Synthesis of expanded graphite filled polyaniline composites and evaluation of their electrical and electrochemical properties

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• 作者：Surajit Konwer (1)
  Jyoti P. Gogoi (2)
  Amarjyoti Kalita (1)
  Swapan K. Dolui (1) dolui@tezu.ernet.in
• 刊名：Journal of Materials Science: Materials in Electronics
• 出版年：2011
• 出版时间：August 2011
• 年：2011
• 卷：22
• 期：8
• 页码：1154-1161
• 全文大小：489.3 KB
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• 作者单位：1. Department of Chemical Sciences, Tezpur University, Napaam, Assam, India2. Department of Physics, Tezpur University, Napaam, Assam, India
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Optical and Electronic Materials
  Characterization and Evaluation Materials
  
• 出版者：Springer New York
• ISSN：1573-482X

文摘

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.