Abstract
The flow of an anodic current density of 0.5 mA. cm-2 through a 5 mmol/l solution of 2,5-di-(2-thienyl)pyrrole (SNS), in acetonitrile, gives dark-violet and uniform polymer films coating the platinum electrode in presence of different electrolytes. The process is named either electropolymerization or electrogeneration. The new material was insoluble in acetonitrile solutions of different salts. When a cathodic current density of 0.2 mA. cm-2 was applied to the coated electrode, a yellow-green cloud was observed around it. The electrodissolution occurs due to the high, and fast, solubility of the reduced poly(SNS) in the electrolyte. This electrodissolution also followed a faradaic process. Deposits of oxidized poly(SNS) films have been further obtained on a Pt electrode by flow of an anodic constant current through a solution containing a salt and the reduced poly(SNS) in acetonitrile. The electrodeposition occurs in presence of different electrolytes. Electrodeposited weights are proportional to the consumed charge: the electrodeposition is a faradaic process. Electrodeposited films are partially electrosoluble in their background solutions. Electrodissolution and electrodeposition from ammonium salts are reverse processes showing the same productivities and mimicking similar processes with inorganic metals. Electrodissolution and electrodeposition processes are being applied to the processability of new actuators and artificial muscles.
| Original language | English |
|---|---|
| Pages (from-to) | 167-172 |
| Number of pages | 6 |
| Journal | Materials Research Society Symposium - Proceedings |
| Volume | 600 |
| Publication status | Published - 2000 |
| Externally published | Yes |
| Event | The 1999 MRS Fall Meeting- Symposium Electroactive Polymers - Boston, MA, USA Duration: 29 Dec 1999 → … |