石墨烯-聚苯胺复合氨敏膜的制备及应用  

Preparation and Application of Graphene-Polyaniline Composite Ammonia-Sensitive Film

作　　者：郭宁杰 太惠玲[1] 叶宗标[1] 谢光忠[1] 

机构地区：[1]电子科技大学光电信息学院电子薄膜与集成器件国家重点实验室,四川成都610054

出　　处：《高分子材料科学与工程》2015年第7期154-158,162,共6页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(61176066;61101031);教育部新世纪优秀人材资助项目(NCET-13-0096)

摘　　要：以石墨烯和苯胺为原料,采用原位自组装技术制备了石墨烯-聚苯胺(PANI)复合氨敏膜。利用紫外-可见光谱、扫描电镜对薄膜结构、微观形貌进行了表征;测试了基于复合薄膜的氨气传感器的响应性能;分析了薄膜与氨气分子的作用机理,并研究了石墨烯掺杂量和制备工艺对薄膜性能的影响。结果表明,石墨烯-聚苯胺复合薄膜对氨气具有良好的响应,其气敏特性明显优于单一的石墨烯薄膜和石墨烯/聚苯胺分层薄膜,分析认为石墨烯不仅为苯胺聚合提供了基体(成核模板),增大复合薄膜的比表面积,同时对聚苯胺具有掺杂作用,在复合薄膜中形成了π-π共轭结构。Using graphene and aniline as raw material,the graphene-polyaniline（PANI）composite ammoniasensitive film was prepared by in situ self-assembly method.The morphology and microstructure of the thin film were characterized by scanning electron microscopy（SEM）and UV-Vis spectroscopy.The NH3 sensing performance and mechanism of the nanocomposite film sensor were analyzed.The effects of graphene doping level and preparation process on properties of the film were investigated.The results reveal that the sensor based on graphene-polyaniline nanocomposite film exhibits good sensing properties,which is significantly better than the single graphene film and graphene- polyaniline layered films.The main reason is that graphene not only provides polymerized substrate for aniline（nucleating template）,increases specific surface area of the composite film,but also has a role of doping polyaniline,aπ-πconjugated structure is formed in the composite film.

关 键 词：石墨烯 聚苯胺 原位自组装 传感器 氨气 

分 类 号：TQ324.8[化学工程—合成树脂塑料工业]