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Enhanced dissolution of cellulose in CO2 switchable system by solvent with low Henry's constants as CO2 absorbent

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Abstract

Organic solvents with low Henry's constants, such as propylene carbonate (PC) and sulfolane, were proposed to be used as CO2 absorbents to increase CO2 absorption capacity in the CO2 switchable solvent, so that the dissolution of cellulose can be effectively enhanced. With the addition of PC, the maximum concentration achieved for the dissolution of paper cellulose can be largely increased from 1.0 to 5.0 wt%, while those for microcrystalline cellulose and corncob cellulose were increased from 5.0 to 10.0 and 7.0 wt%, respectively. Moreover, the chemical and crystalline structure of the regenerated cellulose was not affected by the addition of CO2 absorbents. This study illustrated a simple and effective way to modify the CO2 switchable solvent, which would be helpful for the application of the complex solvent system for the enhanced dissolution, derivatization, and processing of cellulose in the future.

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Acknowledgments

We are grateful for the financial support by Ningbo Natural Science Foundation (2021J196), Key Research and Development Program of Shandong Province (2019JZZY020217), and the National Natural Science Foundation of China (21978310). We also gratefully acknowledge Prof. Xinghong Zhang for his help with the solid state 13C CP/MAS NMR.

Funding

Ningbo Natural Science Foundation (2021J196), Key Research and Development Program of Shandong Province (2019JZZY020217), and the National Natural Science Foundation of China (21978310).

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JZ carried out the majority parts of experiments, analysis of experimental results, and writing of manuscript. SM carried out part of experiments and analysis of experimental results. FL guided the analysis of experimental data and the writing of this manuscript. QQ gave constructive discussion during experiment and manuscript preparation. HN helped performing the analysis of partially experimental data. JZ guided the general conception of this study.

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Correspondence to Fei Liu, Qian Qiao or Haining Na.

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Zhang, J., Mi, S., Liu, F. et al. Enhanced dissolution of cellulose in CO2 switchable system by solvent with low Henry's constants as CO2 absorbent. Cellulose 29, 6745–6758 (2022). https://doi.org/10.1007/s10570-022-04670-y

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  • DOI: https://doi.org/10.1007/s10570-022-04670-y

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