Hydrogels are required to have high mechanical properties, biocompatibility, and an easy
fabrication process for biomedical applications. Double-network hydrogels, although strong,
are limited because of the complicated preparation steps and toxic materials involved. In this
study, we report a simple method to prepare tough, in situ forming polyethylene glycol (PEG)–
agarose double-network (PEG–agarose DN) hydrogels with good biocompatibility. The
hydrogels display excellent mechanical strength. Because of the easily in situ forming …