Conducting polymers and their nanocomposites have become
very popular materials for various technological applications like
nanoelectronic devices, materials science, engineering, energy conversion,
energy storage, environmental management, biomedical sectors, sensors and
thermal management, as these materials have exhibited very attractive
electrical properties. Iron decorated polypyrrole (Fe-Ppy) was synthesised by
in situ polymerisation, varying the concentration of oxidising agent (FeCl3)
and green tea extract. The synthesised Fe-Ppy composite samples have been
characterised by XRD, FTIR, SEM and TEM and confirmed. The DC conductivity of the composite samples was
measured in the temperature range 303-378 K. The results revealed that the
conductivity slightly increases with an increase in temperature. Fe
(0.31M)-Ppy-10ml green tea extracted sample exhibited the highest conductivity
(-0.5 S/m), and Fe (1.23M)-Ppy-40ml green tea extract exhibits the lowest
conductivity (-5.5 S/m) among synthesised composite samples. And as the
conductivity of samples increased, the EMI Shielding effectiveness between 2
GHz and 3 GHz decreased, as compared to the other composites. Activation energy
found to increase up to Fe-(0.92M)-Ppy 30ml sample, and it was maximum for Fe (1.54M)-Ppy
50ml sample. Polymeric nanocomposite materials could find applications as
dielectric materials in capacitors and as a better base insulation material for
Printed Circuit Boards (PCB). They can be used as conductive in situ precoat
materials for the metallization of PCB patterns. Particularly, Fe/Ppy is a good
conducting polymer composite for sensors, solar cells, ultra-capacitors, and
electrochromic displays, etc.
Author(s) Details
B M Basavaraja Patel
Department of Chemistry, B N M Institute of Technology, Bangalore 560070,
Karnataka, India.
K N N Prasad
Department of Physics, B N M Institute of Technology, Bangalore 560070,
Karnataka, India.
S Chandrasekhar
Department of Physics, B N M Institute of Technology, Bangalore 560070,
Karnataka, India.
S Balasaraswathy
Department of Physics, B N M Institute of Technology, Bangalore 560070,
Karnataka, India.
M Revanasiddappa
Research Centre-Department of Chemistry, PES University, Electronic City
Campus, Bangalore, 560100, Karnataka, India.
S Yallappa
Department of Chemistry, Cambridge Institute of Technology, Bangalore
560036, Karnataka, India.
Please see the book here :- https://doi.org/10.9734/bpi/cmsrf/v6/7038
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