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Citation: ZHANG Wen-Jun, ZHANG Hui-Fang, LI De-Zhong. Preparation of Fe₃O₄ Magnetic Fluid by One-Step Method with a Microemulsion Reactor[J]. Chinese Journal of Applied Chemistry, ;2005, 22(7): 734-738. shu

Preparation of Fe₃O₄ Magnetic Fluid by One-Step Method with a Microemulsion Reactor

1.
Department of Chemistry, Huazhong University of Science and Technology, Wuhan 430074

Corresponding author: LI De-Zhong,
Received Date: 19 September 2004
Available Online: 30 January 2005
Fund Project: 湖北省自然科学基金(2002AB081)资助项目 (2002AB081)

A W/O microemulsion was prepared with Span80-PS (petroleum sulfonate) as composite emulsi-fier,isopropanol as cosurfactant and kerosene as oil phase.The optimal microemulsion conditions were found from pseudoternary phase diagrams,i.e.,the mass ratio of Span80 to PS is 4:1 and that of composite emulsifier to cosurfactant is 1:1.The Fe₃O₄ fluid was obtained by one-step method with the W/O micro-emulsion as microreactor to synthesize magnetic nanoparticles (reaction temperature is 30℃ and reaction time is 5 h) and kerosene as carrier liquid.The magnetic fluid was investigated by means of TEM,XRD and fluorescence microscopy.The magnetism of Fe₃O₄ fluid was determined by virtue of a Gouy magnetic balance.The average particle size is 7.4 nm,and magnetic particles are well-dispersed.The stable Fe₃O₄ magnetic fluid with good magnetism may be prepared by one-step method in the microemulsion.Accordingly,the traditional preparation method of magnetic fluid can be simplified greatly.
- microemulsion,
- magnetic fluid,
- pseudoternary phase diagram,
- one-step
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Preparation of Fe₃O₄ Magnetic Fluid by One-Step Method with a Microemulsion Reactor