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 IVF AB

Gunnar Westman

Chalmers, Chemical and Biological Engineering, Organic Chemistry

Wallenberg Wood Science Center (WWSC)

Pernilla Walkenström

Swerea IVF AB

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 1901-1909

Subject Categories

Chemical Sciences

DOI

10.1002/app.36323

More information

Latest update

8/27/2018