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Fundamental Physical Aspects on Lignin Dissolution
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.ORCID iD: 0000-0003-3407-7973
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
Responsible organisation
2002 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 17, no 4, p. 370-373Article in journal (Refereed) Published
Abstract [en]

The aggregation of diluted kraft lignin (KL) solutions was studied by turbidity measurements at elevated temperatures, various sodium chloride and sodium hydroxide concentrations. Since adsorptive processes usually precede self-aggregation in macromolecular systems as the solution conditions get worse, the interaction between KL and pulp fibres was also investigated. When treating samples of fully bleached softwood pulp fibres in KL solutions under various solution conditions, the light-absorption coefficient increased and the brightness was found to decrease rapidly above pOH 1, as the temperature was elevated. At pOH 2 and 175°C, the adsorption of KL was up to about 6 mg g-1. The results are also discussed theoretically in terms of lignin solubility and lignin coagulation.

Place, publisher, year, edition, pages
2002. Vol. 17, no 4, p. 370-373
Keywords [en]
kraft lignin, adsorption, cellulose, ionic strength, alkalinity, temperature
National Category
Chemical Engineering
Identifiers
URN: urn:nbn:se:miun:diva-1855DOI: 10.3183/NPPRJ-2002-17-04-p370-373ISI: 000180616600002Scopus ID: 2-s2.0-0036950616Local ID: 643OAI: oai:DiVA.org:miun-1855DiVA, id: diva2:26887
Available from: 2008-09-30 Created: 2009-07-09 Last updated: 2017-12-13Bibliographically approved

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Norgren, MagnusEdlund, Håkan

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CiteExportLink to record
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