Fundamental physical aspects on lignin dissolution
2002 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, Vol. 17, no 4, 370-373 p.Article in journal (Refereed) Published
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 act 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 175degreesC, the adsorption of KL was LIP 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, 370-373 p.
kraft lignin, bleached softwood fibres, adsorption, coagulation, hydroxide concentration, ionic strength, temperature, kraft lignin, nmr
IdentifiersURN: urn:nbn:se:kth:diva-22205ISI: 000180616600002OAI: oai:DiVA.org:kth-22205DiVA: diva2:340903
QC 201005252010-08-102010-08-10Bibliographically approved