Journal of South China University of Technology (Natural Science Edition) ›› 2006, Vol. 34 ›› Issue (12): 92-95,100.

• Chemistry,Chemical & Energy Engineering • Previous Articles     Next Articles

Characterization and Magnetic Resonance of Magnetic Chitosan Microsphere

Kou Ling-mei  Li Bing  Guo Si-yuan  Li Lin  Jie-zhen   

  1. Research Institute of Light Industry and Chemical Engineering,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China
  • Received:2005-07-17 Online:2006-12-25 Published:2006-12-25
  • Contact: 寇灵梅(1972-) ,女,博士生,主要从事溶液电磁学及其应用研究. E-mail:klmlady@126. com
  • About author:寇灵梅(1972-) ,女,博士生,主要从事溶液电磁学及其应用研究.
  • Supported by:

    国家自然科学基金资助项目(20306007) ;高等学校博士学科点专项科研基金资助项目( 20050561014) ;广东省自然科学基金重点项目(04105934)

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Abstract:

Magnetic chitosan microspheres were synthesized by means of the reverse-·phase suspension cross-linking technique,with glutaraldehyde as the cross-linker and Fe3O4as the magnetic core.The morphology,particle size an d chemical structure of the prepared microspheres were then characterized using the digital optical microscope,the laser granularity meter and the PnR.an d the magnetic resonance ofthe microspheres Was investigated using the atom-absorbing spectrophotometer,the magnetic balance and the adjustable magnetic field.The results demonstrate
that the prepared magnetic chitosan microspheres are well-shaped spheres with a diameter from 50 to 200 μm,in which Fe3O4 particles disperse uniformly,and that,when the mi crospheres in an exte .rnal magnetic field are ofa dia-meter of less than 280μm,its magnetic susceptibility and sedimentation rate increase with the size.It is indicated that the prepared magnetic chitosan microspheres are of excelent magnetic resonan ce.

Key words: magnetic cores, magnetic resonance, magnetic susceptibility, sedimentation