Abstract
This work investigate the influence of type I cellulose characteristics on the electric conductivity and heat stability of cellulose-polyaniline composites. Different cellulose sources were used, namely: wood, cotton and microcrystalline cellulose. They are all type I, for which all chains are in ordered parallel arrangement, but differ by their polymerization degrees, their crystallinity index and their ionizable functional groups amount. The composites have been synthesized by in-situ polymerization of aniline in the cellulose suspension. Several characterization techniques were applied such as Fourier-transform infrared spectroscopy, 13C nuclear magnetic resonance, X-ray powder diffraction, thermogravimetric analysis, scanning electron microscopy and energy dispersive X-ray spectrometry. The electric conductivity of each prepared composite was determined using Ossila's Four Point Probe System. The results indicate that the polyaniline loading is strongly influenced by the crystallinity of the used cellulose, which influences the electric properties of the composite.
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