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Title: Facile cellulose dissolution and characterization in the newly synthesized 1,3-diallyl-2-ethylimidazolium acetate ionic liquid
Authors: Zhang, H
Xu, Y
Li, Y
Lu, Z
Cao, S
Fan, M
Huang, L
Chen, L
Keywords: 1,3-diallyl-2-ethylimidazolium acetate;Ionic liquid;Co-solvent system;Solubility of cellulose;Electrospinning
Issue Date: 18-Oct-2017
Publisher: MDPI
Citation: Polymers, 2017, 9 (10), pp. 1 - 12
Abstract: A facile cellulose solvent 1,3-diallyl-2-ethylimidazolium acetate ([AAeim][OAc]) with high electrical conductivity has been designed and synthesized for the first time, via a quaternization reaction and ion exchange method. The dissolution characteristics of cellulose in this solvent were studied in detail. Meanwhile, the co-solvent system was designed by adding an aprotic polar solvent dimethyl sulfoxide (DMSO) in [AAeim][OAc]. The effects of temperature and the mass ratio of DMSO to [AAeim][OAc] on the solubility of cellulose were studied. Furthermore, the effects of regeneration on the molecular structure and thermal stability of cellulose were determined by Fourier transform infrared spectroscopy (FT-IR), thermal gravity analysis (TGA) and X-ray diffraction (XRD). The findings revealed that the synthesized ionic liquid (IL) has a relatively low viscosity, high conductivity and a good dissolving capacity for bamboo dissolving pulp cellulose (Degree of Polymerization: DP = 650). The macromolecular chain of the cellulose is less damaged during the dissolution and regeneration process. Due to the increased number of “free” anions [OAc]− and cations [AAeim]+, the addition of DMSO can significantly increase the solubility of the cellulose up to 12 wt % at the mass ratio of 3:1, indicating that the synthesized IL has a potential application in the electrospinning field.
ISSN: 2073-4360
Appears in Collections:Dept of Mechanical and Aerospace Engineering Research Papers

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