磁性分子印迹微球的合成及吸附性能研究

Preparation and absorption ablity of magnetic molecularly imprinted polymer microsphere

通过分子印迹方法,以阿司匹林(Asp)为模板分子,分别以丙烯酰胺(AM)和环糊精(β-CD)为功能单体,在表面经油酸改性的Fe3O4粒子表面引发聚合得到磁性分子印迹聚合物微球。采用红外光谱、紫外分光光度计进行了结构表征和吸附性研究,利用等温吸附数据进行Scalchard分析。结果表明:表面经油酸改性的Fe3O4粒子可成功进行单体的表面聚合;以β-CD为功能单体的磁性分子印迹微球的最大吸附量为与未引入磁性粉体的分子印迹微球保持同一水平,但以AM为功能单体的磁性微球的印迹效应随磁性Fe3O4的引入略有降低,综合比较,β-CD更适宜用作磁性分子印迹微球的功能单体。

Magnetic molecularly imprinted polymer（MMIP）was prepared by using aspirin（Asp）as template mole- cule, aerylamide beta and cyclodextrin（β-CD）as functional monomer and Fe2 O4 magnetic fluid. IR spectrum and UV spectro- photometry were used to characterize the structure and recognition. The adsorption and selectivity properties were analyzed by Scatchard analysis. The results indicated that the polymerization on the surface of Fez 04 which was modified by oleic acid can be proceed,and the maximum absorption amount maintained the same level that Fe2O3 magnetic fluid wasn＇t in- duced. However, the imprinted effect of MMIP descended a little with the addition of Fe2 04 magnetic fluid. In a word, β-CD was more appropriate for the functional monomer of magnetic molecularly imprinted polymer.