【摘要】 在Fe3O4磁流体存在的条件下,以苯乙烯、甲基丙烯酸、N,N-亚甲基双丙烯酰胺、N-异丙基丙烯酰胺为共聚单体,在醇-水体系中采用分散聚合法制备了具有p H值敏感和温度敏感性的磁性高分子微球。采用扫描电镜(SEM)等考察了双敏感磁性微球的形态及结构,测得磁性微球的粒径约为1.5μm。研究了双敏感磁性微球对牛血清蛋白的吸附动力学性能,36 h时的平衡吸附量为565.6 mmol/g。吸附过程具有Freundlich等温吸附特征。更多还原

【Abstract】 The magnetic microspheres with p H- and thermo-sensitivity were prepared by dispersion polymerization in the presence of Fe3O4 magnetic fluid in an ethanol / water medium,using styrene,methacrylic acid,N,N-methylene-bis-acrylamide and N-isopropylacrylamide as comonomers. The morphology of the magnetic microspheres was studied by SEM,which shows that the diameter of the microspheres was 1. 5 μm. The adsorption kinetics of bovine serum albumin was investigated,and the results indicate that the equilibrium adsorption capacity was 565. 6 mmol / g and that the adsorption kinetics was controlled by liquid film diffusion. The adsorption process could be described with Freundlich model.更多还原