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Modified galactoglucomannans from forestry waste-water for films and hydrogels
RISE, STFI-Packforsk.
2009 (English)In: American Chemical Society Symposium Series (ACS), ISSN 0097-6156, E-ISSN 1947-5918, Vol. 1017, 185-198 p.Article in journal (Refereed) Published
Abstract [en]

Hemicelluloses are among the most abundant natural polymers in the world and are consequently a potential source for sustainable materials, that has so far been underexploited. Galactoglucomannans are the principal hemicelluloses in softwoods and can be found in, for example, industrial wood processing waste-water. Currently, we are investigating the fractionation and purification of O-acetylgalactoglucomannans from newsprint and fiberboard mill waste-waters, as well as the preparation of new barrier films with low oxygen permeation and hydrogel materials from the fractions obtained. Self-supporting films have been formed by solution-casting. Interesting oxygen barrier and mechanical strength properties were achieved for films obtained from a physical blend of O-acetyl-galactoglucomannan and either alginate or carboxymethylcellulose. To create oxygen barrier films with high resistance towards moisture, benzylated derivatives of O-acetyl-galactoglucomannan were made. A hydrogel is a polymeric material that swells in water but does not dissolve, valuable for applications including drug delivery. In order to obtain the right properties, we performed tailored cross-linking to create a flexible network structure. The chemical modification procedure involves a methacrylation reaction carried out under mild conditions. Herein we review past work and present some new data on fractionation and purification of galactoglucomannans. © 2009 American Chemical Society.

Place, publisher, year, edition, pages
2009. Vol. 1017, 185-198 p.
Keyword [en]
Blending, Cellulose, Chemical modification, Drug delivery, Film preparation, Hydrogels, Oxygen, Purification, Softwoods
National Category
Wood Science
Identifiers
URN: urn:nbn:se:ri:diva-29626DOI: 10.1021/bk-2009-1017.ch010ScopusID: 2-s2.0-84872215569OAI: oai:DiVA.org:ri-29626DiVA: diva2:1105101
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cited By 3

Available from: 2017-06-02 Created: 2017-06-02 Last updated: 2017-06-09Bibliographically approved

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