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Pore size of AAO tubular membranes produced by 3 wt %, 5 wt %, 7 wt %, 10 wt % and 20 wt % sulfuric acid at 12.5, 15 and 20 V at 0°C
| Concentration of sulfuric acid (wt %) | Pore Size (nm) | ||
|---|---|---|---|
| Voltage (V) | |||
| 12.5 | 15 | 20 | |
| 3 | 19.9±1.9 | 21.6±1.8 | 24±2.5 |
| 5 | 19.1±1.9 | 21.4±0.8 | |
| 7 | 19±0.5 | ||
| 10 | 18.4±5.6 | ||
| 20 | 13.7±7.8 | ||
