摘要
以FeCl3.6H2O、FeSO4.7H2O和NH3.H2O为原料,采用化学共沉淀法制备Fe3O4磁性纳米粒子,用γ-缩水甘油醚氧丙基三甲氧基硅烷(KH-560)对其进行表面修饰,制得有机硅改性的Fe3O4磁性颗粒。通过FTIR、TEM、TGA、VSM等分析手段对其结构和性能进行了研究,分析了反应的最佳条件。结果表明,反应最佳条件为:反应温度60℃,反应时间3 h,硅烷加入量为0.5 mL,pH值为5-6,反应溶剂乙醇与水的体积比为3∶1。并且KH-560修饰后的磁性颗粒在无水乙醇中表现出了良好的分散性,室温下表现出超顺磁性,比饱和磁化强度为42.2 emu.g-1。
With FeCl3·6H2O、FeSO4·7H2Oand NH3·H2O as raw materials and the use of chemical coprecipitation,we prepared Fe3O4 magnetic nanoparticles. Then withγ-glycidoxypropyl trimethoxysilane （KH-560） surface modification of them,we prepared silicone modified Fe3O4 magnetic particles. By the means of FTIR,TEM,TGA, and VSM,we studied their structures, properties,and optimum reaction conditions. The results show that the opti- mum reaction conditions are reaction temperature 60℃, reaction time 3 h, the amount of silane 0.5 mL, pH value 5-6, and the volume ratio of the reaction solvents between ethanol and water 3：1. And the magnetic particles after the KH-560 modification in anhydrous ethanol exhibit good dispersion performance and are superparamagnetie at room temperature. The ratio of the saturation magnetization is 42.2 emu· g^-1.
出处
《苏州科技学院学报（自然科学版）》
CAS
2013年第1期45-49,共5页
Journal of Suzhou University of Science and Technology （Natural Science Edition）
基金
国家自然科学基金资助项目(51103120)
苏州科技学院研究生创新(2011)资助项目(SKCX11S_055)
关键词
磁性纳米粒子
环氧基
表面修饰
magnetic nanoparticles
epoxy group
surface modification
