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Studies on Non-natural Deoxyammonium Cellulose |
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| Authors: | Thomas Heinze Andreas Koschella Meinolf Brackhagen Jürgen Engelhardt Klaus Nachtkamp |
| Affiliation: | 1. Center of Excellence for Polysaccharide Research, Friedrich Schiller University of Jena, Humboldtstrasse 10, D-07743 Jena, Germany;2. Center of Excellence for Polysaccharide Research, Friedrich Schiller University of Jena, Humboldtstrasse 10, D-07743 Jena, Germany Member of the European Polysaccharide Network of Excellence (EPNOE), www.epnoe.eu;3. Wolff Cellulosics GmbH & Co. KG, Postfach 1662, D-29656 Walsrode, Germany |
| Abstract: | Summary: Ammonium group containing cellulose derivatives are prepared from homogeneously synthesized cellulose p-toluenesulfonic acid esters (tosyl cellulose) by conversion with sodium azide and subsequent reduction of the azido moiety applying NaBH4/CoBr2/2,2′-bipyridine as reagent. Regarding the tosylation, cellulose samples of different degree of polymerization and hemicellulose content possess a different reactivity. The deoxyamino cellulose is water soluble in the protonated state. Elemental analysis, FTIR- and NMR spectroscopy were carried out to analyze the degree of substitution and functionalization pattern. It was also studied to synthesize deoxyazido celluloses without isolation of the tosyl cellulose. However, a predominant formation of deoxychloro moieties occurs. |
| Keywords: | Biopolymers cellulose deoxyammonium cellulose deoxyazido cellulose NMR |