Abstract
1-Alkyl-3-methylimidazolium chloride-LiCl melts were prepared from the reaction of 1-alkyl-3-methylimidazolium chloride ([RMIm]Cl; R=allyl or n-butyl) and lithium chloride, and their ability to dissolve cellulose was evaluated. The solubility of cellulose was greatly increased to 320% when [RMIm]Cl was replaced by [RMIm][LiCl2]. Dissolved cellulose in LiCl/[RMIm]Cl melts was successfully regenerated by adding water and LiCl/[RMIm]Cl melts were easily recovered by removing water. As supported by the computational results, the higher solubility of cellulose in [RMIm][LiCl2] can be ascribed to the increased bond distance between anion and C(2)-H of the imidazolium ring compared with that in [RMIm]Cl, thereby resulting in the increased interaction between [LiCl2]- and the hydroxyl groups of cellulose.
Original language | English |
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Pages (from-to) | 3771-3776 |
Number of pages | 6 |
Journal | Bulletin of the Korean Chemical Society |
Volume | 34 |
Issue number | 12 |
DOIs | |
Publication status | Published - 2013 Dec 20 |
Keywords
- Cellulose
- Dihedral angle
- Dissolution
- Ionic liquid
- Lithium chloride
ASJC Scopus subject areas
- Chemistry(all)