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7897230 
Journal Article 
Solvent control of cellulose acetate nanofibre felt structure produced by electrospinning 
Haas, D; Heinrich, S; Greil, P 
2010 
Yes 
Journal of Materials Science
ISSN: 0022-2461
EISSN: 1573-4803 
45 
5 
1299-1306 
English 
WOS:000273360400021 
Non-woven structures of cellulose acetate (CA) fibres of 90 nm-5 μm in diameter (spinning parameters 90 nm beaded fibres: 12% CA in EtOH-DMSO 1/1, 22 kV, 30 cm, 0.5 mL/h; maximum 5 μm diameter fused fibres spun with 14% CA in Ac-BenzOH 2/1, 22 kV, 24 cm, 13 mL/h) were produced by electrospinning. On the basis of Hansen solubility theory, composition of binary solvent mixtures (ketones-acetone, methyl ethyl ketone (MEK), and alcohols-benzyl alcohol, propylene glycol and dimethylsulphoxide) was optimized with respect to control of fibre felt morphology. Fibre networks of high packing density were obtained with binary low-volatile alcohols/MEK solvent mixtures, a decreased spinning distance and an increased feed rate. Substituting MEK by acetone in the solvent mixture resulted in the formation of nanofibre felt with a low degree of fibre cross-links. Thus, solvent control is a key aspect for control of electrospun fibre felt structures, which may serve as scaffolds for tissue engineering. © 2009 Springer Science+Business Media, LLC.