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Efficient Homogeneous Chemical Modification of Bacterial Cellulose in the Ionic Liquid 1‐ N ‐Butyl‐3‐methylimidazolium Chloride
Author(s) -
Schlufter Kerstin,
Schmauder HansPeter,
Dorn Susann,
Heinze Thomas
Publication year - 2006
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200600463
Subject(s) - ionic liquid , cellulose , chloride , degree of polymerization , chemical modification , chemistry , polymer chemistry , nuclear magnetic resonance spectroscopy , bacterial cellulose , polymerization , fourier transform infrared spectroscopy , organic chemistry , nuclear chemistry , catalysis , polymer , chemical engineering , engineering
Summary: Bacterial cellulose (BC), a unique type of cellulose, with high degree of polymerization of 6 500 could be dissolved easily in the ionic liquid 1‐ N ‐butyl‐3‐methylimidazolium chloride. For the first time, well‐soluble BC acetates and carbanilates of high degree of substitution (up to a complete modification of all hydroxyl groups) were accessible under homogeneous and mild reaction conditions. Characterization of the new BC derivatives by NMR and FTIR spectroscopy shows an unexpected distribution of the acetyl moieties in the order O‐6 > O‐3 > O‐2.13 C NMR spectrum (DMSO‐ d 6 ) of a cellulose acetate with a DS of 2.25 synthesized in 1‐ N ‐butyl‐3‐methylimidazolium chloride.