Rheological behavior of cellulose fiber suspensions / Didier Chaussy in Industrial & engineering chemistry research, Vol. 50 N° 6 (Mars 2011)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 50 N° 6 (Mars 2011) . - pp. 3524–3533 Titre : Rheological behavior of cellulose fiber suspensions : application to paper - making processing Type de document : texte imprimé Auteurs : Didier Chaussy, Auteur ; Celine Martin, Auteur ; Jean-Claude Roux, Auteur Année de publication : 2011 Article en page(s) : pp. 3524–3533 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Cellulose fiber Résumé : The refining operation of cellulose fibrous suspensions results in fibrillation, hydration, and shortening of fibers. To characterize the viscous behavior of such a suspension during processing, rheological properties of bleached softwood fibers are studied by considering a semi-industrial disk refiner as a parallel plate rheometer. The rheological behavior of fiber suspension is quantified and modeled using a modified Carreau−Yasuda equation. This model does not show discontinuities and enables the description of the pulp suspension behavior for the entire domain of shear rates (up to 2.1 × 106 s−1). It points out a Newtonian behavior or a combination of a Newtonian followed by a shear thinning behavior after a limiting shear rate. Moreover, the measured apparent viscosity of the fiber suspension in the gap clearance is about 100 times higher than the viscosity of individualized fibers suspension. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101591s [article] Rheological behavior of cellulose fiber suspensions : application to paper - making processing [texte imprimé] / Didier Chaussy, Auteur ; Celine Martin, Auteur ; Jean-Claude Roux, Auteur . - 2011 . - pp. 3524–3533. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 6 (Mars 2011) . - pp. 3524–3533 Mots-clés : Cellulose fiber Résumé : The refining operation of cellulose fibrous suspensions results in fibrillation, hydration, and shortening of fibers. To characterize the viscous behavior of such a suspension during processing, rheological properties of bleached softwood fibers are studied by considering a semi-industrial disk refiner as a parallel plate rheometer. The rheological behavior of fiber suspension is quantified and modeled using a modified Carreau−Yasuda equation. This model does not show discontinuities and enables the description of the pulp suspension behavior for the entire domain of shear rates (up to 2.1 × 106 s−1). It points out a Newtonian behavior or a combination of a Newtonian followed by a shear thinning behavior after a limiting shear rate. Moreover, the measured apparent viscosity of the fiber suspension in the gap clearance is about 100 times higher than the viscosity of individualized fibers suspension. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101591s

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