A multifunctional stabilizer of magnetic fluids

Lebedev, A. V.; Lysenko, S. N.
July 2009
Applied Physics Letters;7/6/2009, Vol. 95 Issue 1, p013508
Academic Journal
This study reports the discovery of the universal surfactant-polyoxipropylene, which maximally extends the range of carrier fluids for magnetic colloids. A magnetic fluid on the base of ethyl alcohol has been synthesized and its magnetic and rheological properties have been investigated. It has been found that the magnetic nanoparticles are covered by a monolayer of surfactant molecules. The fluid preserves fluidity at temperatures as low as -100 °C. Coagulation stability, with respect to the added kerosene, has been explored. It is suggested to use this effect for preparing the magnetocontrollable extractors of ethyl alcohol.


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