Figure 4. The swelling behavior and degradation kinetics of the sericin hydrogels.
(a) The swelling dynamics of the sericin hydrogels in PBS with different pH (3, 7.4, 11) at 37°C. (b) The degradation kinetics of the sericin hydrogels immersed in PBS with different pH (3.0, 5.0, 7.4, 11.0). (c) The effects of degraded products from the sericin hydrogels on pH of PBS with the different starting pH.