Details

Autor(en) / Beteiligte

• Rahman, M. Mahbubur
• Jahan, M. Sarwar
• Islam, Md. Mominul
• Susan, Md. Abu Bin Hasan

Titel

Dissolution of cellulose in imidazolium-based double salt ionic liquids

Ist Teil von

• International journal of biological macromolecules, 2024-05, Vol.267 (Pt 1), p.131331-131331, Article 131331

Ort / Verlag

Netherlands: Elsevier B.V

Erscheinungsjahr

2024

Quelle

MEDLINE

Beschreibungen/Notizen

• The dissolution of cellulose in double salt ionic liquids (DSILs) was studied in detail and compared with the dissolution in individual constituent ionic liquids (ILs). The DSILs, [C4mim](CH3CO2)xCl1-x (x is the mole fraction of the single component ILs), were synthesized using acetate and chloride salts of 1-butyl-3-methylimidazolium. These DSILs were then used for the investigation of the solubility of cellulose in the whole mole fraction range. Commercial cellulose (CC) powder, kraft pulp (KP), and prehydrolysis kraft pulp (PHKP) of jute were chosen as cellulose sources. The solubility of cellulose increased with an increasing temperature for [C4mim](CH3CO2)0.6Cl0.4 and with increasing amount of [C4mim]Cl in DSILs. The maximum solubility of CC powder was 32.8 wt% in [C4mim](CH3CO2)0.6Cl0.4 at 100 °C, while for KP and PHKP, solubilities were 30.1 and 30.5 wt%, respectively under the identical condition. Cellulose could be regenerated from the DSILs using water as an antisolvent. Structure, morphology, and thermal stability of the regenerated cellulosic materials were analyzed. DSILs could be recycled >99 % without a discernible change in structure. This work demonstrates that DSILs display enhanced solubility over ILs system and have potential as a chemical processing methodology. [Display omitted] •The ability of double salts ionic liquids (DSILs) for dissolution of cellulose was studied.•A maximum solubility of 32.8 wt% of cellulose was achieved in DSILs.•Anions of DSILs exhibited synergistic effects to enhance dissolution of cellulose.•The regenerated cellulose exhibited lower crystallinity and thermal stability.•No discernable changes occur in the structure of DSIL after five consecutive recycle steps.