Fig. 7.

(A) Illustration of the structure of cellulose from natural resources to the molecular level. (Figures are adapted with permission from Culica et al. ⁸² ) (B) (I) Molecular structure diagram of CNCs cross‐linked with the collagen network within the hydrogel. Strain amplitude dependence of G' (II) and G" (III) of hydrogels with different pore orientations at a constant frequency of 1 Hz (Figures are adapted with permission from Liu et al. ⁸⁴ ) (C) (I) Neutralized a‐CNC suspension and collagen solution were loaded in separate syringes and mixed rigorously with a joint connector. (II) The reaction of aldehyde groups on the a‐CNC surface with primary amine groups of collagen yields imine cross‐links. (Figures are adapted with permission from Zhang et al. ⁸⁶ ).