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以三硝基甲苯(TNT)为模板分子,EDMA为交联剂,采用沉淀聚合法制备了TNT分子印迹微球.讨论了溶剂用量、模板分子用量、功能单体种类等对分子印迹微球的形貌及吸附性能的影响;利用紫外吸收光谱和BET表征了印迹聚合物微球的结合位点相互作用与印迹孔穴结构;通过平衡吸附和选择性吸附实验,研究了印迹聚合物微球的吸附性能和选择性识别性能.结果表明,以丙烯酰胺为功能单体制备的分子印迹聚合物为规则的球形,内部含有分子印迹孔穴,微球的粒径为1～2μm.印迹聚合物微球可在30 min内达到吸附平衡,在1 mmol/L的TNT乙醇溶液中,印迹聚合物微球的平衡吸附量为32.5 mmol/kg,对TNT分离系数为25.19,具有较好的特异性吸附能力,并可选择性识别TNT分子.
TNT molecular imprinted microspheres were prepared by using TNT as the template and EDMA as the crosslinker, and the molecular imprinted microspheres were prepared by precipitation polymerization.The effects of the amount of solvent, the amount of template and the type of functional monomer Morphology and adsorption properties of the imprinted polymer microspheres. The binding sites of the imprinted polymer microspheres and the pore structure of imprinted polymer microspheres were characterized by UV absorption spectroscopy and BET. The adsorption of imprinted polymer microspheres was studied by equilibrium adsorption and selective adsorption experiments Performance and selective recognition performance.The results show that the molecularly imprinted polymer prepared with acrylamide as a functional monomer has a regular spherical shape and contains molecularly imprinted pores in the interior of the microspheres with a particle size of 1-2 μm.The imprinted polymer microspheres can be The adsorption equilibrium reached within 30 min. In 1 mmol / L TNT ethanol solution, the equilibrium adsorption capacity of the imprinted polymer microspheres was 32.5 mmol / kg, the separation coefficient for TNT was 25.19, which showed good specific adsorption capacity. And can selectively recognize TNT molecules.