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.

提出使用低亨利常数的有机溶剂，如碳酸丙烯酯（PC）和环丁砜作为CO ₂吸收剂，以提高CO _{2可转换溶剂对CO 2}的吸收能力，从而有效增强纤维素的溶解。添加 PC 后，纸纤维素的最大溶解浓度可从 1.0 wt% 大幅提高至 5.0 wt%，而微晶纤维素和玉米芯纤维素的最大浓度分别从 5.0 提高至 10.0 和 7.0 wt%。此外，再生纤维素的化学和晶体结构不受添加CO ₂吸收剂的影响。本研究说明了一种简单有效的方法来改变 CO₂可切换溶剂，这将有助于复杂溶剂体系在未来纤维素的增强溶解、衍生化和加工中的应用。