.47%,响应时间仅为39s.Polyaniline/ Poly （Sodium 4-Styrenesulfonate） （PANI/PSS） ultra-thin molecular deposition （MD） films were fabricated by in-situ polymerized and alternative adsorption. The formation process of ul- tra-thin films was characterized by UV-Vis. Field tomic force microscope （AFM） were employed to emission scanning electron microscope （FESEM） and acharacterize the morphology of as-prepared PANI/PSS nanofilms. Gas sensitivity of the ultra-thin films to NH3 was investigated using a special gas measure device. It was demonstrated that the relative sensitivity reached 63.47% and the response time was as quick as 39 s for 0. 1 mg/m^3 NH3 that showed high detecting sensibility.

关 键 词：敏感膜 聚苯胺复合膜 层层自组装 原位聚合 NH3 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置]