Fig. 1.

Synthesis, and chemical characterization of GELGYM. a) Schematic of chemical synthesis of GELGYM via epoxide ring-opening reaction of glycidyl methacrylate with gelatin and its crosslinking with a visible LED in the presence of E (0.05 mM), TEA 0.04%, and VC (0.04%) to form a 3-dimensional network of the hydrogel. b) ¹H-NMR characterization of the GELGYM before and after crosslinking. c) FD tunability of GELGYM through varying the concentration of glycidyl methacrylate in the reaction, and d) crosslinking progress dependence on the crosslinking time (CT), characterized by ¹H-NMR.