联苯三唑醇分子印迹聚合物的合成及吸附性能研究

Synthesis and Adsorption Property of Bitertanol Molecularly Imprinted Polymer

制备联苯三唑醇分子印迹聚合物(BMIP)并研究其特异识别能力。以联苯三唑醇为模板分子,α-甲基丙烯酸(MAA)为功能单体,采用本体聚合法合成分子印迹聚合物(MIP)。考察不同致孔剂对模板物质与功能单体相互作用力的影响,以及采用不同比例模板分子与功能单体合成的聚合物对联苯三唑醇的吸附量的影响,通过静态吸附实验研究吸附性能,并进行Scatchard分析。结果表明乙腈和四氢呋喃为致孔剂时,联苯三唑醇的最大吸收波长均发生红移,分别红移了5 nm和6 nm,且吸收峰均增强。由Scatchard分析可知,联苯三唑醇与MAA形成了两类结合位点,其解离常数KD1=3.16 mmol/L、KD2=107.53 mmol/L。四氢呋喃和乙腈更适合用于联苯三唑醇分子印迹聚合物的制备。合成的印迹聚合物对模板分子具有很强的亲和力和良好的识别能力,可以用做联苯三唑醇的分离材料。

A bitertanol molecularly imprinted polymer （BMIP） was prepared by the method of bulk polymerization under different ratios between template molecular and functional monomer, using bitertanol as template molecule and methacrylate acid （MAA） as functional monomer and its specific recognition ability was studied. The influence of different pore-foaming agents on the interaction between template molecular and functional monomer was investigated. The effect of the prepared polymer using different ratios template molecular and functional monomer on the adsorption content of bitertanol was also studied. Adsorption property of bitertanol was examined by static adsorption test and analyzed by Scatchard analysis. The maximum absorption wavelength of bitertanol by using acetonitrile and tetmhydrofumn as pore-foaming agents showed 5 nm and 6 um red shifts, respectively, and its absorption intensity increased. Scatchard analysis showed that bitertanol template molecule and functional monomer MAA formed two types of binding sites and the dissociation constants of the binding sites were 3.16 mmol/L and 107.53 mmol/L, respectively. TeWahydrofumn and acetonitrile were more suitable for the preperation of BMIP. The molecularly imprinted polymer can be used as the separation media ofbitertanol with high atYlnity and good specific recognition ability.