| Hydrogel type | Transmittance (%) | Swelling (%) | Na+ ion permeability [Pion 10-6(mm2/min)] |
|---|---|---|---|
| Blank sheet | 98.3 ± 0.05 | 78.50 ± 0.99 | 6.38 ± 0.19 |
| DL-50 | 98.1 ± 0.10 | 77.61 ± 1.10 | 5.75 ± 0.25 |
| DL-100 | 97.6 ± 0.08 | 76.49 ± 1.39 | 5.14 ± 0.37 |
| DL-150 | 97.3 ± 0.09 | 75.22 ± 1.47 | 4.67 ± 0.26 |
| EC-50% | 86.9 ± 0.25 | 76.30 ± 0.84 | 4.16 ± 0.61 |
| EC-70% | 78.8 ± 0.55 | 70.72 ± 0.78 | 3.76 ± 0.35 |
| EC-85% | 62.4 ± 0.70 | 62.82 ± 0.84 | 2.06 ± 0.57 |