Preparation And Characterization Of PPy-based Composites

A series of novel polymers with the conjugated structure have better properties in charge transportation. They could get good conductivity after proper doping. But the special chains structure leads to poor processibility, which limit their more widespread application.In this paper, description relating to the history of development, synthetic methods, and. mechanism of polymerization, chemical structure, dropped methods and mechanism of conductive polymers were reviewed. It also be discussed that about PPy-based composites. The research direction on polypyrrole in the near future was also previewed.The water-dispersed conductive polypyrroles (PPy) were prepared via the chemical oxidative polymerization with lignosulfonate (LGS), an inexpensive byproduct from pulp processing industries, as a dopant and template for tuning the properties of polypyrrole nanoparticles. The lignosulfonate doped polypyrrole (PPy/LGS) nanoparticles were characterized with Fourier transform infrared, UV vis, thermogravimetric analysis, X-ray diffraction, transmission electron microscopy, and electric conductivity.Composites consisting of conducting polypyrrole (PPy) and fly ash (FA) or amino-functionalized fly ash (A-FA) were prepared by the in situ chemical oxidative polymerization method, respectively. The surface functionalization of fly ash (FA) with amino groups was found to play an important role in the formation of the well-defined blackberry morphology. The composites were characterized with Fourier transform infrared, UV-vis, thermogravimetric analysis, x-ray diffraction, scanning electron microscopy, electric conductivity and magnetic properties.Halloysite nanotubes/polypyrrole (HNTs/PPy) nanocomposites were synthesized by the in situ chemical oxidative polymerization method based on self-assembled monolayer amine-functionalized HNTs. The HNTs/PPycoaxial tubular nanocompositeswere characterized with transmission electronmicroscope, x-radiffraction, thermogravimetric analysis, electrical conductivity measurement at differentemperatures, cyclic voltammetry, and galvanostatic charge-discharge measurements. The HNTs/PPy composites electrode were suggested their potential application in electrode materials for electrochemical capacitors.Polypyrrole/graphene nanosheet (PPy/GNS) nanocomposites with sheet morphology as electrode materials for supercapacitor were synthesized by using amine-functionalized the self-assembled monolayer (SAM) coated GNS particles by in-situ chemical oxidative polymerization method. The characterizations of the as-prepared PPy/SAM-GNS nanocomposites included the surface morphology analysis, electrical conductivity measurement at different temperatures, Raman spectroscopy analysis, thermal gravimetric analysis, cyclic voltammetry and galvanostatic charge-discharge measurement. The PPy/SAM-GNS nanocomposites electrodes were suggested their potential application in electrode material for electrochemical capacitors.