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Polyaniline-coated cellulose fibers decorated with silver nanoparticles
Stejskal, Jaroslav, Trchová, Miroslava, Kovářová, Jana, Prokeš, Jan and Omastová, Mária Polyaniline-coated cellulose fibers decorated with silver nanoparticles Chemical Papers, Vol.62, No. 2, 2008, 181-186
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Document type:
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Článok z časopisu / Journal Article |
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Collection:
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Chemical papers
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| Author(s) |
Stejskal, Jaroslav
Trchová, Miroslava
Kovářová, Jana
Prokeš, Jan
Omastová, Mária
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| Title |
Polyaniline-coated cellulose fibers decorated with silver nanoparticles
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| Journal name |
Chemical Papers
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| Publication date |
2008
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| Year available |
2008
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| Volume number |
62
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| Issue number |
2
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| ISSN |
0366-6352
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| Start page |
181
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| End page |
186
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| Place of publication |
Poland
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| Publisher |
Versita
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| Collection year |
2008
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| Language |
english
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| Subject |
250000 Chemical Sciences
250500 Macromolecular Chemistry
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| Abstract/Summary |
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.
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