Figure 4. Rheological properties and stability of both gelatin (Gel) and
Gelatin NPs composite (Gel-PDA-PAR30) hydrogels. A)
Shear viscosity as a function of shear rate for both Gel and
Gel-PDA-PAR30. B) Storage modulus (G’) as a function of
frequency for both conditions tested (Gel vs
Gel-PDA-PAR30). Stability of the different hydrogels
tested (Gel vs Gel-PDA-PAR30) at 37°C in a relevant
biological medium, C) enzymatic stability in collagenase; D) in acidic
condition (pH=5) and in E) physiological pH (pH=7.4). The results are
expressed as a percentage of remaining mass at different time points
(n=3 error bars correspond to standard deviations).