• Volume 33 Issue 6
    Jul.  2021
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    JI Ye, SHAO Hui-ping, GUO Zhi-meng, LIN Tao, YANG Dong-hua. Preparation of Fe3O4 magnetic nanoparticles by ultrasonic emulsification and research of magnetic fluids with chitosan modification[J]. Chinese Journal of Engineering, 2011, 33(6): 751-755. doi: 10.13374/j.issn1001-053x.2011.06.005
    Citation: JI Ye, SHAO Hui-ping, GUO Zhi-meng, LIN Tao, YANG Dong-hua. Preparation of Fe3O4 magnetic nanoparticles by ultrasonic emulsification and research of magnetic fluids with chitosan modification[J]. Chinese Journal of Engineering, 2011, 33(6): 751-755. doi: 10.13374/j.issn1001-053x.2011.06.005

    Preparation of Fe3O4 magnetic nanoparticles by ultrasonic emulsification and research of magnetic fluids with chitosan modification

    doi: 10.13374/j.issn1001-053x.2011.06.005
    • Received Date: 2010-08-06
      Available Online: 2021-07-30
    • Fe3O4 magnetic nanoparticles were prepared by means of ultrasonic emulsification and then the Fe3O4 magnetic fluid was made by dispersing these particles into water with chitosan as surfactants.The influences of the molar ratio of Fe2+ to Fe3+,ultrasonic time and the amount of chitosan on the magnetic properties of the magnetic fluid were investigated.The results show that ideal Fe3O4 magnetic nanoparticles can be obtained under the condition that the molar ratio of Fe2+ to Fe3+ is 1:1.5 and the reaction temperature is 70℃ when dropping ammonia.The prepared magnetic fluid has high specific saturation magnetization and stability when the volume of the 1% chitosan solution is 50% as large as the total volume of the mixed Fe3O4 solution and the ultrasonic time after dropping chitosan is 7.5 min,which are in favor of coating the magnetic particles with chitosan.

       

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