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Efficient Homogeneous Chemical Modification of Bacterial Cellulose in the Ionic Liquid 1-N-Butyl-3-methylimidazolium Chloride

✍ Scribed by Kerstin Schlufter; Hans-Peter Schmauder; Susann Dorn; Thomas Heinze

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
161 KB
Volume
27
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

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.

image^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.

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Application of 1-Allyl-3-(1-butyl)imidaz
Application of 1-Allyl-3-(1-butyl)imidazolium Chloride in the Synthesis of Cellulose Esters: Properties of the Ionic Liquid, and Comparison with Other Solvents
✍ Ludmila C. Fidale; Shirley Possidonio; Omar A. El Seoud 📂 Article 📅 2009 🏛 John Wiley and Sons 🌐 English ⚖ 342 KB

## Abstract The ionic liquid (IL), 1‐allyl‐3‐(1‐butyl)imidazolium chloride (AlBuImCl), has been synthesized and its properties determined. Increase in the temperature increased its conductivity and decreased its density, polarity, and viscosity. Microcrystalline cellulose (MCC), dissolves in this I