【摘要】 分别采用化学共沉淀法和开环聚合法合成了Fe3O4纳米粒子和星状聚合物PEI-b-PLA,然后采用自组装的方法合成了磁性复合微球PEI-b-PLA/Fe3O4。扫描电镜分析表明磁性复微球的粒径约为10nm,粒径大小主要取决于Fe3O4纳米粒子的粒径。热性能分析表明,PEI-b-PLA/Fe3O4复合微球的聚合物含量为6.6%。产物中Fe3O4含量较高。磁性能分析和紫外分析表明,磁性复合微球PEI-b-PLA/Fe3O4和聚合物PEI-b-PLA一样,可以包裹客体分子,同时具有超顺磁性。更多还原

【Abstract】 Fe3O4nanoparticles and star polymer PEI-b-PLA were synthesized by using chemical coprecipitation and ring-opening polymerization respectively,and then magnetic composite microspheres PEI-b-PLA/Fe3O4 were obtained through the method of self-assembly synthesis.TEM analysis showed that the particle size of microspheres was about10 nm,mainly depended on the particle size of Fe3O4 nanoparticles.TG analysis showed that the polymer content of microspheres PEI-b-Fe3O4/PLA was 6.6%and Fe3O4 content was higher in the product.VSM and UV analysis showed that the microspheres PEI-b-Fe3O4/PLA can accommodate guest molecules similar to polymer PEI-b-PLA and had superparamagnetism at the same time.更多还原