Abstract
ABSTRACT: Polypyrrole and polypyrrole / silver nanocomposites were fabricated by in-situ polymerization employing Ammonium Persulphate as an oxidizing agent. Nanocomposites were synthesized by combining polypyrrole and silver nanoparticles in various weight percentages (0.1%, 0.5%, 3%, 5% and 7% wt.). Crystallographic data were collected using X-ray diffraction. PPy particles were found to have an orthorhombic symmetry. In contrast, PPy/Ag nanocomposites were reported to have monoclinic structure. The crystallite size was determined by XRD using Scherrer equation and considered to be within 49 nm range. DC conductivity of pelletized samples was evaluated in the temperature range of 323.15k to 453.15k. The conductivity displayed an increase when the temperature is increased from 323.15k to 453.15k. Activation energies were determined from plots of Arrhenius for all nanocomposites. The findings indicated that the activation energy decrease with increasing the weight percentage of Ag nanoparticles in the nanocomposites.
Highlights
Due to its unique characteristics and wide range of applications in various electronic devices, conductive paint, drug delivery, rechargeable batteries and sensors, etc., nanocomposites have been one of the most thoroughly investigated materials worldwide in the last two decades
Activation energy The variation of electrical conductivity against 1000/T of PPy and PPy/Ag nanocomposites at various temperatures can be presented by Arrhenius equation which can be illustrated by the following equation [14]:
The results of XRD analysis indicated that the PPy/Ag (0.1%, 0.5%, 3%, 5% and 7% wt.) nanocomposites were successfully synthesized
Summary
Due to its unique characteristics and wide range of applications in various electronic devices, conductive paint, drug delivery, rechargeable batteries and sensors, etc., nanocomposites have been one of the most thoroughly investigated materials worldwide in the last two decades. Key words Polypyrrole, silver nanoparticles, nanocomposites, crystallographic, DC electrical conductivity. Bedre et al used interfacial polymerization to fabricate conducting polypyrrole silver (PPy-AgNC) nanocomposites [8].
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