|
|||||
|
|
A study on the influence of anionic surfactants on electrochemical degradation of polyaniline |
|
| Authors: | MS Rahmanifar M Shamsipur |
| Institution: | a Department of Chemistry, Tarbiat Modares University, Tehran, P.O. Box 14115-175, Islamic Republic of Iran b Department of Chemistry, Razi University, Kermanshah, Islamic Republic of Iran c Department of Chemistry, Yasouj University, Yasouj, Islamic Republic of Iran |
| Abstract: | The influence of anionic surfactants on the electrochemical degradation of polyaniline (PANI), deposited by electro-polymerization onto platinum electrodes, was investigated in an aqueous medium by means of cyclic voltammetry. The degradation rate was found to be greatly dependent on the pH of the solution. The electrochemical degradation of PANI/dodecylsulfate and PANI/dodecylbenzenesulfonate films was compared with that of a PANI/hydrochloride film. The degradation rate in the two former cases decreased by some 50% compared to the PANI/hydrochloride film in aqueous solution at pH = 2. The results were confirmed with theoretical calculations performed on the evaluation of head group charge of surfactants, the distance of anions from PANI positive sites and the shielding of anions on PANI positive sites. |
| Keywords: | Polyaniline Electrochemical degradation Anion effect Surfactant effect Theoretical calculations |
| 本文献已被 ScienceDirect 等数据库收录！ | |