Citation: LI Jun, QI Lu, LI Hui-Hao. Synthesis and Dielectric Properties of FeCl₃ /Conjugated Ploy Schiff Base Composite[J]. Chinese Journal of Inorganic Chemistry, ;2016, 32(1): 96-102. doi: 10.11862/CJIC.2016.029 shu

Synthesis and Dielectric Properties of FeCl₃ /Conjugated Ploy Schiff Base Composite

Tianjin Key Laboratory of Fiber Modification and Functional Fiber, Research Institute of Biologic and Spinning Materials, Tianjin Polytechnic University, Tianjin 300387, China

Corresponding author: QI Lu, qilu20150501@163.com
Received Date: 17 August 2015
Revised Date: 2 December 2015

Figures(8)

The conjugated Poly Schiff base (CPSB) was synthesized through condensation reaction between glutaraldehyde and p-phenylenediamine, then cross-linked with melamine to build a three-dimensional network structure, which was further doped with Fe³⁺ to form FeCl₃ /CPSB composite with urchin-like structure. Meanwhile, the conductivity (σ), the real and imaginary parts of permittivity (ε′, ε″) and the dielectric loss tangent value (tanδ_ε) occurred a significant increase and the Cole-Cole semicircle start from scratch, through comparing the initial and after 6 months value of CPSB with 0.02, 0.03, 0.04 mol Fe³⁺ doping content. The result displayed that ε″ was changed from a negative value to a positive value in 3.664×10⁶~1.000×10⁷ Hz after six months. Wherein, tanδ_ε of composite with 0.04 mol Fe³⁺ doping content was increased from 0.02 to 6.13 and σ was increased from 7.15×10^-7 S·cm^-1 to 2.19×10^-5 S·cm^-1 in 10² Hz. The ε′ and ε″ were increased significantly as well. There are double relaxation mechanisms contributing the Debye relaxation to enhanced dielectric properties of the FeCl₃/CPBS composite.
- Schiff bases,
- doping,
- dielectric properties,
- conductivity,
- debye relaxation
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Synthesis and Dielectric Properties of FeCl₃ /Conjugated Ploy Schiff Base Composite