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Influence of cellulose on ion diffusivity in 1-ethyl-3-methyl-imidazolium acetate cellulose solutions

Lovell, Christopher S.; Walker, Adam; Damion, Robin A.; Radhi, Asanah; Tanner, Steven F.; Budtova, Tatiana; Ries, Michael E.


Christopher S. Lovell

Adam Walker

Asanah Radhi

Steven F. Tanner

Tatiana Budtova

Michael E. Ries


Solutions of microcrystalline cellulose in 1-ethyl-3-methyl-imidazolium acetate have been investigated using pulsedfield gradient 1H NMR. In all cases the geometrically larger cation was found to diffuse faster than the smaller anion. Arrhenius temperature analysis has been applied to the ion diffusivities giving activation energies. The diffusion and published viscosity data for these solutions were shown to follow the Stokes-Einstein relationship, giving hydrodynamic radii of 1.6 Å (cation) and 1.8 Å (anion). Theories for obstruction, free-volume and hydrodynamic effects on solvent diffusion have been applied. The Mackie-Meares and Maxwell-Fricke obstruction models provided a correct trend only when assuming a certain fraction of ions are bound to the polymer. From this fraction it was shown that the maximum dissolvable cellulose concentration is ̃27% w/w, which is consistent with the highest known prepared concentration of cellulose in this ionic liquid. The Phillies' hydrodynamic model is found to give the best description for the cellulose concentration dependence of the ion diffusivities. © 2010 American Chemical Society.


Lovell, C. S., Walker, A., Damion, R. A., Radhi, A., Tanner, S. F., Budtova, T., & Ries, M. E. (2010). Influence of cellulose on ion diffusivity in 1-ethyl-3-methyl-imidazolium acetate cellulose solutions. Biomacromolecules, 11(11), 2927-2935.

Journal Article Type Article
Acceptance Date Sep 15, 2010
Online Publication Date Oct 5, 2010
Publication Date Nov 8, 2010
Deposit Date Dec 5, 2022
Journal Biomacromolecules
Print ISSN 1525-7797
Electronic ISSN 1526-4602
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 11
Issue 11
Pages 2927-2935
Public URL
Publisher URL