Enzyme catalyzed cross-linking of spruce galactoglucomannan improves its applicability in barrier films
2013 (English)In: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, Vol. 95, no 2, 690-696 p.Article in journal (Refereed) Published
Hemicelluloses are one of the main constituents of plant cell walls and thereby one of the most abundant biopolymers on earth. They can be obtained as by-products from different wood based processes, most importantly from the mechanical pulping. Hemicelluloses have interesting properties in e.g. barrier film applications. However, their relatively low molecular weight after isolation and co-extraction with lignin has limited their use. In this work, we present a novel technique for increasing the molecular weight of different wood hemicelluloses from mechanical pulping process waters as well as from pre-hydrolysis extracts. This is achieved by enzyme-catalyzed cross-linking of aromatic moieties bound to the hemicelluloses. The cross-linking treatment resulted in significantly improved mechanical properties in barrier films made with spruce galactoglucomannan. To our knowledge, this is the first time that wood hemicelluloses have been cross-linked by utilizing the bound aromatic moieties and creates new possibilities for utilizing this raw material source.
Place, publisher, year, edition, pages
2013. Vol. 95, no 2, 690-696 p.
Hemicellulose, Laccase, Cross-linking, Barrier film, Mechanical pulping
IdentifiersURN: urn:nbn:se:kth:diva-124444DOI: 10.1016/j.carbpol.2013.03.016ISI: 000319644900012ScopusID: 2-s2.0-84877578791OAI: oai:DiVA.org:kth-124444DiVA: diva2:636458
FunderSwedish Research Council, 621-2008-4177
QC 201307102013-07-102013-07-052014-08-25Bibliographically approved