色谱Issue(12)：1234-1241,8.DOI:10.3724/SP.J.1123.2015.08035
4-甲基咪唑磁性表面分子印迹聚合物的制备及其应用
Preparation and applications of 4-methyl imidazole magnetic surface molecularly imprinted polymers
摘要
Abstract
The magnetic surface molecularly imprinted polymers( MIPs)with specific recogni-tion of 4-methyl imidazole( 4-MI)were prepared by using 4-MI as template molecule,metha-crylic acid( MAA)as functional monomer and Fe3O4 as magnetic fluid. The polymers were characterized by of Fourier transform infrared spectrometer( FT-IR)analysis,X-ray diffraction ( XRD)analysis,transmission electron microscopy( TEM)and vibrating sample magnetometer ( VSM). The results demonstrated that an imprinted polymer layer was successfully coated onto the surface of modified Fe3O4 nanomaterials,resulting in a narrow diameter distribution and good magnetic responsibility. The ultraviolet( UV)spectrophotometry was used to demonstrate the interaction between 4-MI and MAA. It was found that one 4-MI molecule was entrapped by one MAA molecule,which was the main existing form of subject and object. By UV spectropho-tometric method to study the adsorption performance of magnetic molecularly imprinted poly-mers,the specific adsorption equilibrium and selectivity were evaluated by batch rebinding studies. The Scatchard analysis showed that there were two kinds of binding sites in the Fe3O4@(4-MI-MIP). The corresponding maximum adsorption capacities of 4-MI onto Fe3O4@(4-MI-MIP)were 40. 31 mg/g and 23. 07 mg/g,and the dissociation constants were 64. 85 mg/L and 30. 41 mg/L,respectively. The kinetic experimental data were correlated with second-order kinetic model. The magnetic molecularly imprinted polymers were used for the adsorption of 4-methyl imidazole in environmental water samples,and good results were obtained.关键词
4-甲基咪唑/Fe3O4磁性纳米微球/分子印迹聚合物/环境水Key words
4-methyl imidazole(4-MI)/Fe3O4 magnetic nanoparticles/molecularly imprinted polymers( MIPs)/environment water分类
化学化工引用本文复制引用
祁玉霞,赵丽娟,马梅花,魏缠玲,李亚,李文婧,龚波林..4-甲基咪唑磁性表面分子印迹聚合物的制备及其应用[J].色谱,2015,(12):1234-1241,8.基金项目
国家自然科学基金项目（31271868）；宁夏自然科学基金项目（NZ13045）． （）
