Poly (3, 4-ethylene dioxythiophene) laminated reduced graphene oxide composites for effective electromagnetic interference shielding

Conjugated polymers composites are advanced materials for electrically conducting application because of high aspect ratio and improved properties with low amount of filler in the polymer. The present paper, reports the genesis of poly (3, 4-ethylene dioxythiophene) (PEDOT) on the layers of reduced graphene oxide (RGO) via insitu chemical oxidative polymerization using dodecyl benzene sulfonic acid (DBSA) as surfactant. In low temperature polymerization, PEDOT has been allowed to grow on RGO results in core shell type composites as revealed by Scanning electron microscope images which provide good electromagnetic shielding properties in 12.4-18 GHz frequency range. Dielectric and shielding properties reveals that as prepared composites have high affinity for the absorption of microwaves with absorption value (SEA) of 34.7 dB (similar to 99.97% attenuation) with broad bandwidth has been achieved. Higher absorption value is due to the lossy nature with dielectric loss (epsilon ''/epsilon' = similar to 3.1) which results from the laminar morphology of the composites and found to increase with the thickness of material and the concentration of RGO. (C) 2016 Elsevier B.V. All rights reserved.