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JCT Research : Volume 5, Issue 2, June 2008

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JCT Research : Volume 1

The electrodeposition of polypyrrole on Al alloy from room temperature ionic liquids

Content Provider	Springer Nature Link
Author	Nie, Jun Tallman, Dennis E. Bierwagen, Gordon P.
Copyright Year	2008
Abstract	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.
Starting Page	327
Ending Page	334
Page Count	8
File Format	PDF
ISSN	15470091
Journal	JCT Research
Volume Number	5
Issue Number	3
e-ISSN	19353804
Language	English
Publisher	Springer US
Publisher Date	2008-02-29
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Polypyrrole Room temperature ionic liquids Electrodeposition Aluminum alloy Materials Science Polymer Sciences Industrial Chemistry/Chemical Engineering Surfaces and Interfaces, Thin Films Tribology, Corrosion and Coatings
Content Type	Text
Resource Type	Article
Subject	Chemistry Surfaces, Coatings and Films Colloid and Surface Chemistry Surfaces and Interfaces

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