Studies of thermo-electric power and dielectric modulus of polypyrrole/zirconium oxide-molybdenum trioxide (PZM) composites

摘要

Abstract Zirconium oxide-molybdenum trioxide doped polypyrrole composites have been synthesized in the presence of ammonium persulphate (oxidizing agent), with different 15, 30, 45 and 60 wt% of zirconium oxide-molybdenum trioxide (ZM) in pyrrole, by the chemical polymerization (oxidation) process. The polypyrrole/zirconium oxide-molybdenum trioxide (PZM) composites have exhibited crystalline nature, which has been confirmed by powder X-ray diffraction patterns. The Fourier transform infrared graphs show that the stretching frequencies of the composites have shifted towards the lower frequency side. The scanning electron microscopy micrographs indicate that the composites are of spherical nature and form elongated chains; an increase in the particles size when compared with polypyrrole and ZM particles is also observed. Thermo electric power and transport properties studies reveal that there is an interaction between polypyrrole and the ZM particles and the weight percents of the ZM particles have an influence on the properties of the pure polypyrrole. Studies shown that, the PZM composites are good materials in conductivity, dielectric properties, micro power generator, thermo cooling, as semiconductors as well as may be in humidity, gas and thermal sensor.