Hydrogel, preparation method thereof and applications

The invention discloses a hydrogel, a preparation method thereof and application The hydrogel is prepared by a simple light-operated 'tetrazolium and an alkene' click chemistry method, wherein the method has advantages of high efficiency, speediness, strong specificity, no need of catalyst and space-time controllability. The hydrogel prepared by the method not only has good mechanical properties, controllable gel time and excellent cell compatibility, but also can implement nondestructive wrapping and completely controllable release of a medicament and a cell. Therefore the light-operated 'tetrazolium and an alkene' click chemistry hydrogel has good application prospect in medicament controllably- releasing carrier and tissue engineering support material fields.