New hemicellulose-based hydrogels
2004 (English)In: HEMICELLULOSES: SCIENCE AND TECHNOLOGY / [ed] Gatenholm, P; Tenhanen, M, WASHINGTON: AMER CHEMICAL SOC , 2004, Vol. 864, 347-359 p.Conference paper (Refereed)
Different kinds of hemicellulose-based hydrogels have been made by radical polymerization using hydrosoluble hemicellulose from spruce chips with a number-average molecular weight and polydispersity of 2400 and 1.5 respectively. 80% of the hemicellulose was galactoglucomannan. and the remainder mainly 4-O-methylglucuronoxylan. Hemicellulose/poly(2-hydroxyethyl methacrylate) based hydrogels were prepared by polymerization in water of 2-hydroxyethyl methacrylate with hemicellulose modified with well-defined amounts of methacrylic functions. The chemical modification of hemicellulose was performed in dimethyl sulfoxide using 2[(l-imidazolyl) formyloxy]ethyl methacrylate as modifying agent. The kinetics of the modification reaction were monitored by H-1 NMR. The degree of modification of the hemicellulose used for the hydrogel synthesis varied from 10% to 40%. The ratio of modified hemicellulose to 2-hydroxyethyl methacrylate in the hydrogels was 1: 1 by weight. The resulting hydrogels were elastic, homogeneous, soft, transparent and easily swollen in water.
Place, publisher, year, edition, pages
WASHINGTON: AMER CHEMICAL SOC , 2004. Vol. 864, 347-359 p.
, ACS SYMPOSIUM SERIES, ISSN 0097-6156 ; 864
dextran, polymers, wood
IdentifiersURN: urn:nbn:se:kth:diva-23039ISI: 000187496800022ScopusID: 2-s2.0-38849173827ISBN: 0-8412-3842-1OAI: oai:DiVA.org:kth-23039DiVA: diva2:341737
1st International Symposium on Xylans, Mannans and Other Hemicelluloses. ORLANDO, FLORIDA. APR, 2001
QC 20100525 QC 201110312010-08-102010-08-102011-10-31Bibliographically approved