Synthesis and characterization of amino-silanemodified NdFeB magnetic particles(Chinese)
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摘要: 以3-氨丙基三乙氧基硅烷作为修饰剂，对具有永磁性的NdFeB磁性粒子进行了表面修饰, 使之表面带有活性-NH2基官能团.通过傅立叶红外光谱、差示扫描量热、热重分析、透射电镜以及磁性分析等方法对磁性微粒表面功能团进行表征，证明在选定的实验条件下，达到了理想的表面修饰效果.该法试剂易得，操作简单，结果稳定，可以使氨基化的永磁微粒进行进一步的生物应用.Abstract: In order to be conjuncted with active -NH2 groups, the surface modification of NdFeB permanent magnetic particles by 3-aminopropyltriethoxysilane (APES) was studied in this paper. The surface functional groups of the modified NdFeB magnetic particles were investigated by FT-IR, DSC-TG, TEM and magnetic hysteresis loop measurements, and the experimental results showed that effective amino-silane modified magnetic particles was obtained under the optimum conditions. The methods reported in this paper have some advantages, such as simple reagents, easy operation and stable property. The APES coated NdFeB magnetic particles could be used for further biological researches.
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