Spruce bark hemicelluloses and pectins: extraction and characterization
2011 (English)In: 16th International Symposium on Wood, Fiber and Pulping Chemistry Proceedings Vol. I: Tianjin, China June 8-10, 2011, 2011, 103-106 p.Conference paper (Other academic)
In industrial spruce bark, up to 20 % of the dry mass consists of non-cellulosic polysaccharides. These polysaccharides can easily be extracted with pressurized hot water and have a large potential as a starting polymeric biomass for functional materials development.
In this study, spruce bark was collected directly after the debarking process. The different steps of extraction were performed in an Accelerated Solvent Extractor (ASE). Bark was first extracted with acetone at 100 °C to remove extractives. Spruce bark polysaccharides could then be extracted with pressurized water at 100-160 °C with the highest yield at 140 °C. They were mainly composed of glucose, arabinose and galacturonic acid units which revealed the presence of pectic substances, starch and arabinose-rich hemicelluloses, e.g. arabinans. Molecular weight estimations showed the presence of rather large polysaccharides with a Mw varying between 10 to 30 kDa, depending of the extraction conditions.
Place, publisher, year, edition, pages
2011. 103-106 p.
bark, hemicelluloses, pectins, biorefinery, Norway spruce
Polymer Chemistry Other Chemistry Topics
IdentifiersURN: urn:nbn:se:kth:diva-78255ScopusID: 2-s2.0-84855696710OAI: oai:DiVA.org:kth-78255DiVA: diva2:492441
16th International Symposium on Wood, Fiber and Pulping Chemistry, Tianjin, China June 8-10, 2011
QC 201202152013-04-222012-02-082013-04-29Bibliographically approved