核壳结构柠檬酸改性纳米磁性颗粒的特性研究  

Core-shell Structure and Magnetic Properties of Magnetic Nanoparticles Modified by Citric Acid

作　　者：张伟[1] 沈辉[1] 谢民强[2] 朱燕娟[3] 胡孙林[1] 邓颖宇[3] 黎宪静[1] 

机构地区：[1]中山大学太阳能系统研究所,广东广州510275 [2]中山大学附属第三医院,广东广州510630 [3]广东工业大学物理与光电工程学院,广东广州510006

出　　处：《中山大学学报（自然科学版）》2008年第2期58-61,共4页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金资助项目(30672297);广东省自然科学基金资助项目(07300540)

摘　　要：采用了两步法制备柠檬酸改性纳米Fe3O4磁性颗粒。对样品进行了傅立叶红外光谱(FTIR)、Zeta电位分析、透射电镜(TEM)、热重分析(TG)和磁化曲线测定等表征分析,并对柠檬酸吸附特性进行了研究。所得柠檬酸改性Fe3O4纳米颗粒粒径约为30 nm,磁性颗粒饱和磁化强度可达38.9 emμ/g,可用于药物载体研究。A magnetic nanoparticles modified with citric acid was prepared by means of the two-steps co-precipitation method. The absorption properties of samples were investigated by TEM, FTIR, TG, zeta potential and vibration magnetometer. The average grain size of citric-acid-modified magnetite cores is about 30 nm and the saturation magnetization is 38.9emμ/g, respectively. The result shows that the maghetic nanoparticle can be used as a medical carrier of biomedical.

关 键 词：纳米颗粒 表面改性 吸附 

分 类 号：TQ586.1[化学工程—精细化工]