Abstract:

Double network （DN） hydrogel is a kind of bioadhesive polymers with three-dimensional network structure.

The traditional single network hydrogel is strengthened by forming interpenetrating polymer network of rigid network and

flexible network， which has high mechanical strength and toughness， and is widely used in the field of medicine and health.

In recent years， a variety of new DN hydrogels have emerged continuously， which endows traditional DN hydrogels with more

advantages such as rapid gelation and strong tissue adhesion， and further expands the application of DN hydrogels. In this

paper， the application and development status of DN hydrogel in the field of medicine and health in recent years were

reviewed.

Key words:

Double-network hydrogel, Medicine and sanitation, Clinical application