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Abstract: Conducting polymer–fibre composites with polypyrrole cellulose (paper) and protein (wool) fibres have been produced by polymerizing pyrrole with ferric chloride as the oxidant around separated individual cellulose (wood) fibres from bleached Pinus radiata Kraft pulp, and merino wool fibres respectively to generate new composite materials that retain the inherent properties of the polymer and individual fibres. For the polypyrrole–cellulose composite, the polypyrrole consisted of spheres of about 100nm in size fused together to form a continuous coating that fully encapsulates the cellulose fibre and associated finer fibrils. For the polypyrrole–wool composite the polypyrrole formed a similar coating of about 200nm spheres. Electrical conductivities of the composites were substantially increased over those of the precursor fibres. [Copyright &y& Elsevier]

Abstract: This paper reports sintering condition effect on an ink-jet printed conductive pattern of silver ink made on a cellulose paper. To fabricate the conductive pattern on the cellulose paper, silver ink is ink-jet printed and the influence of sintering temperature and time is investigated in terms of electrical resistivity and morphology by using scanning electron microscope and atomic force microscope. Two-level baking process composed of soft baking and hard baking is found to be effective for silver nanoparticle network. The sintering temperature and time are strongly associated with the conductivity of the ink-jet printed pattern. [Copyright &y& Elsevier]