Assessment of gelation. Dynamic oscillatory time sweep was conducted at a frequency of 1 Hz and oscillation strain of 1 % with constant axial load of 100 mN using a 20 mm stainless steel parallel plate geometry at 25 and 37 °C. Approximately 500 µL of r2 hydrogel were extruded onto the rheometer plate immediately after mixing of the components. Drying of the hydrogel samples was minimized by using a rheometer solvent trap. Since the storage modulus could not reach plateau until 44 hours, a longer experiment was needed. However, sample drying turned out to be an issue even when the rheometer solvent trap was used for experiments longer than 44 hours.