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以乙氧酰胺苯甲酯为模板分子,甲基丙烯酸为功能单体,季戊四醇三丙烯酸酯为交联剂,在过氧化苯甲酰和N,N-二甲基苯胺的引发作用下,制备了乙氧酰胺苯甲酯的分子印迹聚合物微球。优化的致孔溶剂为乙腈,模板、单体和交联剂的摩尔比为1∶6∶20。采用高效液相色谱法测定模板分子及其结构类似物的浓度,结合静态平衡吸附实验、吸附动力学实验和选择性评价,对聚合物的吸附性能进行了研究,所得微球的静态吸附量为15.0μmol·g-1,印迹因子为4.93。采用扫描电子显微镜、红外光谱仪和差示扫描量热仪表征聚合物的理化特性,结果表明,微球的形貌规则,印迹效应显著,热稳定性较好。本研究所采用的氧化还原引发方法具有制备简便、成本低以及特异性好等优点,为分子印迹聚合物的引发制备提供了新思路。
Using ethylamidobenzyl ester as template molecule, methacrylic acid as functional monomer and pentaerythritol triacrylate as cross-linking agent, under the initiation of benzoyl peroxide and N, N-dimethylaniline, Molecularly Imprinted Polymer Microspheres of Ethoxyamide Benzyl Ester. The optimized pore-forming solvent is acetonitrile, and the molar ratio of template, monomer and crosslinker is 1: 6: 20. The concentration of template molecule and its structural analogues was determined by high performance liquid chromatography (HPLC), and the adsorption capacity of the polymer was studied by static equilibrium adsorption experiment, adsorption kinetics experiment and selective evaluation. The static adsorption capacity of the obtained microspheres was 15.0μmol · g-1, and the blotting factor was 4.93. The physical and chemical properties of the polymer were characterized by scanning electron microscopy, infrared spectroscopy and differential scanning calorimetry. The results showed that the morphology of microspheres was good, the imprinting effect was obvious and the thermal stability was good. The redox initiation method used in this study has the advantages of simple preparation, low cost and good specificity, which provides a new idea for the preparation of molecularly imprinted polymers.