Thermosensitive hydrogels are a kind of functional polymer materials with widely potential applications

which is limited due to the slow response rate for conventional hydrogels .Recently many researches have been focused on improving the response rate of hydrogels .This paper reviewed the development of fast response thermosensitive hydrogels in recent years in several aspects :preparation of porous and copolymer hydrogels

synthesis of comb-type grafted hydrogels and submicron hydrogel particles

using silane cross-linking agents

cold-treatment or cold polymerization/crosslinking reaction

and other techniques .Some phenomena of these hydrogels were discussed as well .