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Beneficial effect of multi-wall carbon nanotubes on the graphitization of polyacrylonitrile (PAN) coating

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Author(s): Mária Darányi | Tamás Csesznok | István Sarusi | Ákos Kukovecz | Zoltán Kónya | András Erdőhelyi | Imre Kiricsi

Journal: Processing and Application of Ceramics
ISSN 1820-6131

Volume: 4;
Issue: 2;
Start page: 59;
Date: 2010;
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Keywords: PAN | Carbon film | Carbon nanotube | Electrical conductivity

ABSTRACT
Polyacrylonitrile (PAN) solutions were deposited on quartz plates by spin coating to yield 2–3 µm thick PAN films. The films were decomposed at 1000°C in N2 atmosphere into electrically conducting carbonaceous coatings. When the precursor solution contained cobalt (0.2 g Co-acetate per 1 g PAN) and/or multi-wall carbon nanotubes (MWCNTs, 2 mg MWCNT per 1 g PAN) the specific electrical resistance of the product film dropped from the original 492 Ω·cm-1 value down to 46 Ω·cm-1. By excluding all other possibilities we came to the conclusion that the beneficial effect of carbon nanotubes is related to their catalytic action in the final graphitization of condensed nitrogen-containing rings into graphitic nanocrystallites.
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