Table 2.
Characterization of PEG-fibrinogen (PF) hydrogelsa.
| Gel type | % PEG-DA | G′ (Pa) | Gel point (s)b | Time required to reach G′ plateau (s) |
|---|---|---|---|---|
| PF-0 | 0 | 140.1 ± 1.8 | 11.4 ± 0.2 | 38.2 ± 0.2 |
| PF-0.5 | 0.5 | 453.8 ± 12.6 | 11.5 ± 0.1 | 51.7 ± 0.1 |
| PF-1.5 | 1.5 | 1574 ± 21.2 | 17.4 ± 2.6 | 82.6 ± 0.1 |
| PF-2.5 | 2.5 | 3601 ± 46.5 | 23.4 ± 2.5 | 127.4 ± 4.5 |
aMeasurements were taken at room temperature in the time-sweep oscillatory mode with a sinusoidal 2% strain rate and a 6 rad s−1 angular frequency (Mean ± SD; n = 3).
bGel point is defined as the time at which the crossover of storage modulus (G′) and loss modulus (G′′) occurred. Herein, it is used as an indicator of the rate of gelation.