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Lookup NU author(s): Professor David XieORCiD
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).
The dissolution behavior of cellulose in the mixtures of dimethyl sulfoxide (DMSO) and different ionic liquids (ILs) at 25 °C was studied. High solubility of cellulose was reached in the mixtures of ILs and DMSO at mole fractions of 1:2, 1:2, and 1:1 for 1-butyl-3-methylimidazolium acetate, 1-propyl-3-methylimidazolium acetate, and 1-ethyl-3-methylimidazolium acetate, respectively. At high DMSO/IL molar ratios (10:1–2:1), a longer alkyl chain of the IL cation led to higher cellulose solubility. However, shorter cation alkyl chains favored cellulose dissolution at 1:1. Rheological, Fourier transform infrared spectroscopy (FTIR), and nuclear magnetic resonance (NMR) measurements were used to understand cellulose dissolution. It was found out that the increase of the DMSO ratio in binary mixtures caused higher cellulose solubility by decreasing the viscosity of systems. For cations with longer alkyl chains, stronger interaction between the IL and cellulose and higher viscosity of DMSO/IL mixtures were observed. The new knowledge obtained here could be useful to the development of cost-effective solvent systems for biopolymers.
Author(s): Ren F, Wang J, Yu J, Zhong C, Xie F, Wang S
Publication type: Article
Publication status: Published
Journal: ACS Omega
Year: 2021
Volume: 6
Issue: 41
Pages: 27225–27232
Print publication date: 19/10/2021
Online publication date: 07/10/2021
Acceptance date: 29/09/2021
Date deposited: 23/05/2023
ISSN (electronic): 2470-1343
Publisher: ACS Publications
URL: https://doi.org/10.1021/acsomega.1c03954
DOI: 10.1021/acsomega.1c03954
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