Figure 9.

Water contact angle (WCA) measured values of both sides of the films before (except CTR50 and BG50) and after cross-linking with genipin, being the “upper surface” HA/HAcat and the “bottom surface” CHI/CHIcat in all film formulations. Significant differences were stated for p < 0.05 (*), p < 0.01 (**), p < 0.001 (***), and p < 0.0001 (****). Straight line represents the significant differences between equivalent surfaces and in dotted lines those between opposite surfaces (i.e., upper-bottom).