Electroconductive paper - a study of polymer deposition and conductivity influenced by sheet forming and fibre beating
2010 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 25, no 4, 473-480 p.Article in journal (Refereed) Published
A conducting polymer modified paper was produced by depositing poly(3,4-ethylenedioxy thiophene)/poly(4-styrene sulfonate) (PEDOT:PSS) and N-methylpyrrolidone blend onto dynamically-formed and handsheet-formed paper substrates. The effect of fibre beating on the conducting polymer deposition and the bulk conductivity of the coated papers was investigated. A bulk electrical conductivity of the order 10(-1) S/cm was, established for unbeaten samples coated with PEDOT:PSS dispersion. It was observed that the bulk conductivity of the coated papers depended on the quantity of PEDOT:PSS deposited; although at a lower polymer application, degree of fibre beating was of higher consequence. This was due to the increased surface contact of the highly refined and well-packed fibres which decreased the distance between PEDOT molecules. To understand the nature of the conductance, the location of the conducting polymer within the paper substrate was investigated by mercury porosimetry, nitrogen adsorption analysis and scanning electron microscopy. Results showed a preferential deposition of PEDOT:PSS at fibre crossings as a remnant of the wetting front. In addition, traces of PEDOT:PSS could be seen throughout the fibre network. Still, the detailed conductance process remains unknown as the presence and contribution of ions to conductance cannot be excluded. The influence of the deposited polymer on the physical behaviour of the substrate was examined by tensile index data and contact angle measurement. No detrimental effect of the water from the PEDOT:PSS solution was observed.
Place, publisher, year, edition, pages
2010. Vol. 25, no 4, 473-480 p.
Electroconductive paper, PEDOT:PSS, Coating, Polymer deposition, Fibre beating, Sheet forming
Research subject Chemical Engineering
IdentifiersURN: urn:nbn:se:kau:diva-40542ISI: 000285701900008OAI: oai:DiVA.org:kau-40542DiVA: diva2:904057