Research Article
Controlled Morphology and Mechanical Characterisation of Electrospun Cellulose Acetate Fibre Webs
Table 1
Experimental conditions: combinations of solvent systems, polymer concentration, and spinning solution flow rate and voltage.
| | Solvent | Ratio
(v/v) | Polymer
concentration % (w/v) | Flow rate
(mL min−1) | Voltage
(kV) | As-spun fibres |
| | Acetone | — | 15 | 0.02 | 20–25 | Few ribbon-like fibres | | DMAc | — | 15 | 0.02 | 20–25 | Only beads | | Acetic acid | — | 15 | 0.02 | 20–25 | No production | | Chloroform | — | 15 | 0.02 | 20–25 | Only beads | | Methanol | — | 15 | 0.02 | 20–25 | Only beads | | Acetone : water | 17 : 3 | 15 | 0.02 | 20–25 | No production | | Acetone : water | 4 : 1 | 10 | — | — | Precipitation | | Acetic acid : water | 3 : 1 | 15 | 0.004 | 20–25 | Large beads | | Acetic acid : acetone | 3 : 1 | 15 | 0.004 | 20–25 | Few fibres and large beads | | Acetic acid : DMAc | 3 : 1 | 15 | 0.004 | 20–25 | Large beads | | DMAc : acetone | 2 : 1 | 15 | 0. 004 | 20–25 | Large beads | | Methanol : water | 4 : 1 | 10 | — | — | Precipitation | | Methanol : acetone | 3 : 2 and 4 : 1 | 10 | — | — | Precipitation | | Acetone : methanol | 3 : 2 and 4 : 1 | 15 | 0.004 | 20–25 | Fibres and small beads | | Chloroform : methanol | 4 : 1 | 15 | 0.004 | 20–25 | Some ribbon-like fibres | | Acetone : DMAc | 2 : 1 | 15 | 0.004 | 20–25 | Fibres and small beads | | | | 20 | 0.004 | 20–25 | Fibres and small beads | | | | 25 | 0.002 | 20–25 | Fibres free of beads |
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