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Studies on Non‐natural Deoxyammonium Cellulose
Author(s) -
Heinze Thomas,
Koschella Andreas,
Brackhagen Meinolf,
Engelhardt Jürgen,
Nachtkamp Klaus
Publication year - 2006
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200651206
Subject(s) - cellulose , tosyl , degree of polymerization , chemistry , polymer chemistry , hemicellulose , moiety , reagent , reactivity (psychology) , organic chemistry , polymerization , fourier transform infrared spectroscopy , chemical modification , polymer , chemical engineering , medicine , alternative medicine , pathology , engineering
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 NaBH 4 /CoBr 2 /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.