离子液体-水双相体系悬浮聚合法制备对苯二酚分子印迹聚合物微球

Preparation of Molecularly Imprinted Polymer Microspheres of Hydroquinone by Suspension Polymerization in Two-phase System of Ionic Liquid-based Aqueous

通过在[Bmim]PF6离子液体-水双相体系中,以对苯二酚为模板分子,甲基丙烯酸为功能单体,二甲基丙烯酸乙二醇脂为交联剂,采用悬浮聚合法制备得到对苯二酚印迹聚合物微球(MIMs-IL),并通过FTIR等测试技术对MIMs-IL进行了表征。对不同离子液体进行了选择,[Bmim]PF6介质中制备的MIMs-IL的识别性能最好。与从氯仿介质中制备的印迹聚合物微球(MIMs-Or)相比较,MIMs-IL的产率为70.8%,明显高于MIMs-Or的48.7%。采用静态吸附法考察其印迹识别能力的结果表明,MIMs-IL对水中的对苯二酚的识别能力大大强于MIMs-Or。对MIMs-IL识别吸附的热力学和动力学研究结果表明,12h时MIMs-IL及其非印迹聚合物微球(nMIMs-IL)均达到各自饱和吸附量,对于0.50g/L对苯二酚水溶液,MIMs-IL的饱和吸附量是nMIMs-IL的2.67倍。

The molecularly imprinted microspheres（MIMs-IL） were synthesized with hydroquinone as template molecules,α-acrylic acid as functional monomer and ethylene glycol dimethacrylate as cross-linker by suspension polymerization in two-phase system of ionic liquid-based aqueous.The MIMs-IL was characterized by FTIR and its selective recognition was evaluated by adsorption experiments.[Bmim]PF_6 was selected from three different types of IL.Compared with that of the molecularly imprinted microspheres（MIMs-Or） prepared in two-phase system of chloroform-aqueous,the yield of MIMs-IL,70.8% is obviously higher than that of MIMs-Or,48.7%.The recognition adsorption of MIMs-IL for hydroquinone in water solution is higher than that of MIMs-Or.Moreover,the results of thermodynamics and kinetics of the recognition adsorption of MIMs-IL show that the saturation adsorption amount was achieved in 12 h,and MIMs-IL displayed a 2.67-fold increase in adsorption amount for 0.50 g/L hydroquinone water solution compared to its none molecularly imprinted microspheres（nMIMs-IL）.