Cellulose aerogel beads and monoliths from CO2-based reversible ionic liquid solution.
In: International Journal of Biological Macromolecules, Jg. 271 (2024-06-20), S. N.PAG
academicJournal
Zugriff:
The CO 2 -based reversible ionic liquid solution of 1,1,3,3-tetramethylguanidine (TMG) and ethylene glycol (EG) in dimethyl sulfoxide (DMSO) after capturing CO 2 , (2[TMGH]+[O 2 COCH 2 CH 2 OCO 2 ]2−/DMSO (χ RILs = 0.1), provides a sustainable and effective platform for cellulose dissolution and homogeneous utilization. Highly porous cellulose aerogel beads and monoliths were successfully prepared via a sol-gel process by extruding cellulose solution into different coagulation baths (NaOH aqueous solution or alcohols) and exposing the cellulose solution in open environment, respectively, and followed by different drying techniques, including supercritical CO 2 -drying, freeze-drying and air-drying. The effect of the coagulation baths and drying protocols on the multi-scale structure of the as-prepared cellulose aerogel beads and monoliths were studied in detail, and the sol-gel transition mechanism was also studied by the solvatochromic parameters determination. High specific surface area of 252 and 207 m2/g for aerogel beads and monoliths were achieved, respectively. The potential of cellulose aerogels in dye adsorption was demonstrated. A viable and sustainable methodology for production of pure cellulose aerogel beads and monoliths with satisfactory porosities and specific surface area were developed from the newly developed CO 2 -based reversible ILs solvent system. [Display omitted] • First study of cellulose aerogel beads and monoliths from the CO 2 -based reversible ionic liquid/DMSO system • Multi-scale structure of the cellulose aerogel beads and monoliths were studied. • Solvatochromic parameters α and β play a key role in the sol-gel process. • Congo red adsorption behavior follows a pseudo-second-order rate model and the Langmuir isotherm. [ABSTRACT FROM AUTHOR]
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Cellulose aerogel beads and monoliths from CO2-based reversible ionic liquid solution.
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Autor/in / Beteiligte Person: | Yang, Tongjun ; Xu, Junpeng ; Sheng, Hailiang ; Wang, Junqin ; Hu, Gang ; Liang, Songmiao ; Hu, Lijie ; Zhang, Lihua ; Xie, Haibo |
Zeitschrift: | International Journal of Biological Macromolecules, Jg. 271 (2024-06-20), S. N.PAG |
Veröffentlichung: | 2024 |
Medientyp: | academicJournal |
ISSN: | 0141-8130 (print) |
DOI: | 10.1016/j.ijbiomac.2024.132718 |
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