Dissolution of cotton cellulose in 1:1 mixtures of 1-butyl-3-methylimidazolium methylphosphonate and 1-alkylimidazole co-solvents

Niwanthi Dissanayake, Vidura D. Thalangamaarachchige, Mahesh Thakurathi, Matthew Knight, Edward L. Quitevis, Noureddine Abidi

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

During the past decade, ionic liquids (ILs) have attracted increasing attention as efficient, novel solvents for dissolving cellulose. In this study, 1-butyl-3-methylimdazolium methylphosphonate ([C4C1im][(OMe)(H) PO2]) was used in the dissolution of cotton cellulose and the role of 1-methylimidazole, 1-ethylimidazole, 1-propylimidazole, and 1-butylimidazole as co-solvents was investigated. The progress of the dissolution was monitored using polarized light microscopy (PLM) and the regenerated cellulose was characterized using scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy. The effect of 1-alkylimidazoles as co-solvents in cellulose dissolution was examined in terms of the basicity (hydrogen-bond acceptor capability), conductivity, viscosity, and ionicity of the IL and IL/co-solvent mixtures. These studies showed that the addition of 1-alkylimidazole co-solvents enhances cellulose dissolution by the IL and that the role of these co-solvents is mainly to increase mass transport by reducing the viscosity of the mixtures.

Original languageEnglish
Pages (from-to)63-72
Number of pages10
JournalCarbohydrate Polymers
Volume221
DOIs
StatePublished - Oct 1 2019

Keywords

  • Cellulose
  • Co-solvent
  • Conductivity
  • Ionic liquids
  • Viscosity

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