Lutidinium-based ionic liquids for efficient dissolution of cellulose

A1 Journal article (refereed)


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Publication Details

List of Authors: Rakesh Samikannu, Shashi Kant Shukla, Ajaikumar Samikannu, Jyri-Pekka Mikkola
Publication year: 2019
Journal: New Journal of Chemistry
Journal acronym: New J. Chem.
Volume number: 43
Issue number: 5
Start page: 2299
End page: 2306
eISSN: 1369-9261


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.


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