Studies on Dual Phase Conducting Polyaniline Magnetic Micro and Nanocomposites

Abstract:

The conducting polymers are vital sources for fabrication of micro electronics chips, GMR sensors, membranes and flexible electrodes. Polyaniline is widely chosen for such products because of its conductivity range. This paper focuses on the studies of dual phase properties of Polyaniline (PANI) - Magnetic Iron Oxide (MIO) composites wherein MIO micro and nanoparticles were incorporated in polyaniline. This type of MIO-Polyaniline composites can enhance both conductive and magnetic property. Polyaniline was synthesized by redox polymerization technique with MIO both in micro and nanosize by in-situ polymerization. The MIO content was maintained at 0.2 to 0.6 gm with respect to 4.6 gm of aniline in polymerization reaction. The composites were characterized by FTIR, UV, XRD, SEM and VSM and conductivity unit. The saturation magnetization of composites was 0.0057 emu/g for 0.6 MIO micro spheres and 1.5507 emu/g for 0.6 MIO nanospheres. The DC conductivity values for pure PANI are 2.06x10^-2 S/cm , 5.13x10^-3 S/cm for PANI-0.6 micro MIO and 1.13x10^-3 S/cm for PANI-0.6 nanoMIO. Micro tubular structure was observed for PANI composite in SEM . It is evident that the electrical properties are altered significantly on tailoring MIO in microtubes and the magnetic property is altered by tuning the composition of MIO from micro to nanorange. These composites will satisfy the properties for applications such as actuators, supercapacitors, EMI shielding, Fuel cells and Sensors. Key words: Polyaniline, Microtubes, Magnetic iron oxide, DC conductivity

• Periodical: Advanced Materials Research (Volume 938)
• Pages: 158-163
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.938.158
• Online since: June 2014
• Authors: Vikram Srinivas, Vasanthakumari Raju*, Louie Joseph, Javith Syed
• Keywords: DC Conductivity, Magnetic Iron Oxide, Microtubes, Polyaniline

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