论文部分内容阅读
以吡蚜酮为模板分子,甲基丙烯酸为功能单体,乙二醇二甲基丙烯酸酯为交联剂,偶氮二异丁腈为引发剂,采用本体聚合法制备了吡蚜酮分子印迹聚合物。实验优化了模板分子与功能单体的摩尔比,通过吸附动力学和等温吸附实验对聚合物的吸附性能进行了表征,利用拟二级动力学模型和Scatchard分析研究了聚合物对目标物的吸附行为。实验结果表明:模板分子与功能单体摩尔比为1∶4时,制备的吡蚜酮分子印迹聚合物具有较好的印迹效果,最优条件下聚合物的吸附容量为25.11mg/g,印迹因子为3.0,可在80min内达到吸附平衡(20mg/L);聚合物对目标物的吸附行为符合拟二级动力学模型(R2=0.999),Scatchard分析结果表明聚合物在聚合过程中形成了较为明显的印迹位点,对目标物呈现一致的亲和力。
The pymetrozine molecular imprinted was prepared by bulk polymerization using pymetrozine as the template molecule, methacrylic acid as the functional monomer, ethylene glycol dimethacrylate as the crosslinking agent, and azobisisobutyronitrile as the initiator polymer. The molar ratio of the template molecule to the functional monomer was optimized. The adsorption properties of the polymer were characterized by adsorption kinetics and isothermal adsorption experiments. The adsorption of the target on the polymer was studied by pseudo second-order kinetic model and Scatchard analysis behavior. The experimental results show that the prepared molecularly imprinted polymer has a good imprinting effect when the molar ratio of template molecule to functional monomer is 1: 4. Under the optimal conditions, the adsorption capacity of the polymer is 25.11 mg / g, The adsorption equilibrium (20mg / L) reached within 80min with the factor of 3.0. The adsorption behavior of the target compound was in accordance with the pseudo second-order kinetic model (R2 = 0.999). Scatchard analysis showed that the polymer formed in the polymerization process The more obvious sites of imprinting show a consistent affinity for the target.