摘要
采用化学共沉淀法制备纳米Fe3O4,油酸包覆,高锰酸钾氧化,修饰得到羧基功能化的亲水性磁性纳米复合粒子。通过XRD、TEM、傅里叶红外光谱仪等方法对纳米复合粒子的形态、结构及磁性能进行了研究。结果显示:修饰前后的纳米粒子粒径基本无变化,粒径20nm左右。纳米复合粒子的磁性能表现出超顺磁性,矫顽力减小为0,羧基化磁性纳米粒子可在pH=7.4的磷酸缓冲液中形成稳定分散的磁流体。
The magnetic nanoparticles were synthesized by coprecipitation method. Based on the synthesis reac- tion, the magnetic nanoparticies were coated with oleic acid. Subsequently, the magnetic nanopartieles coated with oleic acid were oxidized by KMnO4 solution, thereby hydrophobic magnetic nanoparticles functioned by monolayer car- boxylic groups were obtained. The magnetic nanoparticles were characterized by X-ray diffraction （XRD）, transmis- sion electron microscopy （TEM）, fourier transform infrared （FTIR）. The results show that the average diameter of the carboxyl-functioned magnetic nanoparticles were about 20 nm and there is no difference in diameter with magnetic nanoparticles without carboxyl-function. The remnant magnetization and coercivity of the nanoparticles were nearly to he 0 and the nanoparticles showed classic superparamagnetic. The carboxyl-functioned magnetic nanoparticles could be dispersed into phosphate buffer solution of pH= 7. 4.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2014年第4期42-45,53,共5页
Materials Reports
基金
国家公益性行业(农业)科研专项(201203094)
国家自然科学基金(31201371)
国家国际科技合作专项(2012DFA31140)
关键词
化学共沉淀法
磁性Fe3O4微球
制备
表征
coprecipitation method, magnetic FeaO4 particle, preparation, characterization
