Figure 1. HAMA synthesis and characterization.

(A) Schematic illustration of methods of HAMA and HA-Cat synthesis. (i-iii) Schematic process of fabrication and synthesis of (i) HAMA, (ii) HAMA@HA-Cat, and (iii) hydrogels. (iv) Schematic illustration of the process of Fe³⁺ curing HA-Cat hydrogels. (B) Quantification of the compression modulus, and (C) tanδ of the hydrogels by compression and rheological test. (n > 3 measurements per gel). (D) Stress relaxation test was applied to the 4 selected HAMA hydrogels and regression was performed by a modified Maxwell model to get stress relaxation time.