| A highly selective temperature-responsive molecularly imprinted polymer（MIP） hydrogel to salicylic acid （SA）was prepared by bulk polymerization at 60 ℃,using salicylic acid as template molecule,acrylamide as functional monomer,N-isopropyl acrylamide as temperature-responsive monomer,ethylene glycol dimethacrylate as cross-linker,and azobisisobutyronitrile as the initiator.The lower critical solution temperature（LCST） of molecularly imprinted polymer hydrogels is about 40 ℃.The temperature responsive molecularly imprinted polymer hydrogels showed good selectivity for SA,while non-imprinted hydrogels showed low selectivity,relative to those analogues of SA.The maximum adsorption capacity of the temperature-responsive molecularly imprinted polymer hydrogels reaches up to 6.35 mg/g,which is 3.66 times for that of non-imprinted polymer hydrogels.Compared with the molecularly imprinted polymer without adding temperature-responsive monomers,the adsorption and elution efficiency of the MIP hydrogels with SA were increased by 33.3% and 50%,respectively.Moreover,the temperature-responsive hydrogels could absorb or release SA when the temperature was changed. |