Extraction of polymers from enzyme-treated softwood
2011 (English)In: BioResources, ISSN 1930-2126, Vol. 6, no 4, 4606-4614 p.Article in journal (Refereed) Published
In a biorefinery context it is an advantage to fractionate and extract different wood components in a relatively pure form. However, one major obstacle for efficient extraction of wood polymers (lignin, polysaccharides etc.) is the covalent lignin-polysaccharide networks present in lignified cell walls. Enzymatic catalysis might be a useful tool for a controlled degradation of these networks, thereby enhancing the extraction of high molecular weight polymers. In this work, a methanol-alkali mixture was used to extract two different wood samples treated with endoxylanase and gammanase, respectively. Wood chips were pretreated with alkali prior to enzymatic treatment to enhance the cell-wall accessibility to enzymes. Extractions were also carried out on non-enzyme-treated samples to evaluate the enzymatic effects. Results showed that the enzymatic treatment increased the extraction yield, with gammanase as the more efficient of the two enzymes. Furthermore, polymers extracted from xylanase-treated wood had a higher degree of polymerization than the reference.
Place, publisher, year, edition, pages
2011. Vol. 6, no 4, 4606-4614 p.
Engineering and Technology
Research subject SRA - Production
IdentifiersURN: urn:nbn:se:kth:diva-49731ISI: 000298119500071ScopusID: 2-s2.0-84863040860OAI: oai:DiVA.org:kth-49731DiVA: diva2:460183
FunderXPRES - Initiative for excellence in production research
QC 201111302011-11-292011-11-292015-01-19Bibliographically approved