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Properties of Polyalphaolefin-Based Ferrofluids

  • Kim, Jong-Hee ;
  • Park, Keun-Bae
  • Received : 2015.07.18
  • Accepted : 2015.09.21
  • Published : 2015.12.31

Abstract

Magnetite nanoparticles were synthesized by adding excess ammonium hydroxide to a solution of iron (II) and (III) chlorides. The surfactants of oleic acid and Span 80 were applied in sequence to the magnetic particles as a combined stabilizer, and poly-${\alpha}$-olefin (PAO) 30 or 60 was used as the liquid base with a low or high viscosity, respectively. The ferrofluids were prepared with the concentrations of 200, 300, 400, and 500 mg/mL, and characterized by density, dispersion, magnetization, and viscosity. The density of the fluids increased proportionally to the concentration from 0.98 to 1.27 g/mL and 1.01 to 1.30 g/mL with PAO 30 base and PAO 60 base, and the dispersion stability was 77-95 and 81-74% for the PAO-30 and PAO-60-based fluids, respectively. The observed saturation magnetization values of the PAO-30 and PAO-60-based ferrofluids were 16 to 42 mT and 17 to 41 mT with the concentration increase in the range 200-500 mg/mL, respectively, depending upon the content of magnetic particles in the fluid. The viscosity variation of the PAO-30 and PAO-60-based ferrofluids in the temperature range $20-80^{\circ}C$ was the least with the concentrations of 400 and 300 mg/mL, respectively.

Keywords

nanoparticles;fluid concentration;dispersion;saturation magnetization;viscosity

References

  1. R. Betancourt-Galindo, O. Ayala-Valenzuela, L.A. Garcia- Cerda, O. Rodriguez Fernandez, J. Matutes-Aquino, G. Ramos, and H. Yee-Madeira, J. Magn. Magn. Mater. 294, e33 (2005). https://doi.org/10.1016/j.jmmm.2005.03.049
  2. A. L. Drummond, N. C. Feitoza, G. C. Duarte, M. J. A. Sales, L. P. Silva, J. A. Chaker, A. F. Bakuzis, and M. H. Sousa, J. Nanosci. Nanotechnol. 12, 8061 (2012). https://doi.org/10.1166/jnn.2012.6614
  3. Jong-Hee Kim, Sang-Mun Kim, and Yong-Il, J. Nanosci. Nanotechnol. 14, 8739 (2014). https://doi.org/10.1166/jnn.2014.9993
  4. Havva Ya ci Acar, Rachel S. Garaas, Faisal Syud, Peter Bonitatebus, and Amit M. Kulkarni, J. Magn. Magn. Mater. 293, 1 (2005). https://doi.org/10.1016/j.jmmm.2005.01.035
  5. Juliana B. Silva, Walter de Brito, and Nelcy D. S. Mohallem, Mater. Sci. Eng. B 112, 182 (2004). https://doi.org/10.1016/j.mseb.2004.05.029
  6. Dan Wang, Qian Ma, and Ping Yang, J. Nanosci. Nanotechnol. 12, 6432 (2012). https://doi.org/10.1166/jnn.2012.6439
  7. Andrew Senyei, Kenneth Widder, and George Czerlinski, J. Appl. Phys. 49, 3578 (1978). https://doi.org/10.1063/1.325219
  8. Jong Hee Kim, CheolGi Kim, Seung Goo Lee, Tae Min Hong, and Joon Hong Choi, J. Nanosci. Nanotechnol. 13, 6055 (2013). https://doi.org/10.1166/jnn.2013.7638
  9. C. J. Sambucetti, IEEE Trans. Magn. Magn. 16, 364 (1980). https://doi.org/10.1109/TMAG.1980.1060605
  10. Vicki Caligur, BioFiles 3, 14 (2008).
  11. J. Shimoiizaka, K. Kakatsuka, T. Fujita, and A. Kounosu, Fine Particles Processing, A. I. Min. Met. & Pet. Eng. Inc., New York (1980) pp. 1310-1324.
  12. Jong-Hee Kim and Keun-Bae Park, J. Nanosci. Nanotechnol. 16, (2016) in press.

Acknowledgement

Supported by : National Research Foundation of Korea (NRF)