Issue 5, 2019

Lutidinium-based ionic liquids for efficient dissolution of cellulose

Abstract

Herein, we have studied the potential of lutidinium-based ILs (1-allyl-3,5-dimethylpyridinium chloride [3,5-ADMPy]Cl and 1-allyl-3,4-dimethylpyridinium chloride [3,4-ADMPy]Cl) in the dissolution of cellulose, and their structures were confirmed by 1H and 13C NMR spectra, respectively. [3,5-ADMPy]Cl exhibited the highest capacity in cellulose dissolution. In fact, it dissolved 20 wt% of cellulose within 12 min and 26 wt% of cellulose in 35 min at 118 °C. The crystallinity and morphology of native and regenerated cellulose were characterised by X-ray diffraction (XRD), scanning electron microscopy (SEM) and CP/MAS 13C NMR spectroscopy. These techniques clearly suggest that the crystallinity of cellulose is reduced upon treatment in lutidinium-based ILs. The thermogravimetric analysis (TGA) showed that regenerated cellulose had thermal stability close to that of native cellulose.

Graphical abstract: Lutidinium-based ionic liquids for efficient dissolution of cellulose

Supplementary files

Article information

Article type
Paper
Submitted
14 Sep 2018
Accepted
27 Dec 2018
First published
28 Dec 2018

New J. Chem., 2019,43, 2299-2306

Lutidinium-based ionic liquids for efficient dissolution of cellulose

R. Samikannu, S. K. Shukla, A. Samikannu and J. Mikkola, New J. Chem., 2019, 43, 2299 DOI: 10.1039/C8NJ04698K

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