Abstract:

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.

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 nm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。