油酸低温水洗改性磁性四氧化三铁纳米粒子

摘要

通过对油酸改性四氧化三铁(Fe3O4)磁性纳米粒子的制备工艺的改进研究，成功制备了分散性好、磁响应性强的平均粒径在18 am的改性Fe3O4磁性纳米粒子，并通过X射线衍射、红外光谱、透射电镜等对制备的磁性纳米粒子进行了表征。结果表明：当采用60℃的反应温度进行改性处理，以蒸馏水进行洗涤时，得到的油酸改性Fe3O4磁性纳米粒子的分散性最好、磁响应性最强。%The magnetic Fe3O4 nano-particles modified with oleic acid were prepared at 60 ℃ reaction temperature and washed with distilled water. The modified Fe3O4 nano-particles were characterized by X-ray diffraction , infrared ray spectrum and TEM. The results showed that the Fe3O4 nano-particles modified by oleic acid had better dispersibility, stronger magnetic response and average grain size of 18 nm.