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新型氨基化磁性纳米粒子的合成 被引量:1

Synthesis of a newly aminated magnetic nanoparticles
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摘要 通过嫁接方法在包有二氧化硅的纳米CoFe2O4磁粒表面进行氨基化修饰,制备出一种可用于生物医学领域的新型氨基化纳米磁粒,采用TGA-DTA,IR,VSM和Zeta-potential等测定方法,对氨基化和未氨基化的CoFe2O4纳米粒子进行了表征。元素分析结果显示,有0.98 mmol/g的有机分子固定在纳米粒子表面;红外和热分析数据显示,带氨基的有机分子嫁接到磁粒表面的二氧化硅壳层上;Zeta电位数据也显示,带氨基的有机分子嫁接到纳米磁粒表面;样品的磁性参数显示,氨基化纳米磁粒仍具有好的磁学性能。 Synthesis of a kind of newly aminated CoFe2O4 nanoparticles by grafting process for biomedical applications,which were coated primarily with silicon dioxide( SiO2 ). The aminated SiO2/CoFe2O4 (ASCN) and SiO2-coated CoFe2O4(SCN) nanoparticles were investigated by elemental analysis,TGA-DTA, IR,Zeta-potential measurement and VSM. Based on IR and TGA results,it was suggested that the surface of the SiO2-coated CoFe2O4 nanoparticles were grafted with amino compounds. The elemental analysis also showed that 0.98 mmol/g of organic moieties immobilized on the surface of ASCN nanoparticles. Zeta-potential data of ASCN nanoparticles also revealed that amino compounds was bonded onto the surface of SiO2-coated CoFe2O4 nanoparticles by ether linkage. The magnetic parameters showed that ASCN nanoparticles still had good magnetic behavior.
出处 《应用化工》 CAS CSCD 2007年第7期641-643,655,共4页 Applied Chemical Industry
基金 国家自然科学基金项目(30671846)
关键词 纳米磁性 铁酸钴 氨基化 嫁接 表面修饰 ZETA电位 nano magnetic cobalt ferrites aminated grafted surface modification Zeta potential
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