Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 27225-27232 |
| Number of pages | 8 |
| Journal | ACS OMEGA |
| Volume | 6 |
| Issue number | 41 |
| DOIs | |
| Publication status | Published - 19 Oct 2021 |
Bibliographical note
Publisher Copyright:© 2021 The Authors. Published by American Chemical Society.
Funding
The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (32030084 and 31871796) and the Natural Science Foundation of Tianjin Municipal Science and Technology Commission (20ZYJDJC00040 and 17JCJQJC45600).
| Funders | Funder number |
|---|---|
| National Natural Science Foundation of China | 31871796, 32030084 |
| Natural Science Foundation of Tianjin Municipal Science and Technology Commission | 20ZYJDJC00040, 17JCJQJC45600 |
ASJC Scopus subject areas
- General Chemistry
- General Chemical Engineering