Table 3.
Parameters describing the photo-induced chemical cross-linking of gelatin derivative solutions with the classical method at 37 °C or with the sequential cross-linking method: initial increases kg,c and kDBC of storage modulus G′ and double bond conversion DBC, respectively, chemical gelation delay time td,c upon UV irradiation, final G′, and final DBC.
| Chemical Cross-Linking | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Classical method (measured at 37 °C) | Sequential cross-linking (measured at 4 °C) | |||||||||
| kg,c (Pa s−1) | kDBC (% s−1) | kDBC (µmol g−1 s−1) | G′ (kPa) | DBC (%) | kg,c (Pa s−1) | kDBC (% s−1) | kDBC (µmol g−1 s−1) | G′ (kPa) | DBC (%) | |
| GM2 | 273 ± 14 | 1.9 ± 0.4 | 5.4 ± 1.1 | 36.0 ± 1.9 | 86.2 ± 1.2 | 926 ± 28 | 0.7 ± 0.1 | 1.9 ± 0.3 | 180.9 ± 3.3 | 58.1 ± 2.1 |
| GM2A8 | 15 ± 1 | 1.7 ± 0.2 | 5.9 ± 0.8 | 2.3 ± 0.2 | 75.6 ± 1.2 | 173 ± 9 | 1.0 ± 0.3 | 3.5 ± 1.0 | 35.6 ± 1.9 | 62.1 ± 6.3 |
| GM10 | 887 ± 24 | 5.4 ± 0.1 | 51.2 ± 1.3 | 55.6 ± 4.4 | 93.1 ± 0.1 | 1770 ± 236 | 2.2 ± 0.1 | 20.7 ± 0.8 | 165.1 ± 15.0 | 80.8 ± 0.8 |
The data given in % are relative to the degree of methacryloylation (DM) of the respective gelatin derivative.