Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 8, Issue 50, Pages 18446-18454Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.0c05788
Keywords
cellulose; solvents; solubility; possible mechanism; cotton
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Funding
- Zhejiang Provincial Natural Science key Foundation of China [LZ20E030003]
- Fundamental Research Funds of Zhejiang Sci-Tech University [2019Q001]
- Young Elite Scientists Sponsorship Program by CAST [2018QNRC001]
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Cellulose dissolution is a worldwide issue in the production industry. Especially, the development of highly efficient and green cellulose solvents has been considered as a key factor to restrict the broad application of different cellulose industries. In this study, different chloride salts, such as LiCl, ZnCl2, CaCl2, and FeCl3, with different water amounts were used as green solvents to investigate the driving force of cellulose dissolution. The superfast and highly efficient cellulose dissolution in ZnCl2 center dot 3H(2)O and FeCl3 center dot 6H(2)O was successfully achieved within 5-20 min, which was confirmed by the results of polarized light microscopy. Moreover, the effect of pH and water amounts of the chloride salts on the cellulose structural change and dissolution ability was investigated for a better understanding of the role of chloride salts during the cellulose dissolution process. Especially, the dissolution mechanism of cellulose in ZnCl2 center dot 3H(2)O and FeCl3 center dot 6H(2)O has been provided compared to other non-derivatizing cellulose solvents.
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