Polymer Science and Engineering(10 Plenary Forums-1Event)

Biography

Biography: M V N Ambika prasad

Abstract

The  Polyaniline (PANI) has emerged as one of the most promising conducting polymers, because of its wide spread applications and due to the combination of unique properties like simple preparation and doping procedure, good environmental stability, relatively high conductivity and low cost. The inorganic–organic composites containing polymer as the organic base and Gallium  oxide, Vanadium Pentoxide and  Indium oxide as inorganic part have been used for studying its gas sensing. These composites have been synthesized by insitu deposition technique by placing fine grade Ga₂O₃, In₂O₃ and V₂O₅  in polymerization mixture of aniline. The results are well supported by FTIR spectra, SEM, XRD and Conductivity measurements. High temperature, conductivity measurements show thermal activated behavior. It is observed that electrical resistance increases with an increase in the temperature. In case of PANI-V₂O₅,PANI-In₂O₃ and PANI-Ga₂O₃ composites both the PANI sensing mechanism of swelling and sensing mechanism of surface charge are responsible for variation of resistance within the sensing material. Therefore, it is observed that PANI-V₂O₅,PANI-In₂O₃ and PANI-Ga₂O₃ composites to be a competent sensing material for LPG  and this may be due to formation of surface charge and presence of capillary pores. Similar behavior for the Polymer / Nano metal oxide composites such has Polyaniline-Tungsten oxide, Polyaniline-Cobalt oxide and Polyaniline- Cerium oxide have been observed  for  its humidity and Gas sensing. Similarly,conducting polymers have found to have applications in Biology in Bio sensors,anti bacterial  action, pigeon pea plant growth, microwave absorbers etc.