Editing the Shape Morphing of Monocomponent Natural Polysaccharide Hydrogel Films
Fabrication and shape morphing of chitosan hydrogel films with gradient cross-linking density. (a) Schematic illustration of the preparation and various shape-morphing behaviors of chitosan hydrogel films with gradient cross-linking density. (b–d) show the front view and left view of various 3D programmable deformations of CS hydrogel films in deionized water with different geometries, including helix () (b), short-side rolling () (c), and long-side rolling () (d), respectively. The scale bars are 5 mm.