Table 2.
Water uptake (WU), ion exchange capacity (IEC), and fixed charge density (CDfix) results of the prepared AEMs.
| Membrane Type | WU (%) |
IEC1 (mmol/g) |
IEC2 (mmol/g) |
CDfix1 (mmol/g) |
CDfix2 (mmol/g) |
|---|---|---|---|---|---|
| (1) Unmodified | 59.0 ± 1.8 | 0.949 ± 0.18 | 1.369 ± 0.05 | 1.605 ± 0.25 | 2.321 ± 0.08 |
| (2) One side 1 g/L PAA | 67.4 ± 6.0 | 0.681 ± 0.03 | 1.625 ± 0.05 | 1.017 ± 0.14 | 2.413 ± 0.08 |
| (3) One side 3 g/L PAA | 62.7 ± 3.8 | 0.433 ± 0.01 | 1.751 ± 0.05 | 0.692 ± 0.05 | 2.793 ± 0.08 |
| (4) Both sides 3 g/L PAA | 61.5 ± 0.9 | 0.378 ± 0.01 | 1.751 ± 0.05 | 0.614 ± 0.02 | 2.847 ± 0.08 |
| (5) One side 5 g/L PAA | 63.3 ± 5.0 | 0.352 ± 0.02 | 1.760 ± 0.05 | 0.560 ± 0.08 | 2.779 ± 0.08 |
1 Titration method; 2 Spectrophotometric method.