Conversion of polyaniline from insulating to conducting state in aqueous viologen solutions

Article Abstract:

A study was conducted, by using the x-ray photoelectron spectroscopy, electron spin spectroscopy, UV-visible absorption spectroscopy and sheet resistance measurements, to investigate the interaction of polyaniline coatings on low-density polyethylene films with aqueous viologen solutions. The result shows that the polyaniline coating can be converted from the insulating base form to the electrically conducting salt from after reaction with the viologen solutions.

Unsupported plastics film & sheet, Unsupported Plastics Film and Sheet (except Packaging) Manufacturing, Polyethylene Film, Chemistry, Physical and theoretical, Physical chemistry, Aqueous solution reactions

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Nanoscale measurements of conducting domains and current-voltage characteristics of chemically deposited polyaniline films

Article Abstract:

The Spatial variations in electric conductivity and evolutions of band structures of polyaniline (PANI) films are studied by use of a so-called current-sensing atomic force microscope (CS-AFM) or atomic force microscope current image spectroscopy (AFM-CITS). The large spatial variations in the film conductivity on topographically featureless regions were tentatively attributed to the presence of nanoscale crystallites of polaron lattice.

Usage, Electrical conductivity, Atomic force microscopy

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Polymerization of aniline on polyaniline membranes

Article Abstract:

A new method is described for the preparation of polyaniline (PANI) by using aniline and oxidant solutions separated by a non-ionic semipermeable cellulose membrane. PANI is produced entirely on the aniline side of membrane, which is explained by the formation of a thin layer of PANI on the cellulose membrane that converts a cellulose membrane to a composite PANI-cellulose membrane.

Petroleum Refineries, Petroleum refining, Polymerization, Analysis, Dipole moments, Structure, Chemical properties

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