TY - JOUR
T1 - Dissolution of cotton cellulose in 1:1 mixtures of 1-butyl-3-methylimidazolium methylphosphonate and 1-alkylimidazole co-solvents
AU - Dissanayake, Niwanthi
AU - Thalangamaarachchige, Vidura D.
AU - Thakurathi, Mahesh
AU - Knight, Matthew
AU - Quitevis, Edward L.
AU - Abidi, Noureddine
N1 - Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/10/1
Y1 - 2019/10/1
N2 - 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.
AB - 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.
KW - Cellulose
KW - Co-solvent
KW - Conductivity
KW - Ionic liquids
KW - Viscosity
UR - http://www.scopus.com/inward/record.url?scp=85066463561&partnerID=8YFLogxK
U2 - 10.1016/j.carbpol.2019.05.071
DO - 10.1016/j.carbpol.2019.05.071
M3 - Article
C2 - 31227168
AN - SCOPUS:85066463561
SN - 0144-8617
VL - 221
SP - 63
EP - 72
JO - Carbohydrate Polymers
JF - Carbohydrate Polymers
ER -