电化学方法制备聚苯胺薄膜的生长过程研究  

Growth Process of Polyaniline Film Prepared by Electrochemical Reaction

作　　者：张卫国[1] 尚卫正 李香[1] 王宏智[1] 姚素薇[1] 

机构地区：[1]天津大学化工学院杉山表面技术研究室,天津300072

出　　处：《化学工业与工程》2014年第4期31-35,共5页Chemical Industry and Engineering

基　　金：天津市自然科学基金(11JCYBJC01900)

摘　　要：利用恒电位法、恒电流法、电位脉冲法,在酸性苯胺溶液中制备了聚苯胺薄膜。采用交流阻抗法(EIS)及扫描电镜(SEM)对聚苯胺生长过程进行了研究。实验结果表明,苯胺电聚合初期的生长为电化学动力学控制下的三维瞬时成核过程,整个聚合过程包括形核孕育期、电化学控制瞬间成核期、扩散控制瞬间成核期、一维径向连续成核期和一维轴向连续成核期5个特征区,生长过程可分为3个阶段,分别形成球状、网状纳米纤维和纳米棒结构。Potentiostatic,galvanostatic and potentiostatic pulse methods were used to prepare polyaniline film in acidic solution of aniline respectively.The growth process of the polyaniline on the electrode was characterized by electrochemical impedance spectroscopy（EIS） and scanning electron microscopy（SEM）.The results show that the initial polymerization of polyaniline is three-dimensional instantaneous nucleation dominated by electrochemical kinetics and the whole process is divided into five periods,including nucleation induction,electrochemically-controlled instantaneous nucleation,diffusion-controlled instantaneous nucleation,1-D radial continuous nucleation,1-D axial continuous nucleation.The nucleation and growth process of polyaniline is divided into three stages： the formation of the spherical particle,network nanofiber and nanorod structure.

关 键 词：聚苯胺 电化学 生长过程 微观形貌 

分 类 号：O646[理学—物理化学]