High consistency mechano-enzymatic pretreatment for kraft fibres: effect of treatment consistency on fibre properties
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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2020-06
Major/Subject
Mcode
Degree programme
Language
en
Pages
5311–5322
Series
Cellulose, Volume 27
Abstract
Fibre reactivity is essential for cellulose dissolution and derivatisation and a porous fibre structure is one key determinant for a highly reactive pulp. Mechanical and enzymatic treatments are known to improve fibre reactivity and more recently, the combination of mechano-enzymatic treatment has been shown to synergistically enhance the beneficial effect. The aim of this work was to do a systematic study on the effect of dry matter content during enzymatic modification of fibres and define the conditions that optimally improve fibre porosity. The combined mechano-enzymatic treatments at 15–25 w% consistency had the most pronounced effect on fibre porosity and morphology analysed by solute exclusion technique, nitrogen sorption and scanning electron microscopy. Light microscopy imaging confirmed that the combined mechano-enzymatic treatment at high consistency (> 10 w%) resulted in extensive fibrillation of the treated fibres which was not observed after sole mechanical or enzymatic treatments.Description
Keywords
Endoglucanase, Enzyme, Fibre modification, Fibre reactivity, High consistency, Porosity
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Citation
Rahikainen, J, Mattila, O, Maloney, T, Lovikka, V, Kruus, K, Suurnäkki, A & Grönqvist, S 2020, ' High consistency mechano-enzymatic pretreatment for kraft fibres : effect of treatment consistency on fibre properties ', Cellulose, vol. 27, pp. 5311–5322 . https://doi.org/10.1007/s10570-020-03123-8
