Fly ash incorporated polyaniline as a high performance shield against electromagnetic pollution

Publication Type:

Conference Paper


Department of Physics, Cochin University of Science and Technology, Cochin, Kerala, India, Cochin, Kerala, India (2015)



Department of Science and Humanities


There is an ever increasing demand for high-performance electromagnetic interference (EMI)shielding materials due to the rapid proliferation of electronics and instrumentation systems.Fly ash is an amorphous coal byproduct from coal fired thermal power stations and the enormouslyincreasing amount of fly ash is a growing environmental problem. Herein, we report the investigationson EMI shielding and dielectric properties of synthesized polyaniline/fly ash (PAni/FA) composites.The spectroscopic characterizations of PAni/FA composites were performed using Fouriertransform infrared (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM).The EMI shielding measurements were carried out in the frequency range of 8-12 GHz (X-Band),relevant for practical applications. The shielding analysis demonstrates that the presence offly ash in the polyaniline matrix facilitates strong dipole interaction due to the formation of higherinterfacial area and porous network, which leads to high shielding effectiveness (SE) in the