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Influence of water on the dissolution of cellulose in selected ionic liquids

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Abstract

Cellulose (7% water) was thoroughly dispersed in various ionic liquids (IL) and the turbidity of the mixture was investigated to distinguish real dissolution from fine dispersion. The dissolving ability of 1-butyl-3-methylimidazolium chloride (BMIMCl know cellulose solvent) and 11 other commercial IL (not reported as cellulose solvents) was studied. From the latter, only 1,3-dimethylimidazolium dimethylphosphate (DMIMDMP) could dissolve cellulose. The influence of water content on the real dissolution of cellulose in these two IL was investigated. The maximum theoretical amount of dissolved anhydrous cellulose in the IL was determined by extrapolation methodology at different temperatures. For cellulose in BMIMCl, it was 8.75 g/100 g of IL at 95 °C. DMIMDMP could achieve real cellulose dissolution only in a practically anhydrous system (2.3 g/100 g of IL at 30 °C) but dissolution was physically limited by high viscosity.

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Acknowledgments

The authors wish to thank TEMBEC France and the ANRT agency (France) for financial support.

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Correspondence to Mathieu Mazza.

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Mazza, M., Catana, DA., Vaca-Garcia, C. et al. Influence of water on the dissolution of cellulose in selected ionic liquids. Cellulose 16, 207–215 (2009). https://doi.org/10.1007/s10570-008-9257-x

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  • DOI: https://doi.org/10.1007/s10570-008-9257-x

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