论文部分内容阅读
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),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FTIR、TEM、VSM、Zeta电位对磁性粒子组分、形貌、粒径、磁学性能和电位性能进行表征。该法简便,反应条件温和,所制备的PEI功能化Fe3O4纳米粒子具有良好的超顺磁性和分散性。
DHCA-functionalized Fe3O4 nanoparticles were prepared by using Fe3O4 magnetic nanoparticles coated with oleic acid as raw materials, 3,4-dihydroxyphenylpropionic acid (DHCA) as surface modifier and THF as solvent. The prepared functionalized Fe3O4 nanoparticles were conjugated with polyethyleneimine (PEI) to obtain stable dispersed polyethyleneimine functionalized Fe3O4 magnetic composite nanoparticles. The FTIR, TEM, VSM and Zeta potential were used to characterize the magnetic particle composition, morphology, particle size, magnetic properties and potential performance. The method is simple and the reaction conditions are mild. The prepared PEI functionalized Fe3O4 nanoparticles have good superparamagnetism and dispersibility.