Table 1.
Surface density, degree of cross-link, and water contact angle of silk sericin/PVA films cross-linked with genipin at different concentrations (0, 0.01, 0.025, 0.05, 0.075, and 0.1% w/v).
| Genipin concentration (% w/v) | Surface density (mg/mm3) | Degree of cross-link (%) | Contact angle (°) |
|---|---|---|---|
| 0 | 1.28 ± 0.04 | — | 54.91 ± 4.29 |
| 0.010 | 1.33 ± 0.06* | 13.84 ± 2.59 | 54.71 ± 9.74 |
| 0.025 | 1.33 ± 0.03* | 18.82 ± 4.00 | 52.06 ± 7.66 |
| 0.050 | 1.36 ± 0.09* | 22.64 ± 1.89† | 53.85 ± 3.29 |
| 0.075 | 1.35 ± 0.07* | 29.75 ± 6.46† | 52.63 ± 3.57 |
| 0.100 | 1.35 ± 0.10* | 38.97 ± 4.51† | 54.04 ± 10.10 |
*P < 0.05, significant against the value of non-cross-linked film.
† P < 0.05, significant against the value of films cross-linked with 0.01% w/v.