Abstract
AbstractComposite films of polyacrylonitrile (PAN)/multiwalled carbon nanotubes (MWNTs) were fabricated by gelation/crystallization from solution. The composite films were elongated twofold and heat‐treated at 2800 °C to produce oriented carbon films. The orientation and morphology of the resultant carbon films were investigated by scanning electron microscopy, wide‐angle X‐ray diffraction and Raman spectrometers. The results indicate that the degree of graphitization of PAN was enhanced by the addition of MWNTs, at the same time, the elongation induced the orientation of MWNTs along elongation direction and the co‐orientation of MWNTs and the molecular chains of the matrix PAN greatly promoted the carbonization of composite precursor. It is suggested that carbon nanotubes acted as nucleation side of graphitic crystal during the carbonization of PAN‐MWNTs composites. Copyright © 2008 Curtin University of Technology and John Wiley & Sons, Ltd.
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