Preparation and magnetic performance of the magnetic fluid stabilized by bi-surfactant

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• 作者：Buhe Bateer ; Yang Qu ; Xiangying Meng ; Chungui Tian ; Shichao Du ; Ruihong Wang ; Kai Pan ; Honggang Fu ; ^{fuhg@vip.sina.com}
• 关键词：Bi-surfactant coated Fe3O4 ; Phase-transfer ; Stable oil-dispersion ; Magnetic fluid ; Magnetic performance
• 刊名：Journal of Magnetism and Magnetic Materials
• 出版年：2013
• 出版时间：April, 2013
• 年：2013
• 卷：332
• 期：Complete
• 页码：151-156
• 全文大小：1022 K

文摘

A stable poly-alpha olefin oil based magnetic fluid of bilayer surfactant coated (oleic acid and succinimide) Fe₃O₄ nanoparticles was prepared by a using phase transfer method. The bilayer surfactant-coated magnetic particles are characterized by Fourier-transform infrared spectroscopy, the result shows that the Fe₃O₄ nanoparticles are coated by oleic acid, and the bilayer surfactant succinimide wraps the oleic acid coated Fe₃O₄ nanoparticles. Transmission electron microscopy images indicate that the dispersibility of the bilayer coated Fe₃O₄ nanoparticles is better than that of the uncoated ones. Vibrating sample magnetometer measurement confirms that both the coated and uncoated Fe₃O₄ nanoparticles are super-paramagnetic. Stability measurements show the magnetic fluids prepared by bilayer coated Fe₃O₄ nanoparticles is nearly constant for 360 days at room temperature.