由于PEI/Fe3O4磁流体具有良好的生物兼容性,因而被广泛应用于生物医药领域.本实验用共沉淀法制备出磁性Fe3O4纳米颗粒,通过一次包覆改性法将PEI(聚乙烯亚胺)包覆在磁性Fe3O4纳米颗粒上.利用X-射线衍射仪(XRD)、透射电子显微镜(TEM)、红外光谱仪(FTIR)、振动样品磁强计(VSM)、热重分析仪(TG)等方法对其进行了表征.结果表明,实验制备出颗粒度为10nm左右的颗粒,PEI较好的吸附在其表面,吸附率为33.6%,颗粒度饱和磁化强度为58.05 emu/g,包覆后有所降低,但较好保持着原有磁性.
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