Synthesis of expanded graphite filled polyaniline composites and evaluation of their electrical and electrochemical properties |
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Authors: | Surajit?Konwer Jyoti?P?Gogoi Amarjyoti?Kalita Email author" target="_blank">Swapan?K?DoluiEmail author |
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Affiliation: | (1) Department of Chemical Sciences, Tezpur University, Napaam, Assam, India;(2) Department of Physics, Tezpur University, Napaam, Assam, India; |
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Abstract: | A series of conducting polyaniline/expanded graphite (PA/EG) composite was synthesized by in situ polymerization of aniline
in acid medium followed by the addition of expanded graphite in various proportions (1, 2 and 3 wt%). The synthesized samples
were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, thermogravimetric analysis, ultraviolet–visible
absorption, X-ray diffraction and by electrical conductivity measurements. The dc electrical conductivities of the composites
were dramatically increased compared with pure polyaniline and found to be 0.50 × 102 S/cm to 6.11 × 102 S/cm. The PA/EG composites showed a reversible electrochemical response up to 150th repeated cycles as revealed by the cyclic
voltametry study. |
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