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Updated: Jun 29, 2025
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Pretreatment of Lignocellulosic Biomass with Low-cost Ionic Liquids
Published on: August 10, 2016
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Dissolution of cellulose in imidazolium-based double salt ionic liquids
M Mahbubur Rahman1, M Sarwar Jahan2, Md Mominul Islam3
1Bangladesh Council of Scientific and Industrial Research, Dr. Qudrat-i-Khuda Road, Dhaka 1205, Bangladesh; Department of Chemistry, University of Dhaka, Dhaka 1000, Bangladesh.
International Journal of Biological Macromolecules
|April 4, 2024
Summary
Double salt ionic liquids (DSILs) show enhanced cellulose solubility compared to individual ionic liquids (ILs). These DSILs offer a recyclable and efficient method for cellulose processing and regeneration.
Area of Science:
- Materials Science
- Green Chemistry
- Polymer Chemistry
Background:
- Cellulose dissolution is crucial for its processing into various materials.
- Traditional solvents often pose environmental concerns.
- Ionic liquids (ILs) have emerged as promising alternatives for cellulose dissolution.
Purpose of the Study:
- To investigate the dissolution of cellulose in double salt ionic liquids (DSILs).
- To compare the efficacy of DSILs with individual ILs for cellulose solubility.
- To explore the potential of DSILs as a sustainable method for cellulose processing.
Main Methods:
- Synthesis of DSILs ([C4mim](CH3CO2)xCl1-x) with varying mole fractions.
- Evaluation of cellulose solubility using commercial cellulose (CC) powder, kraft pulp (KP), and prehydrolysis kraft pulp (PHKP).
- Regeneration of cellulose using water as an anti-solvent and analysis of regenerated materials.
Main Results:
- DSILs exhibited significantly enhanced cellulose solubility compared to individual ILs.
- Maximum solubility of CC powder reached 32.8 wt% in [C4mim](CH3CO2)0.6Cl0.4 at 100 °C.
- DSILs demonstrated excellent recyclability (>99%) with no structural degradation.
Conclusions:
- DSILs are superior solvents for cellulose compared to conventional ILs.
- The developed DSIL system offers a sustainable and efficient route for cellulose dissolution and regeneration.
- DSILs hold significant potential for industrial applications in cellulose-based material processing.
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