恒电位脉冲法制备聚苯胺薄膜及其表征

采用恒电位脉冲法制备聚苯胺薄膜, 利用扫描电子显微镜(SEM)、红外光谱(IR)、X射线衍射(XRD)及荧光光谱对所制备的薄膜进行比较与表征. 分别考察了循环周期、占空比及脉冲时间对薄膜形貌的影响. SEM形貌分析结果表明, 随着占空比的减小, 聚苯胺薄膜表面颗粒细化; 随循环周期的增加, 聚苯胺薄膜由片层结构转变为纵向生长的颗粒状结构. 荧光光谱分析结果表明, 聚苯胺薄膜具有光致发光性能, 发射峰位置约520 nm, 且发光强度随占空比的增大而增强. 电化学性能测试结果表明, 恒电位脉冲电位法制备的聚苯胺薄膜具有良好的电容特性.

Preparation and Characterization of Polyaniline Film by Potentiostatic Pulse Method

The polyaniline(PANI) films were prepared by constant potential pulse method.The morphology,structure and optic properties of the films were characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD),infrared ray(IR) and luminescence spectrum.We investigated the impact of duty cycle,cycle and pulse time on the morphology of films.The SEM images show that the grain size of films decreases with the decreases of the duty cycle;with the increase of cycles,the lamellar structure films change to granular structure which is longitudinal growth.The luminescence spectrum revealed that the emitting peak of the PANI films located at about 520 nm,and the luminescent intensity increases with the increase of the duty cycle.Electrochemical performance test shows that the PANI films which prepared by constant potential pulse method has good capacitive characteristics.