亲水性丁香菌酯分子印迹微球的制备、表征与吸附性能的研究

本文以丁香菌酯为模板,甲基丙烯酸羟丙酯(HPMA)为亲水性功能单体,通过沉淀聚合法制备了亲水性丁香菌酯分子印迹微球(HMIMs),并采用紫外分光光度计,扫描电子显微镜(SEM)和激光粒度分析仪对亲水性丁香菌酯分子印迹微球(HMIMs)和非印迹微球(HNIMS)进行粒径、单分散性及形貌分析.通过动力学吸附、等温吸附和选择...

Preparation,Characterization and Adsorption Properties of Hydrophilic Syringostrobin Molecularly Imprinted Microspheres

In this paper,hydrophilic coumoxystrobin molecularly imprinted microspheres(HMIMs)were prepared by precipitation polymerization using coumoxystrobin as template and hydroxypropyl methacrylate(HPMA)as hydrophilic functional monomer.The hydrophilic HMIMs and HNIMs were characterized by UV spectrophotometer,scanning electron microscope(SEM)and laser particle size analyzer.The particle size,monodispersity and morphology were analyzed.The adsorption properties of HMIMs for coumoxystrobin in aqueous media were studied by kinetic adsorption,equilibrium adsorption and selective adsorption.The results showed that the molar ratio of template molecule,functional monomer and crosslinker to form stable complex was 1∶6∶30.There was a binding site in HMIMs with good shape,close particle size and monodispersity.The pseudo second order model showed that the adsorption process of coumoxystrobin with HMIMs belonged to chemical adsorption.In the adsorption isotherm experiment,the Langmuir theoretical maximum adsorption capacity of HMIMs was 53.35 mg/g(318 K),41.69 mg/g(298 K)and 39.42 mg/g(278 K),respectively,indicating that when the temperature was 318 K,the adsorption efficiency was the highest.The adsorption capacity of HMIMs for butyricide in aqueous medium was higher than that of HNIMs,indicating that HMIMs had better hydrophilicity than HNIMs.Langmuir adsorption isotherm indicated that the adsorption of coumoxystrobin by HMIMs belonged to single molecular layer adsorption.Selective adsorption indicated that HMIMs had high specificity for coumoxystrobin.The recoveries of environmental water samples were 85.85%~87.96%.