Hemicellulose/poly(2-hydroxyethyl methacrylate) (PHEMA)-based hydrogels were prepared by the radical polymerization of HEMA with hemicellulose purposely modified with well-defined amounts of methacrylic functions using a redox initiator system. Oligomeric hydrosoluble hemicelluloses produced from spruce chips were used for modification studies. The chemical modification of hemicellulose was performed with 2-[(1-imidazolyl)formyloxy]ethyl methacrylate as a modifying agent and triethylamine as the catalyst. The kinetics of the modification reaction was monitored by means of 1H NMR spectroscopy. The resulting hydrogels obtained after a 30 min reaction were homogeneous, elastic, and transparent materials.

Biodegradable polymers from renewable sources : new hemicellulose-based hydrogels / M.S. Lindblad, E. Ranucci, A.C. Albertsson,. - In: MACROMOLECULAR RAPID COMMUNICATIONS. - ISSN 1022-1336. - 22:12(2001), pp. 962-967.

Biodegradable polymers from renewable sources : new hemicellulose-based hydrogels

E. Ranucci
Secondo
;
2001

Abstract

Hemicellulose/poly(2-hydroxyethyl methacrylate) (PHEMA)-based hydrogels were prepared by the radical polymerization of HEMA with hemicellulose purposely modified with well-defined amounts of methacrylic functions using a redox initiator system. Oligomeric hydrosoluble hemicelluloses produced from spruce chips were used for modification studies. The chemical modification of hemicellulose was performed with 2-[(1-imidazolyl)formyloxy]ethyl methacrylate as a modifying agent and triethylamine as the catalyst. The kinetics of the modification reaction was monitored by means of 1H NMR spectroscopy. The resulting hydrogels obtained after a 30 min reaction were homogeneous, elastic, and transparent materials.
dextran hydrogels; acetylation; protein; release; system; wood
Settore CHIM/04 - Chimica Industriale
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/188471
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