Journal
MACROMOLECULAR BIOSCIENCE
Volume 9, Issue 9, Pages 836-841Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/mabi.200900156
Keywords
ammonium salts; cellulose; ionic liquids; NMR; synthesis
Funding
- Fachagentur Nachwachsende Rohstoffe e.V. [22021905]
- Deutsche Bundesstiftung Umwelt [24762-31]
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New ammonium-based cellulose solvents with triethylmethylammonium- and tributylmethylammonium cations and carboxylate anions were synthesized and investigated as potential solvents for cellulose. Triethylmethylammonium formate was found to dissolve cellulose. Small amounts of formic acid may be used to adjust the melting point of the organic salt and can increase the dissolution velocity of cellulose. Carboxymethylation as a common etherification reaction was investigated in the new ammonium-based system. The waters-oluble carboxymethyl cellulose obtained, had a degree of substitution as high as 1.55. An unconventional pattern of substitution was accessible.
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