Genipin Cross-Linked Chitosan-Polyvinylpyrrolidone Hydrogels: Influence of Composition and Postsynthesis Treatment on pH Responsive Behaviour

Figure 5

Photograph of LHL hydrogels polymerised at 30, 40, and 50°C and stored in a fridge (5°C) without subsequent manipulation. Sample composition: 0.2 mL Cht solution, 0.5 mL PVP solution, and 0.004 mL Gen solution.