| Titre : |
The electrodeposition of polypyrrole on Al alloy from room temperature ionic liquids |
| Type de document : |
texte imprimé |
| Auteurs : |
Jun Nie, Auteur ; Gordon P. Bierwagen, Auteur ; Dennis E. Tallman, Auteur |
| Année de publication : |
2008 |
| Article en page(s) : |
p. 327-334 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Aluminium -- Alliages
Dépôt électrolytique
Liquides ioniques
Polypyrroles
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The direct electrodeposition of conjugated polymers onto active metals such as aluminum and its alloys is complicated by the concomitant oxidation of the metal that occurs at the positive potential required for polymer formation/deposition. We previously described an approach that uses electron transfer mediation to reduce the deposition potential of polypyrrole (PPy) on aluminum and aluminum alloy by nearly 500 mV, permitting film deposition from aqueous solution with nearly 100% current efficiency. In this report, 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide (EMIM+TFSI-) has been successfully employed both as the growth medium and the supporting electrolyte for directly depositing uniform and conductive PPy coatings onto Al alloy 2024-T3 surface via a potentiodynamic technique. The depositions of PPy were carried out under cyclic voltammetric conditions from 0.3 M pyrrole in ionic liquid solutions. Film morphology was characterized by atomic force microscopy, optical microscopy, and scanning electron microscopy (SEM). Energy dispersive X-ray analysis and X-ray photoelectron spectroscopy verified that the TFSI- anion was incorporated into the polymer as the dopant ion. Thickness of the film was measured by SEM and film conductivity was determined by both a four-point probe technique and by conducting atomic force microscopy. Electrochemical activity of the film was assessed by cyclic voltammetry. Results from these preliminary studies will be reported. |
| DOI : |
10.1007/s11998-008-9084-x |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-008-9084-x.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2976 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 5, N° 3 (09/2008) . - p. 327-334
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The electrodeposition of polypyrrole on Al alloy from room temperature ionic liquids in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 5, N° 3 (09/2008)
