Figure 2.

Synthesis roadmap of polysaccharide materials. (A) schematic diagram of the preparation of methyl acrylamide chitosan (MC) [30]. (B) schematic diagram of the preparation of a glutaraldehyde-modified collagen–chitosan composite scaffold [31]. (C) schematic diagram of the preparation of Poly (ε-caprolactone) (PCL)-modified chondroitin sulfate composite scaffold [33].