Hydrogels are there-dimensional polymer network in which the voids are filled with water.Hydrogels have been widely used in various fields including biomedical engineering.However,they have very limited applicability due to their poor mechanical strength.Therefore,many efforts have been focused on the enhancement of mechanical properties of hydrogels.This review mainly introduces some novel high strength hydrogels,such as slide-ring hydrogels,double network hydrogels,composite hydrogels and others and analyzes the factors affecting mechanical properties of hydrogels.Biocompatible,degradable,injectable,loading growth factor and high strength hydrogels as major research directions.
