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Exploring enzymatic treatments for the production of dissolving grade pulp from different wood and non-wood paper grade pulps 10th EWLP, Stockholm, Sweden, August 25–28, 2008
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David Ibarra
Veröffentlicht/Copyright:
15. November 2009
Abstract
The feasibility of producing dissolving grade pulps for viscose production from different fiber raw materials, such as paper grade pulps from wood and non-woody plants, was investigated. Commercial dried bleached hardwood kraft pulps from eucalypt, and bleached non-wood soda/AQ pulps from flax, hemp, sisal, abaca, and jute, were subjected to enzymatic and chemical pre-treatments in order to improve the accessibility and reactivity of cellulose and to reduce their hemicellulose content. A commercial monocomponent endoglucanase and a commercial xylanase were employed for biochemical treatment. The chemical treatment consisted of cold alkaline extraction. The effects of these pre-treatments on pulps were studied by reactivity, according to Fock's method, and viscosity measurements, determination of hemicellulose content, and recording of molecular weight distributions. The results were compared to those of commercial bleached eucalypt dissolving pulp. Eucalypt and sisal pulps showed high improvement in reactivity, reaching levels near or even higher than that of the eucalypt dissolving pulp (65%–70%), and a low hemicellulose content (2%–4%), when both were submitted to a sequence of treatments consisting of an initial xylanase treatment followed by cold alkaline extraction, and a final endoglucanase treatment. However, the viscosity decreased considerably. A uniform and narrow molecular weight distribution was observed in both eucalypt and sisal pulps after this sequential pre-treatment.
Keywords: dissolving grade pulp; endoglucanase; non-woody plants; paper grade pulp; reactivity; regenerated cellulose; size exclusion chromatography (SEC); viscose; wood; xylanase
Received: 2008-11-28
Accepted: 2009-3-5
Published Online: 2009-11-15
Published Online: 2009-07-31
Published in Print: 2009-11-01
©2009 by Walter de Gruyter Berlin New York
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Artikel in diesem Heft
- Original Papers
- Effects of selected key chromophores on cellulose integrity upon bleaching 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- A novel, mild and selective methylation of carboxyl groups in cellulosic pulps 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Effect of salts on the formation and properties of microcrystalline cellulose and chitosan gels 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Detection of muconic acid type structures in oxidised lignins using 2D NMR spectroscopy 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Synthesis of a lignin polymer model consisting of only phenolic β-O-4 linkages and testing its reactivity under alkaline conditions 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- HSQC-NMR analysis of lignin in woody (Eucalyptus globulus and Picea abies) and non-woody (Agave sisalana) ball-milled plant materials at the gel state 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Syringyl-type simple plant phenolics as mediating oxidants in laccase catalyzed degradation of lignocellulosic materials: Model compound studies 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Titration of free phenolic groups in pulps 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Interfacial properties of polyelectrolyte complexes incorporating kraft lignin 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Comparing soluble Trametes pubescens laccase and cross-linked enzyme crystals (CLECs) for enzymatic modification of cellulose 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Exploring enzymatic treatments for the production of dissolving grade pulp from different wood and non-wood paper grade pulps 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Effects of commercial cellobiohydrolase treatment on fiber strength and morphology of bleached hardwood pulp 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Prehydrolysis of Eucalyptus globulus Labill. hemicelluloses prior to pulping and fermentation of the hydrolysates with the yeast Pichia stipitis 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Activation of thermomechanical pulp by laccases as studied by UV-Vis, UV resonance Raman and FTIR spectroscopy 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Biological control of sapstain fungi: From laboratory experiments to field trials 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Study of the sorption-desorption properties of pine wood at the initial stage of decay by wood-rot fungi 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Decay susceptibility of Amazon wood species from Brazil against white rot and brown rot decay fungi 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Relations between chemical changes and mechanical properties of thermally treated wood 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Kinetics of SO2-ethanol-water pulping of spruce 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Study on desorption of Mn, Fe, and Mg from TMP and evaluation of the complexing strength of different chelating agents using side reaction coefficients 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Short Note
- Determination of self-diffusion coefficient and hydrodynamic radius of xylan by NMR diffusometry (NMRd) 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Meetings
- Meetings
- Contents Volume 63
- Contents Volume 63 (2009)
- Subject index
- Subject index
- Species index (scientific names)
- Species index (scientific names)
- Author index
- Author index
- Acknowledgement
- Acknowledgement
Schlagwörter für diesen Artikel
dissolving grade pulp;
endoglucanase;
non-woody plants;
paper grade pulp;
reactivity;
regenerated cellulose;
size exclusion chromatography (SEC);
viscose;
wood;
xylanase
Artikel in diesem Heft
- Original Papers
- Effects of selected key chromophores on cellulose integrity upon bleaching 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- A novel, mild and selective methylation of carboxyl groups in cellulosic pulps 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Effect of salts on the formation and properties of microcrystalline cellulose and chitosan gels 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Detection of muconic acid type structures in oxidised lignins using 2D NMR spectroscopy 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Synthesis of a lignin polymer model consisting of only phenolic β-O-4 linkages and testing its reactivity under alkaline conditions 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- HSQC-NMR analysis of lignin in woody (Eucalyptus globulus and Picea abies) and non-woody (Agave sisalana) ball-milled plant materials at the gel state 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Syringyl-type simple plant phenolics as mediating oxidants in laccase catalyzed degradation of lignocellulosic materials: Model compound studies 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Titration of free phenolic groups in pulps 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Interfacial properties of polyelectrolyte complexes incorporating kraft lignin 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Comparing soluble Trametes pubescens laccase and cross-linked enzyme crystals (CLECs) for enzymatic modification of cellulose 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Exploring enzymatic treatments for the production of dissolving grade pulp from different wood and non-wood paper grade pulps 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Effects of commercial cellobiohydrolase treatment on fiber strength and morphology of bleached hardwood pulp 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Prehydrolysis of Eucalyptus globulus Labill. hemicelluloses prior to pulping and fermentation of the hydrolysates with the yeast Pichia stipitis 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Activation of thermomechanical pulp by laccases as studied by UV-Vis, UV resonance Raman and FTIR spectroscopy 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Biological control of sapstain fungi: From laboratory experiments to field trials 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Study of the sorption-desorption properties of pine wood at the initial stage of decay by wood-rot fungi 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Decay susceptibility of Amazon wood species from Brazil against white rot and brown rot decay fungi 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Relations between chemical changes and mechanical properties of thermally treated wood 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Kinetics of SO2-ethanol-water pulping of spruce 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Study on desorption of Mn, Fe, and Mg from TMP and evaluation of the complexing strength of different chelating agents using side reaction coefficients 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Short Note
- Determination of self-diffusion coefficient and hydrodynamic radius of xylan by NMR diffusometry (NMRd) 10th EWLP, Stockholm, Sweden, August 25–28, 2008
- Meetings
- Meetings
- Contents Volume 63
- Contents Volume 63 (2009)
- Subject index
- Subject index
- Species index (scientific names)
- Species index (scientific names)
- Author index
- Author index
- Acknowledgement
- Acknowledgement
