Effect of Different pH on Characterization of Oil-Based Magnetic Fluid

Abstract:

In this paper, the oil-based magnetic fluid was prepared by chemical co-precipitation method and sodium oleate was the surfactant. The effect of different pH on the characterization of magnetic fluid was studied. The characterization was detected by Fourier Transform Infrared spectroscopy (FT-IR), Transmission Electron Microscope (TEM) and Vibrating Sample Magnetometer (VSM). The results show that the nanoparticles were coated successfully by sodium oleate at pH=5. And the saturation magnetization of Fe₃O₄ magnetic nanoparticles is 58.0 emu/g, the saturation magnetization of magnetic fluid prepared is 20.2 emu/g, and the Fe₃O₄ particles are dispersed well. Although the Fe₃O₄ magnetic particles coated by sodium oleate at pH = 10.5 has a higher saturation magnetization (67.8 emu/g), but the magnetic fluid is less stable and has an obvious settlement phenomenon.

• Periodical: Applied Mechanics and Materials (Volume 574)
• Pages: 338-341
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.574.338
• Online since: July 2014
• Authors: Zi Fen Zhao*, Hui Ping Shao, Sen Sun
• Keywords: Fe₃O₄ Magnetic Particles, pH, Saturation Magnetization, Sodium Oleate

References

[1] Ren Z Q, Hong R Y, B. Xu, et al. Preparation and characterization of kerosene based Fe3O4 magnetic fluid[J]. New chemical materials, 36 (2) (2008)47-49.

[2] Kim M, Jung J, Lee J, et al. Amphiphilic comblike polymers enhance the colloidal stability of Fe3O4 nanoparticles. Colloids and Surfaces B: Biointerfaces, 76(2010)236-240.

DOI: 10.1016/j.colsurfb.2009.10.042

[3] Qian J G, Yang Z Y. Characteristics of a magnetic fluid seal and its motion in an axial variable seal gap. Journal of China University of Mining & Technology, 18(2008)634-636.

DOI: 10.1016/s1006-1266(08)60308-9

[4] Li X H, Liu Z F, An H, et al. Preparation of nano-magnetic fluid using plasma technique and its application in safety valves. Surface & Coatings Technology, 201(2007)5371-5374.

DOI: 10.1016/j.surfcoat.2006.07.041

[5] Shen C, Huang W, Ma G L, et al. A novel surface texture for magnetic fluid lubrication. Surface & Coatings Technology, 204(2009)433-439.

DOI: 10.1016/j.surfcoat.2009.08.003

[6] Chai B, Zhang W J, Li D Z. Nano magnetic fluid and its application in water resource conservation. Environmental Science and Technology, 27(2004) 159-162.

[7] Walker M S, Devernoe A L. Mineral separations using rotating magnetic fluids. International Journal of Mineral Processing, 31(3) (1991)195-216.

DOI: 10.1016/0301-7516(91)90026-f

[8] Hong R Y, Feng B, Ren Z Q, et al. The stability and rheological properties of oil-based nanometer Fe3O4 magnetic fluid [J]. Fine petrochemical industry, 25(5) (2008)27-30.

[9] Ren H Y, Zhuang H, Liu Y J. Surface modification of Fe3O4 nanoparticles[J]. Chemical Research, 14(1) (2003) 11-13.

[10] Xu H X, Li R, Xu P H. Preparation and performance analysis of Fe3O4 magnetic fluid[J]. Journal of Yanshan University, 36(3) (2012)145-148.

[11] Zhao X D, Feng Q M, Wang W Q. The preparation and surface modification of the magnetic Fe3O4 nanoparticles[J]. Applied chemistry, 39(2) (2010) 171-174.

[12] Tan Y M, Shao H P, Ji Y, et al. Study on the preparation and properties of the stability of oil based nano Fe3O4 magnetic fluid[J]. PM technique, 30(3)( 2012)163-166.

[13] Wang L S, Ren Z Q, Gong C H et al. Preparation and application of toluene based magnetic fluid[J]. Fine petrochemical industry, 24(6) (2007) 29-34.

[14] Hong R Y. Preparation and application of magnetic nanoparticles and magnetic fluid[M]. Bei Jing: Chemical Industry Press, 2008. 112.