Journal
MACROMOLECULAR CHEMISTRY AND PHYSICS
Volume 211, Issue 6, Pages 627-634Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/macp.200900444
Keywords
acid concentration; morphology control; nanofibers vs. nanotubes; polyaniline detectable reaction intermediates; UV-Vis spectroscopy
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Funding
- Los Alamos National Laboratory
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Formation of detectable intermediate aggregates is found to affect the morphologies of PANI nanomaterials, leading to either tubular or rod structures with striated growth and rough surfaces. By simply varying the ratio of initial proton and aniline concentration, a wide range of product morphologies can be synthesized. The intermediates form visible aggregates that can be separated by centrifugation or filtration. In addition to UV-Vis monitoring of the intermediate aggregates, OCP and pH measurements are used to monitor the reaction process. GPC measurements show that the corresponding final products formed typically are not homogeneous. The correlation of intermediates formation and aggregation with product morphology suggests a route to controlled synthesis of PANI nanomaterials.
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