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Titel
Morphology and rheology of cellulose nanofibrils derived from mixtures of pulp fibres and papermaking fines
VerfasserColson, Jérôme ; Bauer, Wolfgang ; Mayr, Melanie ; Fischer, Wolfgang ; Gindl-Altmutter, Wolfgang
Erschienen in
Cellulose, Berlin, 2016, Jg. 23, H. 4, S. 2439-2448
ErschienenSpringer, 2016
SpracheEnglisch
DokumenttypAufsatz in einer Zeitschrift
Schlagwörter (EN)Homogenisation / Rheology / Pulp / Fibre length / Fines / Cellulose nanofibrils
ISSN1572-882X
URNurn:nbn:at:at-ubbw:3-1603 Persistent Identifier (URN)
DOI10.1007/s10570-016-0987-x 
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 Das Werk ist frei verfügbar
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Morphology and rheology of cellulose nanofibrils derived from mixtures of pulp fibres and papermaking fines [1.5 mb]
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Zusammenfassung (Englisch)

The rheological behaviour of homogenised fibres originally having different lengths was evaluated. For this purpose, mixtures of pulp fibres and fines were fibrillated mechanically without pre-treatment and characterised with regard to morphology and viscosity. It was found that, for all samples, a similar number of homogenisation passes was needed to reach a viscosity plateau. However, the value of the final viscosity differed significantly: homogenised suspensions derived from fines achieved only about 60 % of the viscosity of suspensions derived from pulp. Already after a few homogenisation cycles, no differences between the samples could be measured using optical devices, indicating that fibrillation on the nanometre scale was responsible for the distinct rheological behaviours. Atomic force microscopy measurements indicated significantly reduced fibril lengths for the suspensions derived from fines, which explains their reduced viscosity.

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