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以双酚A为模板分子,α-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制备了双酚A印迹聚合物。采用动态和静态两种方法研究了该印迹材料对双酚A的结合性能与分子识别特性。印迹材料对模板分子双酚A具有良好的特异性识别作用,经过Scatchard模型分析,双酚A印迹聚合物上有两类不同性质的结合位点,两种结合位点的解离常数分别为1.36和44.78 m L/g,对双酚A的最大表观吸附量分别为24.56μmol/g和312.6μmol/g。将该聚合物应用于固相萃取中,以食品包装材料为样品的加标回收实验表明,此印迹材料可以对痕量双酚A进行富集分离测定,且可重复使用。
Bisphenol A imprinted polymer was prepared by using bisphenol A as template molecule, α-methacrylic acid as functional monomer, ethylene glycol dimethacrylate as crosslinking agent and azobisisobutyronitrile as initiator. The dynamic and static methods were used to study the binding properties and molecular recognition properties of BPA. The imprinted material has a good specificity for bisphenol A template recognition. After Scatchard model analysis, there are two different types of binding sites on BPA imprinted polymer. The dissociation constants of the two binding sites are 1.36 And 44.78 m L / g respectively, the maximum apparent adsorption of bisphenol A were 24.56μmol / g and 312.6μmol / g, respectively. The polymer was applied to solid phase extraction. The spiked recovery experiments of food packaging materials showed that the imprinted material could be used to enrich and separate traces of bisphenol A and could be reused.