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Polymers 2017, 9(10), 526; https://doi.org/10.3390/polym9100526

Facile Cellulose Dissolution and Characterization in the Newly Synthesized 1,3-Diallyl-2-ethylimidazolium Acetate Ionic Liquid

1
College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, China
2
Nanocellulose and Biocomposites Research Centre, College of Engineering, Design and Physical Sciences, Brunel University London, Middlesex UB8 3PH, UK
*
Authors to whom correspondence should be addressed.
Received: 20 September 2017 / Revised: 9 October 2017 / Accepted: 13 October 2017 / Published: 18 October 2017
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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. View Full-Text
Keywords: 1,3-diallyl-2-ethylimidazolium acetate; ionic liquid; co-solvent system; solubility of cellulose; electrospinning 1,3-diallyl-2-ethylimidazolium acetate; ionic liquid; co-solvent system; solubility of cellulose; electrospinning
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Zhang, H.; Xu, Y.; Li, Y.; Lu, Z.; Cao, S.; Fan, M.; Huang, L.; Chen, L. Facile Cellulose Dissolution and Characterization in the Newly Synthesized 1,3-Diallyl-2-ethylimidazolium Acetate Ionic Liquid. Polymers 2017, 9, 526.

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