Incorporation of graphite into iron decorated polypyrrole for dielectric and EMI shielding applications

•PPY/Graphite compositions were synthesized successfully using chemical polymerization method.•Filling of Graphite into PPy matrix is confirmed via FTIR and XRD analysis.•Maximum AC conductivity is witnessed for MSNG 2 sample.•EMI shielding effect is increased with increase in Graphite concentration...

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Bibliographic Details
Published in:Synthetic metals 2020-09, Vol.267, p.116450, Article 116450
Main Authors: Madhusudhan, C.K., Mahendra, K., Madhukar, B.S., Somesh, T.E., Faisal, Muhammad
Format: Article
Language:English
Subjects:
Chemical synthesis
Conducting polymer
Dielectric property
Dielectrics
Electrical conductivity and EMI shielding
Electrical measurement
Electrical properties
Fourier transforms
Frequency ranges
Graphite
Microwave frequencies
Nanocomposites
Optical properties
Oxidation
Polypyrrole
Polypyrroles
Shielding
X ray powder diffraction
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Summary:•PPY/Graphite compositions were synthesized successfully using chemical polymerization method.•Filling of Graphite into PPy matrix is confirmed via FTIR and XRD analysis.•Maximum AC conductivity is witnessed for MSNG 2 sample.•EMI shielding effect is increased with increase in Graphite concentration to the PPy matrix. Synthesis of polypyrrole (PPy) / graphite (G) composites via chemical oxidation polymerization method is reported. Synthesized composites were studied for its structural, optical and electrical properties. Structural and morphological studies were performed using powder X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy and the effect of graphite on the properties of PPy is elaborated in detail. Further, the electrical measurements were carried using dielectric analyzer. Dielectric behavior of the composites was also compared with the PPy and graphite and confirmed the dependency of graphite on PPy/graphite nanocomposites. The EMI shielding response of PPy/graphite nanocomposites were measured in the microwave frequency range from 12 to 18 GHz (Ku band), of practical relevance. The observed effective electrical and EMI shielding properties highlights the prospects of multifunctional applications of these PPy/graphite nanocomposites.
ISSN:0379-6779
1879-3290
DOI:10.1016/j.synthmet.2020.116450