以聚乙烯亚胺(PEI)为添加剂,在聚乙二醇(PEG)中高温热分解乙酰丙酮铁(Fe(acac)3)和乙酰丙酮钴(Co(acac)2)制备CoxFe3-xO4纳米粒子.采用X射线粉末衍射仪(XRD)、透射电镜(TEM)、超导量子干涉仪(SQUID)、热重分析仪(TGA)、傅立叶变换红外光谱仪(FF-IR)、纳米粒度与zeta电位分析仪对样品进行表征.研究结果表明:所得的CoxFe3-xO4纳米颗粒平均粒径为9.2±1.3 nm,结晶性好,在室温下具有高的饱和磁化强度.PEG和PEI共同修饰于纳米CoxFe3-xO4粒子表面,使纳米CoxFe3-xO4粒子具有良好的水分散性.
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