PEI-b-PLA/Fe_3O_4磁性复合微球的制备及其性能表征  

Preparation and characterization of PEI-b-PLA/Fe_3O_4 magnetic composite microspheres

作　　者：张春晓[1] 徐鸣[1] 于楚男[1] 于颖敏[1] 周西臣[1] 

机构地区：[1]中国石油大学胜利学院化学化工系,东营257097

出　　处：《化工新型材料》2015年第11期82-84,91,共4页New Chemical Materials

基　　金：山东省高等学校科技计划项目(J12LD61)

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。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.

关 键 词：磁性FE3O4纳米粒子 磁性复合微球 丙交酯 星状聚合物 客体包裹 

分 类 号：TB33[一般工业技术—材料科学与工程]