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Fractionation and characterization of lignin-carbohydrate complexes (LCCs) from eucalyptus fibers
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Wood Chemistry and Pulp Technology.
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Wood Chemistry and Pulp Technology.
2011 (English)In: Holzforschung, ISSN 0018-3830, E-ISSN 1437-434X, Vol. 65, no 1, 43-50 p.Article in journal (Refereed) Published
Abstract [en]

The effect of milling time on the structure of lignin was investigated by analyzing the quantity and molecular size distribution of thioacidolysis products obtained from wood and pulp of eucalypt (Eucalyptus globulus). After milling, the ability of three solvent systems was determined to completely dissolve the wood or pulp meal. It was found that a mixture of DMSO and 50% aqueous tetrabutylammonium hydroxide was superior to either dimethylacetamide-LiCl or DMSO-tetrabutylammonium fluoride as solvent. By applying the minimum milling time required for complete dissolution, structurally unaltered wood or pulp could be further separated into lignin-carbohydrate fractions. These were analyzed by thioacidolysis. From eucalypt pulp, two different lignin-carbohydrate fractions were obtained, one glucan-and one xylan-enriched fraction, with the latter having more syringyl units in its lignin moieties. The developed solvent system seems to be universal because spruce and flax fibers and pulps could also be dissolved in it after milling.

Place, publisher, year, edition, pages
2011. Vol. 65, no 1, 43-50 p.
Keyword [en]
ball milling, cellulose solvents, Eucalyptus globulus, kraft pulp, lignin-carbohydrate complex (LCC), lignin structure, size exclusion chromatography (SEC), thioacidolysis
National Category
Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:kth:diva-31350DOI: 10.1515/HF.2011.013ISI: 000286182500006Scopus ID: 2-s2.0-78651448103OAI: oai:DiVA.org:kth-31350DiVA: diva2:404453
Note
QC 20110317Available from: 2011-03-17 Created: 2011-03-14 Last updated: 2017-12-11Bibliographically approved

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