Table 2.
Three effective factors and their range were investigated to prepare capsules using each solution.
| Factors | Unit | Symbol | Levels | ||
|---|---|---|---|---|---|
| PMMA/EC concentration ratio | C | 1 | 2 | ||
| Voltage | kV | V | 18 | 22 | 26 |
| Flow rate | ml/h | I | 0.3 | 0.4 | 0.5 |
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