Electrically conductive epoxy/polyaniline composite fabrication and characterization for electronic applications

Abstract

This study reports on the electrical conductivity, dielectric, and electromagnetic interferenc (EMI) shielding properties of conductive epoxy/PAni blend containing various concentrations. Polyaniline (PAni) was synthesized using oxidative chemical polymerization technique and then dispersed into epoxy resin using a sonication bath. Infrared spectra confirm the curing of composites. Increasing the aspect ratio of PAni in epoxy increased the electrical conductivity and improves the microwave absorption properties of composites in the microwave range (0.1 GHz–20 GHz). Electrical conductivity was measured by using the four-probe method, and the maximum conductivity of the composite was achieved 3.51 × 10−13 Scm−1 with 30 wt% of PAni. The maximum porosity of the composite with 30 wt% of PAni was 15.5%. EMI shielding was measured by a vector network analyzer (VNA) in the microwave region (0.1 GHz–20 GHz), which gives the maximum value of 63 dB. IR shielding was measured by IR spectroscopy and less than 0.5% transmission was observed in NIR (700 nm–2500 nm) region. The average particle size of PAni is found to be 113 nm. These composites were used as a potential candidate for conductive coatings, EMI shielding purposes, and electronic applications.

Polyaniline/ZnO Hybrid Nanocomposite: Morphology, Spectroscopy and Optimization of ZnO Concentration for Photovoltaic Applications

“…Recently, hybrid polymer–inorganic nanocomposite-based solar cells have attained a PCE of 12% [ 11 ]. Furthermore, organic solar cells made of conjugated polymers and metal oxide semiconductors, such as TiO 2 , ZnO, SnO 2 , etc., are capable of superfast photo-induced charge transfer [ 12 , 13 ], as compared to individual materials [ 14 ].…”

“…These are some of the remarkable characteristics that PANI has successfully found its potential applications in, in many electronic and optoelectronic devices, including solar cells [ 16 ], sensors, thermoelectric devices, etc. [ 14 ].…”

Synthesis of Nickel Spinel Ferrites Nanoparticles Coated with Thermally Reduced Graphene Oxide for EMI Shielding in the Microwave, UV, and NIR Regions

“…EMI shielding at a high-frequency range requires the magnetic field to always be reversed to the original magnetic field produced by the current in excellent conductors [15][16][17][18][19][20][21][22]. This outstanding EMI shielding evaluates the usage of metals as well as magnetic nanomaterials to attenuate electric and magnetic field radiation [23][24][25][26][27][28][29][30]. Zubair et al synthesized thermally reduced graphene oxide (TRGO) and barium ferrites (BaFe) nanocomposites to improve the shielding efficiency solution casting method.…”

Electromagnetic interference shielding study in microwave and NIR regions by highly efficient Ag/ZnS and polyaniline-Ag/ZnS particles

“…1,2 Electromagnetic interferences by electromagnetic noise not only malfunctioning the electrical system but also causing the permanent manipulation of electrical circuits during the heat dissipation of thermally conductive nanomaterials when it is not properly functioning. [3][4][5] The effect of electromagnetic interferences is causing damage to the telecommunication system, electronic systems, and military application as well as creating problems to human health. 6,7 The electromagnetic interferences can be avoided by several shielding mechanisms that have been established.…”