Inhomogeneities in the chemical structure of spruce lignin
2003 (English)In: Holzforschung, ISSN 0018-3830, Vol. 57, no 2, 165-170 p.Article in journal (Refereed) Published
Thioacidolysis, periodate oxidation and size exclusion chromatography (SEC) were used for the analysis of spruce lignin samples. The standard thioacidolysis method was modified by including a pre-swelling of the lignocellulosic sample before the reaction, and this gave a higher yield of monomer products. Middle lamella and compression wood lignin was found to contain a larger amount of oligomers after thioacidolysis than normal wood lignin. Analysis by thioacidolysis of a thermomechanical pulp (TMP) revealed that approximately 10% of the beta-O-4 structures in the lignin were cleaved due to the mechanical grinding effect. From kraft pulp, the mixture of thioacidolysis products contains a major fraction having a considerably larger molecular mass than the products from spruce wood and TMP. The structure of this material is still unknown.
Place, publisher, year, edition, pages
2003. Vol. 57, no 2, 165-170 p.
degradation, inhomogeneities, lignin, middle lamella, secondary wall, size exclusion chromatography, spruce, thioacidolysis, thermomechanical pulp, middle-lamella, secondary wall, picea-abies, thioacidolysis, tracheids, wood
IdentifiersURN: urn:nbn:se:kth:diva-22362DOI: 10.1515/HF.2003.025ISI: 000181797800008OAI: oai:DiVA.org:kth-22362DiVA: diva2:341060
QC 201005252010-08-102010-08-10Bibliographically approved