Hot-water extraction and characterization of spruce bark non-cellulosic polysaccharides
2012 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, Vol. 27, no 1, 18-23 p.Article in journal (Refereed) Published
Non-cellulosic polysaccharides (NCP) from bark offer large potential as a class of natural raw materials for functional materials development and production of biochemicals. We have elaborated a process for sequential extraction of NCP from industrial Norway spruce bark using an accelerated solvent extraction (ASE) with water at 100 to 160°C. Carbohydrates, Klason lignin and ash content as well as size-exclusion chromatography (SEC) analyses were performed for all hot-water extracts. NCP were mainly composed of glucose, arabinose and galacturonic acid units which revealed the presence of starch, arabinose-rich hemicelluloses and pectins. In total, the industrial bark of Norway spruce contained up to 20% of NCP which were extracted with pressurized hot water. NCP were mainly extractable at 140°C and started to undergo degradation at higher temperature.
Place, publisher, year, edition, pages
2012. Vol. 27, no 1, 18-23 p.
Biorefinery, Hemicelluloses, Norway spruce, Pectins
Polymer Chemistry Other Chemistry Topics
IdentifiersURN: urn:nbn:se:kth:diva-78427DOI: 10.3183/NPPRJ-2012-27-01-p018-023ISI: 000311019900002ScopusID: 2-s2.0-84860166306OAI: oai:DiVA.org:kth-78427DiVA: diva2:492476
QC 201206272012-02-082012-02-082013-01-09Bibliographically approved