Journal
BIORESOURCE TECHNOLOGY
Volume 99, Issue 17, Pages 8118-8124Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2008.03.029
Keywords
eucalyptus CTMP; bio-modification; white-rot fungus Trametes hirsute; paper strengths; inter-fibre bonding
Funding
- Atlantic Innovation Fund (AIF) of Canada
- Canadian Foundation for Innovation (CFI)
- New Brunswick Innovation Fund (NBIF)
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White-rot fungus Trametes hirsute (T.h. 19-6) was used for modifying the eucalyptus CTMP fibres. Results show that the T.h. 19-6 removed mainly lignin (by 7.42%) and extractive (by 11.52%) after a short period of 5 days incubation. Due to the fungal degradation of the fibre wall materials, the middle lamella remainder on the fibre surface was significantly reduced and the fibre wall structure was loosened, which led to an increase in fibre internal bonding strength by 32% and an increase in handsheet tensile index and tear index by 49%, and 34%, respectively. A subsequent PFI refining process further amplified the fungal treatment effect, resulting in extensive fibre internal fibrillation. Compared with untreated pulp, fungus-treated pulp reached the same freeness levels with less PFI revolutions, indicating potential energy saving in the refining process. (C) 2008 Elsevier Ltd. All rights reserved.
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