Effects of synthetic conditions of pulse galvanostatic method on electroactivity of polyaniline  

作　　者：周海晖 焦树强 李松林 罗胜联 魏万之 旷亚非 

机构地区：[1]College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China [2]State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China [3]State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China

出　　处：《Journal of Central South University of Technology》2005年第2期117-122,共6页中南工业大学学报（英文版）

基　　金：Project(50473022) supported by the National Natural Science Foundation; project supported by the State Key Laboratoryof Chemo/Biosensing and Chemometrics of China

摘　　要：Nano-fibrous polyaniline was synthesized on stainless steel electrode in 0.5mol·L-1 H2SO4 solution by pulse galvanostatic method. The effects of synthetic conditions of pulse galvanostatic method on the electroactivity of polyaniline were investigated. The results show that the electroactivity of polyaniline film strongly depends on the synthetic conditions, such as the ratio of “on time” to “off time”(ton/toff), frequency, monomer concentration, temperature and mean current density. Different electroactivities of polyaniline are caused by different morphologies of polyaniline. The nano-fibrous polyaniline has higher electroactivity than polyaniline with other morphologies. Under the following conditions: mean current density of pulse galvanostatic method 13mA·cm-2, ton/toff 1, frequency 200Hz, monomer concentration 0.3mol·L-1 and temperature 20℃, nano-fibrous polyaniline film with the highest electroactivity can be obtained.Nano-fibrous polyaniline was synthesized on stainless steel electrode in 0.5mol·L^(-1) H_2SO_4 solution by pulse galvanostatic method. The effects of synthetic conditions of pulse galvanostatic method on the electroactivity of polyaniline were investigated. The results show that the electroactivity of polyaniline film strongly depends on the synthetic conditions, such as the ratio of “on time” to “off time”(t_(on)/t_(off)), frequency, monomer concentration, temperature and mean current density. Different electroactivities of polyaniline are caused by different morphologies of polyaniline. The nano-fibrous polyaniline has higher electroactivity than polyaniline with other morphologies. Under the following conditions: mean current density of pulse galvanostatic method 13mA·cm^(-2), t_(on)/t_(off) 1, frequency 200Hz, monomer concentration 0.3mol·L^(-1) and temperature 20℃, nano-fibrous polyaniline film with the highest electroactivity can be obtained.

关 键 词：POLYANILINE pulse galvanostatic method nano-fiber MORPHOLOGY ELECTROACTIVITY 

分 类 号：TG174[金属学及工艺—金属表面处理]