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Journal of Macromolecular Science, Part B
Physics
Volume 50, 2010 - Issue 1
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Original Articles

Polyaniline/LiNi0.5La0.08Fe1.92O4 Nanocomposite: A Study of Dielectric and Electric Modulus Spectroscopy

Jing Jiang Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong, China; College of Chemistry and Chemical Engineering, China West Normal University, Nanchong, China
&
Lun-Hong Ai Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong, China; College of Chemistry and Chemical Engineering, China West Normal University, Nanchong, China
Pages 26-32 | Received 16 Jul 2009, Accepted 21 Nov 2009, Published online: 20 Nov 2010
 
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Abstract

Polyaniline(PANI)/LiNi0.5La0.08Fe1.92O4 nanocomposite was synthesized by an in situ polymerization of aniline in the presence of LiNi0.5La0.08Fe1.92O4 nanoparticles. The dielectric properties of a PANI/LiNi0.5La0.08Fe1.92O4 (10 wt% weight ratio of LiNi0.5La0.08Fe1.92O4 to aniline monomer) nanocomposite were investigated in the frequency range of 106–109 Hz. The dielectric constant (ϵ′) and dielectric loss (ϵ″) were frequency dependent, having relatively high values at low frequency and decreasing with increasing frequency. The values of ϵ′ and ϵ″ of PANI/LiNi0.5La0.08Fe1.92O4 nanocomposite were found to be lower than those of the pristine PANI. Electric modulus analysis was carried out to understand the electrical relaxation process.

This work was supported by Scientific Research Start-up Foundation of China West Normal University (07B008).

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