【摘要】 以甲基丙烯酸-2-羟基乙酯为单体,N,N′-亚甲基双丙烯酰胺为交联剂,采用光化学方法在Fe3O4磁性液体中制备了磁性聚甲基丙烯酸-2-羟基乙酯微球,合成了含有稀土元素Tb的荧光磁性高分子微球,以牛血清白蛋白为模型对微球固定释放蛋白能力进行了研究,用VSM,PCS,FT-IR,TG-DTA,SEM,FS,UV-Vis等技术对微球的性能进行了表征.结果表明,荧光磁性高分子微球粒径为29.6nm,比饱和磁化强度为40.1emu/g,变异系数为3.7%,具有超顺磁性荧光性,分散性好,呈圆球形,对蛋白的装载率和包封率分别为6.5%和74.7%,pH越低蛋白释放率越高.更多还原

【Abstract】 Taking 2-hydroxyethyl methacrylate as the monomer, N,N′-methyl radical double acrylics amide as cross linking agent, magnetic nanometer particles including hydroxyl were prepared by photochemical synthesis in the magnetic fluid Fe3O4.Fluorescent magnetic polymer microspheres(FMPMs) were synthesized by combining Tb, and immobilized BSA on the suface of microspheres at the same time.The magnetism, average size, structure, morphology, fluorescence and loading properties of FMPMs were characterized by VSM, PCS, FT-IR, TG, SEM, FS and UV-Vis techniques.The results indicated that FMPMs had an average diameter of 29.6 nm, saturated magnetization ratio of 40.1 emu/g, variational coefficient of 3.7%, superparamagnetism, well fluorescence and dispersion and sphericity with the ratio of loading with BSA of 6.5%, and ratio of coating with BSA of 74.7%.Moreover, their protein release rate decreased with pH reduction.更多还原