Electrospinning of cellulose nanofibers from ionic liquids: The effect of different cosolvents
Journal article, 2012
Cellulose was electrospun with various concentrations of ionic liquid and cosolvent. Three different cosolvents were used in this study; dimethylacetamide (DMAc), dimethyl formamide (DMF), and dimethyl sulfoxide (DMSO). The cosolvents were added to modify the viscosity, electrical conductivity, and surface tension of the solutions. The solubility of cellulose in ionic liquids is highly affected by changes in solvent properties on the molecular level in the binary solvent systems. The difference in molecular structure of the cosolvents and the interactions between cosolvent and ionic liquid can explain the difference in dissolution power of the cosolvents. Scanning electron microscope (SEM) was used to characterize electrospun cellulose fibers. For the systems tested the importance of having a rather high viscosity and high surface tension, and some degree of shear thinning to produce fibers is shown.
parameters
solvation
electrospinning
solvent
biopolymer
cellulose
temperature
ionic liquid
transport-properties
dissolution
rheological properties
nanofibers
polymer
fibers
dissolution
Author
Linda Härdelin
Chalmers, Chemical and Biological Engineering, Polymer Technology
Johannes Thunberg
Chalmers, Chemical and Biological Engineering
Erik Per Perzon
Swerea
Gunnar Westman
Chalmers, Chemical and Biological Engineering, Organic Chemistry
Wallenberg Wood Science Center (WWSC)
Pernilla Walkenström
Swerea
Paul Gatenholm
Chalmers, Chemical and Biological Engineering, Polymer Technology
Wallenberg Wood Science Center (WWSC)
Journal of Applied Polymer Science
0021-8995 (ISSN) 1097-4628 (eISSN)
Vol. 125 3 1901-1909Subject Categories
Chemical Sciences
DOI
10.1002/app.36323