聚乙二醇/聚乙烯亚胺修饰的Co_xFe_(3-x)O_4纳米粒子制备与表征  

Synthesis and Characterization of Co_xFe_(3-x)O_4 Nanoparticles Coated with Poly( Ethylene Glycol) and Poly( Ethylene Imine)

作　　者：陈运鹏 张宝林[1] 谢松伯 李璇[1] 

机构地区：[1]桂林理工大学材料科学与工程学院广西有色金属及特色材料加工重点实验室省部共建国家重点实验室培育基地,桂林541004

出　　处：《人工晶体学报》2016年第1期58-63,共6页Journal of Synthetic Crystals

基　　金：国家自然科学基金(51162003)

摘　　要：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Co_xFe_(3-x)O_4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(FT-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Co_xFe_(3-x)O_4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Co_xFe_(3-x)O_4粒子表面,使纳米Co_xFe_(3-x)O_4粒子具有良好的水分散性。Co_xFe_(3-x)O_4 nanoparticles were synthesized by thermal decomposition of iron(Ⅲ) acetylacetonate(Fe(acac)_3) and cobalt(Ⅱ) acetylacetonate(Co(acac)_2) in poly(ethylene glycol)(PEG) containing poly(ethylene imine)(PEI) as modifying agents.The products were characterized by X-ray diffraction(XRD),transmission electron microscopy(TEM),superconductivity quantum interference device(SQUID),thermogravimetric analysis(TGA),fourier transform infrared spectroscopy(FT-IR) and particles & zeta potential analyzer.The results show that the average grain size of Co_xFe_(3-x)O_4 is about 9.2±1.3 nm.The prepared Co_xFe_(3-x)O_4 nanoparticles have high crystallinity and high saturate magnetization at room temperature.The surfaces of Co_xFe_(3-x)O_4 nanoparticles were modified by PEG and PEI,which provided the nanoparticles excellent water dispersibility.

关 键 词：CoxFe3-xO4纳米粒子 高温热分解法 聚乙二醇 聚乙烯亚胺 饱和磁强度 

分 类 号：TB383.1[一般工业技术—材料科学与工程]