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Modified galactoglu...
Modified galactoglucomannans from forestry waste-water for films and hydrogels
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Lindblad, M. S. (author)
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- Dahlman, Olof (author)
- RISE,STFI-Packforsk
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Sjöberg, J. (author)
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Albertsson, A. -C (author)
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(creator_code:org_t)
- 2010-12-20
- 2009
- English.
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In: American Chemical Society Symposium Series (ACS). - Washington DC : American Chemical Society. - 0097-6156 .- 1947-5918. ; 1017, s. 185-198
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- 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.
Subject headings
- LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Trävetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Wood Science (hsv//eng)
Keyword
- Blending
- Cellulose
- Chemical modification
- Drug delivery
- Film preparation
- Hydrogels
- Oxygen
- Purification
- Softwoods
Publication and Content Type
- ref (subject category)
- art (subject category)
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