磁性Fe_3O_4纳米粒子的双层改性

Madification of Magnetic Fe_3O_4 Nano Particles by Bilayer Surfactants

采用化学共沉淀法合成Fe3O4纳米粒子,并以油酸和SDBS为改性剂,水和乙醇为载液,制备出分散性好的磁性Fe3O4流体;阐述了双层表面活性剂改性的机理;通过X射线衍射和投射电镜研究表明,Fe3O4纳米微粒的平均粒径约为10 nm。

Fe3O4 magnetic nano -particles are synthesized by the chemical co -precipitation and modified by bilayer surfactants. Which are dispersed well. The modifiers are oleic acid and dodeeyl benzene sulfonic acid, sodium salt ; the mechanism of bilayer surfactants that modified Fe3O4 magnetic nano - particles are expatiated ;the average size of the Fe3O4 magnetic nano -particles is about 10 nm which is analysised by XRD and TEM.