Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7790828 | Carbohydrate Polymers | 2014 | 10 Pages |
Abstract
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.
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Authors
Helena Parviainen, Arno Parviainen, Tommi Virtanen, Ilkka Kilpeläinen, Patrik Ahvenainen, Ritva Serimaa, Stina Grönqvist, Thaddeus Maloney, Sirkka Liisa Maunu,