Research On The Polymerization And Properties Of Nanostructured Polypyrrole

Due to the unique nanostructures and the outstanding physical chemical properties, conducting polymers have been widely used in various technological fields such as nanoelectronic devices, optoelectronic devices, electrode materials, metal protection etc. Recently, polypyrrole (PPy) has become one of the most studied and promising candidates among these conducting polymers, because of its excellent electrochemical characteristics. In this work, Polypyrrole nanotubes doped with methyl orange (MO) were prepared by oxidative chemical polymerization, and Fe(NO₃)₃ was used as the oxidant. It was found that the concentration of Fe(NO₃)₃ affected the dimension of the polypyrrole nanotubes and the stirring time would determine their morphology. Doping MO could remarkably enhance the conductivity of the nanotubes. The causes of these actions have been studied. Subsequently, we synthesized the special polypyrrole nanoclips in a inverse microemulsion formed by CTAB, APS, HCl and pyrrole, then we also have investigated the effects of reagents and environmental conditions. The test data indicates that the concentration of CTAB made a great impact on the appearance and the conductivity of the nanoclips. The temperature also affected their forming process. Finally, the polypyrrole nanotubes and nanoclips were coated on working electrodes to make up as modified electrodes. Testified by cyclic voltammetry, the polypyrrole nanotubes modified electrode possesses favorable redox reversibility, which fits for applying as electrode materials. However, the nanoclips nanotubes modified electrode possesses lower redox reversibility, but also reversible.