| dc.description.abstract |
The Conductive Polymers (CPs) represent a novel category of materials that combine
the remarkable properties of metals and plastics. They exhibit significant conductivity
when doped with suitable fillers makes them a viable alternative to metallic conductors
and semiconductors. Due to their remarkable properties, such as lightweight, ease of
processing, cost-effectiveness, high cyclability, and excellent mechanical, thermal, and
environmental stability, as well as high specific capacitance and improved conductivity,
CPs have found applications in various fields, including organic light-emitting diodes,
energy storage devices, solar cells, chemical and gas sensors and flexible electronics.
Among various conducting polymers, Polypyrrole (PPy) has garnered significant
attention, which lies in poly-heterocyclic family of conductive polymers. Its electrical
and optical properties are comparable to those of inorganic semiconductors and metals.
Despite its excellent properties, PPy has certain limitations, such as being weak, fragile,
having low mechanical properties, being non-biodegradable, and exhibiting relatively
poor thermal stability in air, which restricts its practical applications. A review of the
literature indicates various strategies to enhance the properties of PPy, such as doping,
developing nanostructures, and creating nanocomposites.
Consequently, in the present study, PPy-based nanocomposites with Tin-Oxide
(SnO2), reduced Graphene Oxide (rGO), and MoS2/rGO have been synthesized with
different concentrations of the fillers in the PPy matrix. Additionally, in the last phase
of the present work, surfactant-directed PPy nanoparticles have also been synthesized
using different concentrations of Camphor Sulphonic Acid (CSA), which is an anionic
surfactant. Structural and morphological properties of all prepared nanocomposites
have been analyzed through X-Ray Diffraction (XRD), Scanning Electron Microscopy
(SEM), and Raman spectroscopic techniques. Further, the DC conductivity and EMI
shielding properties of all the samples have been studied, and their results have been
interpreted in terms of the change in their structural properties as a result of loading
different fillers in the PPy matrix.
The present study of hybrid nanocomposites in PPy makes them suitable over
metal-based EMI shields. Irrespective of metal-based EMI shields, the absorptiondominated total shielding effectiveness suggests that the PPy-based nanocomposite
may be a novel material for the development of efficient EMI shielding devices for
industrial applications. |
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