電化學法制備高密度導電聚吡咯的性能研究

1、 7期 35 36 37 38 39 40 王 杰等 : 電 化學法制備高密度導電聚吡咯的性能研究 4261 Joo J, Lee J K, Lee S Y, Jang K S, Oh E J, Epstein A J 2000 Macromolecul es 33 5131 Sakkopoulos S, V itoratos, Dalas E 1998 Synth . Met . 92 63 Wang M X 1999 Polymer bulletin 3 47 ( in Chinese 萬梅香 1999 高分子通報 3 47 Omastova M, Trchova M, Kowarova

2、J, Stejskal J 2003 Synth. M et . 138 447 Shen Y Q, Wan M X 1998 Synth . M et . 96 127 Shi Y Q , Zhang S F, Hu M, Zhao Z X 2001 Polymer Materials 43 41 42 Science and Engineering 17 153 ( in Chinese 時雨荃、 張淑芬、 胡 明 趙竹暄 2001 高分子材料科學與工程 17 153 Ghosh S, Ingan s O 1999 Adv . Mater . 11 1214 Roland H, Jorge

3、 G C, Germa G B 2005 J . Electroanal . Chem . 577 99 Cao C N, Zhang J Q 2004 Introduction to electrochemical impedance spectroscopy ( Beijing: Science Press 86 ( in Chinese 曹楚南、 張 鑒清 2004 電化學阻抗譜導論 ( 北京 : 科學出版社 第 86 頁 Properties of electropolymerized high density polypyrrole films* Wang Jie Xu You Lo

4、ng Chen Xi Du Xian Feng Li Xi Fei 710049, China ( School of Electronic and In formation Engineering , Xi% an Jiaotong University , Xi% an (Received 3 November 2006; revised manuscript received 6 December 2006 Abstract The high density PPy films ( HD PPy, > 1 4 g cm3 doped with p toluenesulfonate

5、( TOS- counterions were electropolymerized by a facile approach in H2 O and acetonitrile ( AN mixed solvent. The structure and electrochemical properties of the HD PPy films were measured by X ray photoelectron spectroscopy ( XPS , thermogravimetric ( TG analysis, cyclic voltammetry ( CV and electro

6、chemical impedance spectroscopy ( EIS . The results show that appropriate ratio of AN H2 O ( 99 1 could be favorable to increase the density of PPy films. Further enhancement of the density could be obtained by using higher current density ( such as 10mA cm , as it favors the format ion of two dimen

7、sional structure. Generally, low temperature of polymerization, T p ( e. g. - 20 , is advantageous to the enhancement of density and conductance of PPy films. But if T p is too low, it beesmes disadvantageous in case of the high current density of polymerization. The HD PPy films ( 1 42 g cm3 were o

8、btained at 0 with 10 mA cm in AN H2 O( 99 1 solution. Furthermore, HD PPy films were characterized not only by 2 2 high electronic conductivity ( 220S cm and high thermal stability, but also by low electrochemical act ivity. It was indicated that the HD PPy would be not only an excellent electrode material but also a promising corrosion protection material. Keywords: polypyrrole film, density, conductivity, stability PACC: 8235, 7360, 8160 * Project support ed by the National Natural Science Foundat ion of China ( Grant No. 50473033 and the Sp