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The use of carboxymethylcellulose (CMC) in polypyrrole (PPy) synthesis and in the production of PPy freestanding films was investigated. PPy was synthesised by chemical oxidative polymerisation in aqueous solutions using ammonium persulfate (APS) as oxidant and CMC as conductivity enhancer (CMC d ). CMCs with different molar weight, namely 90,000 and 250,000g/mol, were tested. The influence...
Polypyrrole was chemically synthesised by using, for the first time, Birchwood xylan as additive, and ammonium peroxydisulfate (APS) as oxidant. The impact of additive concentration, polymerisation time and reagents concentration on PPy conductivity was studied. It was shown that, once fixed the pyrrole (Py)/APS and Py/xylan optimal ratios, the best conductivities (26 S/cm) were obtained for short...
Polypyrrole was polymerized on the surface of cellulose fibres using a sequence of fibre impregnation in FeCl3 solutions, thickening and re-dispersion in a pyrrole solution. ζ-Potential and adsorption isotherms of the FeCl3-cellulose systems showed that the adsorption of iron III was associated with the formation of free Fe3+ cations in the impregnation liquor. Moreover, under the test conditions...
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