化工学报2012，Vol.63Issue(12)：4089-4095,7.DOI:10.3969/j.issn.0438-1157.2012.12.050
聚乙二醇/聚乙烯吡咯烷酮修饰的纳米Fe3O4粒子的制备与表征
Synthesis and characterization of Fe3O4 nanoparticles coated with poly(ethylene glycol)and poly(vinyl pyrrolidone)
摘要
Abstract
To obtain magnetic nanoparticles (NPs) with good water dispersibility,Fe3O4 nanoparticles were synthesized by thermal decomposition of the iron ( HI ) acetylacetonate ( Fe (acac)3) in poly(ethylene glycol) (PEG) containing poly (vinyl pyrrolidone) (PVP) of different molecular weight as modifying agents. The samples were characterized with X-ray diffraction (XRD),transmission electron microscopy (TEM),high resolution transmission electron microscopy (HRTEM),superconductivity quantum interference device (SQUID),thermogravimetric analysis (TGA),Fourier transform infrared spectroscopy (FT-IR),and particles & zeta potential analyser. The stability of Fe3O4 nanoparticles dispersed in physiological saline and physiological buffers was investigated. The prepared Fe3O4 nanoparticles had high crystallinity,and showed superparamagnetic behavior at 300 K with higher saturate magnetization. The surfaces of Fe3O4 nanoparticles were modified by PEG and PVP which provided good water dispersibility. The Fe3O4 nanoparticles revealed high dissolubility and stability in physiological saline and physiological buffers. The surfaces of Fe3O4 nanoparticles were electrically neutral in water,and steric hindrance effect of the surface modified layer might be the main reason for high dispersion stability of the prepared nanoparticles in aqueous solution.关键词
纳米Fe3O4/修饰/水分散性/生理缓冲液/稳定性Key words
Fe3O4 nanoparticles/modification/water-dispersibility/physiological buffers/stability分类
化学化工引用本文复制引用
涂志江,张宝林,冯凌云,赵方圆..聚乙二醇/聚乙烯吡咯烷酮修饰的纳米Fe3O4粒子的制备与表征[J].化工学报,2012,63(12):4089-4095,7.基金项目
国家自然科学基金项目(50962005,51162003). （50962005,51162003）
