Effect of Enzymatic Depolymerization of Cellulose and Hemicelluloses on the Direct Dissolution of Prehydrolysis Kraft Dissolving Pulp
Loading...
Access rights
openAccess
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal
View/Open full text file from the Research portal
Other link related to publication
View publication in the Research portal
View/Open full text file from the Research portal
Other link related to publication
Date
2021-11-08
Major/Subject
Mcode
Degree programme
Language
en
Pages
9
4805-4813
4805-4813
Series
Biomacromolecules, Volume 22, issue 11
Abstract
Prehydrolysis kraft (PHK) pulps account for more than half of the global market of dissolving pulp. Characterized by high reactivity toward dissolution, their performances can still be improved by activation treatments. This study compares the dissolution kinetics in cupriethylenediamine of a hardwood and a softwood PHK pulps before and after their activation by high-solid-content mechano-enzymatic treatments. Three enzyme combinations were tested: endoglucanase (E), xylanase and mannanase (XM), and endoglucanase, xylanase, and mannanase (EXM). Xylanase and mannanase reduced the hemicellulose content of only hardwood (by max. 2.4%). Mixing and carbohydrate depolymerization decreased the dissolution time of hardwood and softwood pulps by a maximum of 63 and 30% with E, 37 and 16% with XM, and 44 and 30% with EXM, respectively. The shortening of the dissolution time was partially hindered by hornification, which increased with hemicellulose degradation. Interestingly, XM accelerated the dissolution while preserving a high weight-average molecular mass.Description
The authors would like to thank the financial support from Stora Enso and Aalto University. D.S. gratefully acknowledges funding from the Academy of Finland’s Flagship Programme under the projects no. 318890 and 318891 (Competence Center for Materials Bioeconomy, FinnCERES).
Keywords
Other note
Citation
Ceccherini , S , Ståhl , M , Sawada , D , Hummel , M & Maloney , T 2021 , ' Effect of Enzymatic Depolymerization of Cellulose and Hemicelluloses on the Direct Dissolution of Prehydrolysis Kraft Dissolving Pulp ' , Biomacromolecules , vol. 22 , no. 11 , pp. 4805-4813 . https://doi.org/10.1021/acs.biomac.1c01102
