Morgan, M., Fielding, L.A. and Armes, S.P. (2013) Synthesis and characterisation of sterically stabilised polypyrrole particles using a chemically reactive poly(vinyl amine)-based stabiliser. Colloid and Polymer Science, 291 (1). 77 - 86. ISSN 0303-402X
Abstract
Poly(vinyl amine) (PVAm) was derivatised using 2-thiophenecarboxaldehyde via Michael addition to prepare a statistical copolymer stabiliser for the synthesis of primary amine-functionalised polypyrrole (PPy) particles. A minimum stabiliser concentration of around 20 % (w/v) relative to pyrrole was required for well-defined PPy particles of approximately 100–200 nm, as judged by transmission electron microscopy (TEM) and dynamic light scattering (DLS). FTIR spectroscopy confirmed that stabiliser grafting had occurred, while x-ray photoelectron spectroscopy (XPS) studies indicated a stabiliser surface coverage on the PPy particles of around 53 %. PPy particles prepared at stabiliser concentrations below 20 % (w/v) were not colloidally stable above pH 6. However, higher stabiliser concentrations (e.g., 50 % (w/v) based on pyrrole) led to a significant improvement, with colloidal stability being retained above pH 7. Long-term colloidal stability studies of PPy particles stored at pH 7.5 confirmed that the amine-based stabiliser produced more stable aqueous dispersions than the imine-based stabiliser, since the latter bond is hydrolytically unstable.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2013 Springer. This is an author produced version of a paper subsequently published in Colloid and Polymer Science. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Polypyrrole; Primary amine; Aqueous dispersion polymerisation; Immunodiagnostics; Chemical grafting; Steric stabilisation; Conducting polymer |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Chemistry (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 09 May 2014 09:45 |
Last Modified: | 16 Nov 2016 07:42 |
Published Version: | http://dx.doi.org/10.1007/s00396-012-2678-y |
Status: | Published |
Publisher: | Springer |
Refereed: | Yes |
Identification Number: | 10.1007/s00396-012-2678-y |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:78393 |