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Interactions of ionic liquids with polysaccharides 9. Hydroxyalkylation of cellulose without additional inorganic bases |
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| Authors: | Sarah K?hler Tim Liebert Thomas Heinze Antje Vollmer Petra Mischnick Eugen M?llmann Winfried Becker |
| Affiliation: | (1) Pall Filtersystems GmbH, Planiger Stra?e 137, 55543 Bad Kreuznach, Germany;(2) Centre of Excellence for Polysaccharide Research, Friedrich Schiller University of Jena, Humboldtstra?e 10, 07743 Jena, Germany;(3) TU Braunschweig, Institut f?r Lebensmittelchemie, Schleinitzstr. 20, 38106 Braunschweig, Germany;(4) ShinEtsu/SE Tylose GmbH & Co. KG TRD, Product & Process Development, Rheingaustra?e 190-196, 65203 Wiesbaden, Germany; |
| Abstract: | Water-soluble hydroxyalkyl cellulose with a molar degree of substitution of up to 2.79 was prepared under completely homogeneous reaction conditions in various ionic liquids without addition of inorganic bases. In acetate containing solvents the IL acts as a catalyst. The substitution patterns of the cellulose ethers were analyzed by 13C NMR spectroscopy, 1H NMR spectroscopy after peracetylation and GLC/MS after permethylation and depolymerization. A diminished tendency towards the formation of side chains compared to heterogeneously prepared hydroxyalkyl celluloses in the presence of inorganic bases was found. |
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