Figure 2.

Characterization of G3K/OHA hydrogels. a) SEM and b) CLSM analysis of the hydrogel structure. G’ and G’’ of G3K/OHA hydrogels on c) frequency and d) strain sweeps. e) Change of steady shear viscosity as a function of shear rate for the hydrogel. The inset picture showed the shear‐thinning and injectability features of the hydrogel. f) Continuous step‐strain measurements were applied to the hydrogel in the step of 1% and 1000% oscillatory strain for cycles. g) Self‐healing process of G3K/OHA hydrogel with flower shapes. h) Blue and yellow stained cylinder‐shaped hydrogel were cut into three 5 mm length strips and recombined color by color. The joint position of two gels was observed under microscopy.