polypyrrole composites free encyclopedia

Inverted emulsion pathway to polypyrrole and polypyrrole elastomer ...A new method is proposed for the preparation of polypyrrole and polypyrrole-elastomer composites. An inverted emulsion of water containing the oxidant (FeCl3) in a solution (toluene, or a mixture of toluene and isooctane) of the host polymer (styrene-butadiene-styrene (SBS) triblock copolymer), or free of the host polymer, was first generated. The bis(2-ethylhexyl)sodium sulfosuccinate (AOT) surfactant was used as dispersant. A solution of pyrrole in toluene was introduced dropwise ...

Coreshell sulfur@polypyrrole composites as high-capacity ...In order to explore the potential application of sulfur in aqueous rechargeable batteries, coreshell sulfurpolypyrrole (S@PPy) composites were prepared through a novel one-pot and surfactant-free method. Sulfur exhibits a very high capacity of 473 mA h g1 and good cycling stability in an aqueous Li2SO4 el.

Spectroscopic Characterization of Carbon Nanotube-Polypyrrole ...15 Jul 2014 ... The resulting composites were characterized by transmission electronic microscopy (TEM) and by resonance Raman spectroscopy (exc. = 514.5, 632.8, and 785 nm). ... A novel photocatalytically active mesoporous metal-free PPy grafted MWCNT nanocomposite. Balakumar Vellaichamy ... Globular Shaped polypyrrole Doped Well-Dispersed Functionalized Multiwall Carbon Nanotubes/Nafion Composite for Enzymatic Glucose Biosensor Application. Bishnu Kumar ...

Conductive polymer - WikipediaConductive polymers or, more precisely, intrinsically conducting polymers (ICPs) are organic polymers that conduct electricity. Such compounds may have metallic conductivity or can be semiconductors. The biggest advantage of conductive polymers is their processability, mainly by dispersion. Conductive polymers are generally not thermoplastics, i.e., they are not thermoformable. But, like insulating polymers, they are organic materials. They can offer high electrical conductivity but ...

Electrical characteristics of polypyrrole composites at microwave ...Abstract. The microwave absorption and reflection characteristics of composites of polypyrrole with paper, cotton cloth and polyester fabrics have been evaluated. Refiectivity measurements in the range 218 GHz and plane wave modelling have revealed impedance charateristics with a common transition rgion. Relationships between substrate material, polymer loading and electrical performacne have been explored. Polarisation characteristics have alos been measured.

Two-step electrochemical synthesis of polypyrrole/reduced ... - NCBIACS Appl Mater Interfaces. 2014 Sep 24;6(18):16249-56. doi: 10.1021/am5044483. Epub 2014 Sep 8. Two-step electrochemical synthesis of polypyrrole/reduced graphene oxide composites as efficient Pt-free counter electrode for plastic dye-sensitized solar cells. Liu W(1), Fang Y, Xu P, Lin Y, Yin X, Tang G, He M. Author information: (1)Department of Chemistry, School of Science, Beijing University of Chemical Technology , Beijing 100029, P. R. China. polypyrrole/reduced ...

Graphene oxide/polypyrrole composites for highly selective ...Graphene oxide/polypyrrole (GO/PPy) composites were synthesized via a dielectric barrier discharge (DBD) plasma technique in nitrogen conditions, and characterized by scanning electron microscopy (SEM), Raman spectroscopy, thermal gravimetric analysis (TGA), Fourier transformed infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). The sorption of U(VI) ions on GO/PPy composites from aqueous solutions was investigated as a function of contact time, pH ...

A Chemically Polymerized Electrically Conducting Composite of ...16 Jun 2011 ... A variety of cell types respond to electrical stimuli, accordingly many conducting polymers (CPs) have been used as tissue engineering (TE) scaffolds, one such CP is polypyrrole (PPy). PPy is a well studied biomaterial with potential TE applications due to its electrical conductivity and many other beneficial properties. Combining its characteristics with an elastomeric material, such as polyurethane (PU), may yield a hybrid scaffold with electrical activity and significant ...