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Electrical and structural properties of polyaniline/cellulose triacetate blend films
Authors:Sh M Ebrahim  A B Kashyout  M M Soliman
Affiliation:(1) Department of Materials Science, Institute of Graduate Studies and Research, Alexandria University, 163 Horrya Avenue, El-Shatby, Alexandria, Egypt;(2) Institute of Advanced Technology and New Materials, Mubarak City for Scientific Research and Technology Applications, Borg El-Arab City, Alexandria, Egypt
Abstract:Polyaniline (PANI) has been blended with cellulose triacetate (CTA) to obtain both good mechanical properties and good electrical properties. The effects of PANI weight percentage on the optical, structural, morphological and electrical properties in the blend films of polyaniline and cellulose triacetate (PANI/CTA) have been investigated. The phenomenon of percolation was observed in these blend films. It is found that the electrical conductivity of the blend films increases with the increase of polyaniline content up to a value of 10−4 S cm−1 at 84 weight percentage of PANI. The experimental percolation threshold of the dried blend films is obtained at 9.5 wt% of polyaniline. The values of Mott’s temperature, density of states at the Fermi level N (E f)], hopping distance (R hop), and barrier height (W hop) for PANI/CTA blend films are calculated. By applying Mott’s theory, it is found that the PANI/CTA blend films obey the three dimensional variable range hopping mechanism.
Keywords:Conducting polymers  Polyaniline  Cellulose triacetate  Blend  hopping mechanism
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