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Characterization and application of magnetic P (St-co-MAA-co-AM)/SiO2 microspheres
Liu Zuli 1 *,liu Pandong 1,Liu Cuicui 1,Yao Kailun 1,Ning Qin 1,Xi Dong 1,Xu Huaping 2
1.Huazhong University of Science and Technology
2.Shanghai University of Traditional Chinese Medicine
*Correspondence author
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Funding: 教育部博士点基金（No.20030487003）
Opened online:24 October 2006
Accepted by: none
Citation: Liu Zuli,liu Pandong,Liu Cuicui.Characterization and application of magnetic P (St-co-MAA-co-AM)/SiO2 microspheres[OL]. [24 October 2006] http://en.paper.edu.cn/en_releasepaper/content/8943
 
 
A sol-gel procedure was used to cover magnetic P (St-co-MAA-co-AM) microspheres with SiO2 shell, forming core/shell structure. The core/shell spheres were synthesized by a two-step process. First, magnetic P (St-co-MAA-co-MA) microspheres (MMS) were prepared by microemulsion polymerization of styrene (St), methacrylic acid (MAA) and acryamide (AM) in the presence of magnetic fluid. In the next step, MMS/SiO2 spheres were obtained by addition of tetraethyl orthsilicate (TEOS) to the mixture of MMS, ammonium hydroxide and ethanol. The morphology, structure and properties of the MMS/SiO2 were characterized and the results indicate that the MMS/SiO2 spheres are about 2μm in size with superparamagnetic behavior. The surface of the MMS/SiO2 spheres was functioned with ?COOH successfully. Bioconjugation to IgG was also studied.
Keywords:Sol-gel; microspheres; core/shell structure; application in medicine
 
 
 

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