On the improvement of stability of polypyrrole films in aqueous solutions

被引：31

作者：

Alumaa, A. ^{[1
]}

Hallik, A. ^{[1
]}

Sammelselg, V. ^{[1
]}

Tamm, J. ^{[1
]}

机构：

[1] Univ Tartu, Inst Phys Chem, Tartu, Estonia

来源：

SYNTHETIC METALS | 2007年 / 157卷 / 10-12期

关键词：

polypyrrole; stability; degradation; overoxidation; adsorption; pi-Electronic interaction;

D O I：

10.1016/j.synthmet.2007.05.006

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The stability of oxidised polypyrrole (PPy) doped with mobile anion (CIO4(-)) was studied in aqueous media. The influence of various components of the solution (dissolved O-2, indifferent electrolyte, organic compounds) on the stability of PPy was characterised by cyclic voltammetry and electron-probe X-ray microanalysis (EPMA). It was established that dissolved O-2 favours the PPy overoxidation-the rate determining process of the electrochemical corrosion. The high concentration of the indifferent electrolyte on the other hand enhances the stability of the PPy in aqueous solutions to an essential extent. The more effective inhibitors of the PPy corrosion are the surface-active anions (dodecyl sulfate) and polar aromatic compounds (benzyl alcohol, benzonitrile). (c) 2007 Elsevier B.V.. All rights reserved.

引用

页码：485 / 491

页数：7

共 33 条

[1] CONDUCTING POLYMER GAS SENSORS .3. RESULTS FOR 4 DIFFERENT POLYMERS AND 5 DIFFERENT VAPORS [J].