Lutidinium-based ionic liquids for efficient dissolution of cellulose

Rakesh Samikannu, Shashi Kant Shukla, Ajaikumar Samikannu, Jyri-Pekka Mikkola

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    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.

    Original languageUndefined/Unknown
    Pages (from-to)2299–2306
    JournalNew Journal of Chemistry
    Volume43
    Issue number5
    DOIs
    Publication statusPublished - 2019
    MoE publication typeA1 Journal article-refereed

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