The role of unbound oligomers in the nucleation and growth of electrodeposited polypyrrole and method for preparing high strength, high conductivity films

Zheng, Wen, Razal, Joselito M, Spinks, Geoffrey M, Truong, Van-Tan, Whitten, Philip G and Wallace, Gordon G 2012, The role of unbound oligomers in the nucleation and growth of electrodeposited polypyrrole and method for preparing high strength, high conductivity films, Langmuir, vol. 28, no. 29, pp. 10891-10897, doi: 10.1021/la301701g.

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Title The role of unbound oligomers in the nucleation and growth of electrodeposited polypyrrole and method for preparing high strength, high conductivity films
Author(s) Zheng, Wen
Razal, Joselito MORCID iD for Razal, Joselito M orcid.org/0000-0002-9758-3702
Spinks, Geoffrey M
Truong, Van-Tan
Whitten, Philip G
Wallace, Gordon G
Journal name Langmuir
Volume number 28
Issue number 29
Start page 10891
End page 10897
Total pages 7
Publisher American Chemical Society
Place of publication Washington, DC
Publication date 2012
ISSN 0743-7463
Keyword(s) Unbound Oligomers
Electrodeposited polypyrrole
High conductivity films
Summary Polypyrrole is a material with immensely useful properties suitable for a wide range of electrochemical applications, but its development has been hindered by cumbersome manufacturing processes. Here we show that a simple modification to the standard electrochemical polymerization method produces polypyrrole films of equivalently high conductivity and superior mechanical properties in one-tenth of the polymerization time. Preparing the film as a series of electrodeposited layers with thorough solvent washing between layering was found to produce excellent quality films even when layer deposition was accelerated by high current. The washing step between the sequentially polymerized layers altered the deposition mechanism, eliminating the typical dendritic growth and generating nonporous deposits. Solvent washing was shown to reduce the concentration of oligomeric species in the near-electrode region and hinder the three-dimensional growth mechanism that occurs by deposition of secondary particles from solution. As artificial muscles, the high density sequentially polymerized films produced the highest mechanical work output yet reported for polypyrrole actuators.
Language eng
DOI 10.1021/la301701g
Field of Research 109999 Technology not elsewhere classified
Socio Economic Objective 970110 Expanding Knowledge in Technology
HERDC Research category C1.1 Refereed article in a scholarly journal
Persistent URL http://hdl.handle.net/10536/DRO/DU:30061330

Document type: Journal Article
Collection: Faculty of Science, Engineering and Built Environment
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