Abstract
Polyaniline (PANI) nanotubes were prepared by oxidative polymerization of aniline in the presence of two structure-directing agents—salicylic acid (SA) and sodium dodecyl sulfate (SDS). When using only SA, mainly aggregated nanotube dendrites or coral-like structures have been obtained. Addition of a very small amount of the surfactant SDS, much less than the critical micelle concentration, results in substantial reduction of the aggregated nanotube morphology on the account of isolated PANI nanotubes, which is the favorable structure from the point of view of further modification. In order to make the isolated nanotubes water dispersible, their surface was modified by complex formation (non-covalent grafting) with hydrophilic poly(ethylene oxide)-block-poly(acrylic acid) copolymer. These water-dispersible PANI nanotubes might be good candidates for some biochemical and biomedical applications.
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Acknowledgements
We thank Prof. A.H.E. Mueller and Prof. W. Meier for their help. The financial support of the Swiss National Research Foundation (POLYTUBE IB 7320-110726/1) and the National Science Fund of Bulgaria (Ch-1511 and Ch-1403) is gratefully acknowledged. P.P. is very grateful to the Alexander von Humboldt-Stiftung for a research fellowship.
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Petrov, P., Mokreva, P., Tsvetanov, C.B. et al. Colloidal aqueous dispersion of polyaniline nanotubes grafted non-covalently with poly(ethylene oxide)-block-poly(acrylic acid) copolymer. Colloid Polym Sci 286, 691–697 (2008). https://doi.org/10.1007/s00396-007-1820-8
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DOI: https://doi.org/10.1007/s00396-007-1820-8