Abstract
Abstract Polyaniline-poly vinyl alcohol (PANI-PVA) conducting blends containing 15 wt% aniline were synthesized by in situ polymerization of aniline. Three-phase polymer blended nanocomposites with different contents of magnetite (5, 10 and 15 wt.%) were also synthesized. We measured the current-voltage (I-V) curves for the conducting blend and its magnetite nanocomposite. We also measured their thermal stability, and performed kinetic analysis through thermogravimetric analysis. We observed that the three phase nanocomposites showed enhanced electrical conductivity compared with that of the conductive blend, and no electrical hysteresis. The PVA/PANi blend was more stable above 350∘C and the addition of Fe3O4 enhanced the thermal stability of the conductive blend. The apparent activation energy of the three phase nanocomposites was greater than those of both the pure PVA and PVA/PANi samples. These results suggest that such three phase nanocomposites could be used in a range of applications.
Highlights
Magnetic nanoparticles have various characteristics that have drawn considerable research interest, in terms of Intrinsically conducting polymers (ICPs), are long range conjugated polymers with the ability to conduct an electrical current
We investigate the electrical and thermal stability of polyvinyl alcohol (PVA)/PANI blends and nanocomposites with magnetite nanoparticles
For the PVA/PANi conductive blend loaded with 10 wt% and 15 wt% Fe3O4, no electrical hysteresis appeared, whereas hysteresis appeared in the I-V characteristics of PVA/PANi and 5 wt% Fe3O4 samples
Summary
Magnetic nanoparticles have various characteristics that have drawn considerable research interest, in terms of Intrinsically conducting polymers (ICPs), are long range conjugated polymers with the ability to conduct an electrical current. Conferring magnetic properties to intrinsically nonmagnetic ICPs has recently drawn the attention of many researchers [8]. ICP-based magnetic conducting polymer composites have a wide scope of applications. These applications extend from replacing conventional magnetic polymer-composites to more sophisticated electronic applications. Such composites are regarded as attractive alternatives for microwave applications and electromagnetic interference shielding [9,10,11,12,13]
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