Ice-templated hydrogels based on chitosan with tailored porous morphology

► Ice-templated hydrogels based on chitosan with tailored morphology. ► Poly(methylmethacrylate) (PMMA) as fractionated particles as polymer porogen. ► Internal morphology of the gels controlled by the speed of crystallization. ► Microstructure of chitosan hydrogels controlled by the mesh of PMMA particles.