HIGH STRENGTH AND TOUGHNESS PHOTOCROSSLINKED HYDROGEL MATERIAL, PREPARATION METHOD THEREFOR AND USE THEREOF

摘要

The present invention relates to a high strength and toughness photocrosslinked hydrogel material, a preparation method therefor and the use thereof. The high strength and toughness photocrosslinked hydrogel material is prepared from an o-nitrobenzyl phototrigger-modified photosensitive polymer derivative, a double-bond functional group-modified polymer derivative, and a photoinitiator as raw materials. In the present invention, by controlling the average arm length of a polyethylene glycol and a derivative thereof in the o-nitrobenzyl phototrigger-modified photosensitive polymer derivative, and the molar ratio of an o-nitrobenzyl phototrigger to the polyethylene glycol and the derivative thereof, a significant improvement in hydrogel properties is thus achieved. Compared to hydrogel prepared by the prior art, the strength and/or toughness of the hydrogel prepared by the present invention are/is improved by one order of magnitude or more, the bottleneck problem of the poor mechanical properties of current hydrogels is solved, and the application range of the hydrogels is broadened.