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Volume 62, Issue 2


Polyaniline-coated cellulose fibers decorated with silver nanoparticles

Jaroslav Stejskal
  • Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, 162 06, Prague 6, Czech Republic
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/ Miroslava Trchová
  • Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, 162 06, Prague 6, Czech Republic
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/ Jana Kovářová
  • Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, 162 06, Prague 6, Czech Republic
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/ Jan Prokeš / Mária Omastová
Published Online: 2008-03-04 | DOI: https://doi.org/10.2478/s11696-008-0009-z


Cellulose fibers of 20 μm in diameter and aspect ratio of 2 or 10 were coated with protonated polyaniline (PANI) during the oxidation of aniline hydrochloride with ammonium peroxydisulfate in an aqueous medium. The presence of PANI has been proved by FTIR spectroscopy. The conductivity increased from 4.0 × 10−14 S cm−1 to 0.41 S cm−1 after coating the fibers with PANI. The percolation threshold in the mixture of original uncoated and PANI-coated fibers was reduced from 10 mass % PANI to 6 mass % PANI, as the aspect ratio changed from 2 to 10. The subsequent reaction with silver nitrate results in the decoration of PANI-coated cellulose fibers with silver nanoparticles of about 50 nm average size. The content of silver of up to 10.6 mass % was determined as a residue in thermogravimetric analysis. FTIR spectra suggest that the protonated emeraldine coating changed to the pernigraniline form during the latter process and, consequently, the conductivity of the composite was reduced to 4.1 × 10−4 S cm−1, despite the presence of silver.

Keywords: cellulose; conducting polymer; conductivity; polyaniline; silver; nanoparticle

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About the article

Published Online: 2008-03-04

Published in Print: 2008-04-01

Citation Information: Chemical Papers, Volume 62, Issue 2, Pages 181–186, ISSN (Online) 1336-9075, DOI: https://doi.org/10.2478/s11696-008-0009-z.

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