基底材料对脉冲电流法制备的聚苯胺膜性能的影响  

Influences of Substrate Materials on Properties of Nano-fibrous Polyaniline Film Prepared by Pulse Galvanostatic Method

作　　者：温靖邦[1] 周海晖[1] 罗胜联[1] 庞新宇[1] 陈金华[1] 旷亚非[1] 

机构地区：[1]湖南大学化学化工学院化学生物传感与计量学国家重点实验室,长沙410082

出　　处：《高等学校化学学报》2006年第5期948-950,共3页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:50473022);湖南大学校基金重点项目资助

摘　　要：Effects of substrate materials on the properties of nanofibrous polyaniline（PANI） film prepared by the pulse galvanostatic method（PGM） were investigated.The chronopotentiograms of aniline polymerization in 0.3 mol/L aniline+1 mol/L HNO3 aqueous solution showed that the anodic potential on Pt and Ru electrodes rised to 880 and 850 mV quickly when the mean current density was 1.0 mA/cm2.The potential turned to（750 mV） after about 40 s and kept constant until the experiment was over.When the aniline polymerization occurred on stainless steel（SS） and Al electrodes,the anodic potential climbed to 1 100 and 1 700 mV respectively,and after about 55 and 250 s it turned to 750 mV.The scanning electron microscopic images demonstrated that the PANI films on Pt,Ru,SS and Al prepared by PGM all exhibited a similar fibrous morphology with a diameter of 80-100 nm.Therefore,it can be considered that the PGM polymerization of aniline on different substrate materials was markedly distinct when the surface of electrode was not covered by PANI completely.The cyclic voltammograms and electrochemical impedance spectroscopy results showed that PANI films on various substrates presented different electrochemical reactivities in an aqueous aniline free solution of（1 mol/L） HNO3.Effects of substrate materials on the properties of nanofibrous polyaniline （PANI） film prepared by the pulse galvanostatic method（PGM） were investigated. The chronopotentiograms of aniline polymerization in 0. 3 mol/L aniline ＋ 1 mol/L HNO3 aqueous solution showed that the anodic potential on Pt and Ru electrodes rised to 880 and 850 mV quickly when the mean current density was 1.0 mA/cm^2. The potential turned to 750 mV after about 40 s and kept constant until the experiment was over. When the aniline polymerization occurred on stainless steel（SS） and AI electrodes, the anodic potential climbed to 1 100 and 1 700 mV respectively, and after about 55 and 250 s it turned to 750 mV. The scanning electron microscopic images demonstrated that the PANI films on Pt, Ru, SS and A1 prepared by PGM all exhibited a similar fibrous morphology with a diameter of 80--100 nm. Therefore, it can be considered that the PGM polymerization of aniline on different substrate materials was markedly distinct when the surface of electrode was not covered by PANI completely. The cyclic vohammograms and electrochemical impedance spectroscopy results showed that PANI films on various substrates presented different electrochemical reactivities in an aqueous aniline free solution of 1 mol/L HNO3.

关 键 词：聚苯胺 基底材料 脉冲电流法(PGM) 电化学行为 

分 类 号：O646.54[理学—物理化学] TQ150.1[理学—化学]