Synthesis, characterization and low frequency a.c. conduction of polyaniline/fly ash composites

Bulletin of materials science

M Revanasiddappa²  M V N Ambika Prasad³  S C Raghavendra¹  Syed Khasim³  A B Kulkarni¹ 

[1] Department of Applied Electronics, Gulbarga University, Gulbarga 585 106, India$$Department of Applied Electronics, Gulbarga University, Gulbarga 585 106, IndiaDepartment of Applied Electronics, Gulbarga University, Gulbarga 585 106, India$$;Department of Chemistry, Gulbarga University, Gulbarga 585 106, India$$Department of Chemistry, Gulbarga University, Gulbarga 585 106, IndiaDepartment of Chemistry, Gulbarga University, Gulbarga 585 106, India$$;Department of Physics, Gulbarga University, Gulbarga 585 106, India$$Department of Physics, Gulbarga University, Gulbarga 585 106, IndiaDepartment of Physics, Gulbarga University, Gulbarga 585 106, India$$

关键词: Conductivity;    polarons;    polyaniline;    fly ash.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

in situ polymerization of aniline was carried out in the presence of fly ash (FA) to synthesize polyaniline/fly ash (PANI/FA) composites. The PANI/FA composites have been synthesized with various compositions (15, 20, 30 and 40 wt%) of FA in PANI. The composites, thus synthesized have been characterized by infrared spectroscopy and X-ray diffraction. The morphology of these samples was studied by scanning electron microscopy. Further the a.c. conductivity of these composites have been investigated in the frequency range 10²â€�??10⁶ Hz. The presence of polarons and bipolarons are made responsible for frequency dependence of a.c. conductivity in these composites. The Coleâ€�?�Cole plots indicate clear shift in the distribution of relaxation times as the wt% of FA in PANI changes. These composites show almost symmetric semicircles of Coleâ€�?�Cole plots indicating the Debye-type relaxation in their polarization response.

【 授权许可】

Unknown