Table 1. Swelling Degrees of Porous and Freeze–Thawed Sacran Hydrogelsa.
| cross-linking temperaturesb (°C) | porous hydrogels (g/g) | freeze–thawed hydrogels (g/g) |
|---|---|---|
| 60 | 186 ± 16 (40 ± 3) | 77 ± 3 |
| 80 | 95 ± 6 (38 ± 3) | 43 ± 2 |
| 100 | 32 ± 3 (15 ± 1) | 23 ± 3 |
| 120 | 16 ± 2 (9 ± 1) | 12 ± 1 |
| 140 | 9 ± 0.2 (6 ± 0.1) | 9 ± 2 |
a
Swelling degrees (Q) in distilled water were estimated at room temperature. Values in parentheses refer to matrix-swelling degrees estimated by subtracting pore volumes from entire swelling.
b
Thermal-cross-linking temperatures of layered film as precursors of layered hydrogels.