Journal
BULLETIN OF THE KOREAN CHEMICAL SOCIETY
Volume 34, Issue 12, Pages 3771-3776Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.5012/bkcs.2013.34.12.3771
Keywords
Cellulose; Dissolution; Ionic liquid; Lithium chloride; Dihedral angle
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Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF)
- Ministry of Science, ICT & Future Planning [2011-0013429]
- Fundamental R&D Program for Core Technology of Materials of the Ministry of Trade, Industry and Energy, Republic of Korea
- National Research Foundation of Korea [2011-0013429] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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..
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