Recent progress on the research of high strength hydrogels

The hydrogel is a three-dimensional reticular polymer with high water content, which was used in various fields such as medicine, biology and environmental protection.However, the characteristic of lower mechanical properties limited its application.Therefore, the improvement of the mechanical strength of hydrogel has become the focus of researchers.This paper mainly introduced the progress of research on synthesis of several kinds of high strength hydrogel, including slip ring hydrogel, Tetra-PEG hydrogel, internal passing network hydrogel, double network hydrogel and nanocomposite hydrogel.The analysis of the influence factors on mechanical properties was discussed.