聚乙烯亚胺功能化Fe3O4纳米粒子的制备

Preparation of Poly(ethylenimine) Functional Fe3O4 Nanoparticles

摘要:

本文以油酸包覆的Fe3O4磁性纳米粒子为原料，3,4-二羟苯基丙酸(DHCA)为表面改性剂，四氢呋喃(THF)为溶剂制备出DHCA功能化的Fe3O4纳米粒子。将制备得到的功能化Fe3O4纳米粒子偶联聚乙烯亚胺(PEI)，成功得到稳定分散的聚乙烯亚胺功能化Fe3O4磁性复合纳米粒子。利用FT-IR、TEM、VSM、Zeta电位等对磁性粒子组分、形貌、粒径、磁学性能和电位性能进行表征。结果表明该方法简便，反应条件温和，所制备的PEI功能化的Fe3O4纳米粒子具有良好的超顺磁性和分散性。

Abstract:

In this paper, oleic acid coated Fe3O4 nanoparticles were functionalized by 3,4-Dihydroxybenzenepropionic acid (DHCA) in tetrahydrofuran (THF). After conjugated by polyethylene (PEI) the functionalized Fe3O4 nanoparticles were well dispersed in water. The morphology, size distribution, magnetic properties and potential of the magnetic particles were characterized by TEM FT-IR, VSM, and Zeta potential, respectively. The results show that this method is simple, the PEI functionalized Fe3O4 nanoparticles have superparamagnetic properties and excellent dispersion.