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