Journal
CARBOHYDRATE POLYMERS
Volume 113, Issue -, Pages 67-76Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2014.07.001
Keywords
Ionic liquid; Cellulose; Fibre dissolution; Differential scanning calorimetry
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Funding
- FIBIC
- Finnish Funding Agency for Innovation (TEKES)
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In this work, interactions between cellulose and ionic liquids were studied calorimetrically and by optical microscopy. Two novel ionic liquids (1,5-Diazabicyclo[4.3.0]non-5-enium propionate and N-methyl-1,5-diazabicyclo[4.3.0]non-5-enium dimethyl phosphate) and 1-ethyl-3-methylimidazolium acetate-water mixtures were used as solvents. Optical microscopy served in finding the extent of dissolution and identifying the dissolution pattern of the cellulose sample. Calorimetric studies identified a peak relating to dissolution of cellulose in solvent. The transition did, however, not indicate complete dissolution, but rather dissolution inside fibre or fibrils. This method was used to study differences between four cellulose samples with different pretreatment or origins. (C) 2014 Elsevier Ltd. All rights reserved.
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