| 超声乳化法制备纳米Fe3O4磁性颗粒及壳聚糖表面改性 |
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| 引用本文： | 季业,邵慧萍,郭志猛,林涛,杨栋华.超声乳化法制备纳米Fe3O4磁性颗粒及壳聚糖表面改性[J].北京科技大学学报,2011,33(6):751-755. |
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| 作者姓名： | 季业 邵慧萍 郭志猛 林涛 杨栋华 |
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| 作者单位： | 北京科技大学新材料技术研究院,北京,100083 |
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| 基金项目： | 教育部留学回国人员科研启动基金资助项目 |
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| 摘 要： | 采用超声乳化法制备纳米Fe3O4磁性颗粒,以壳聚糖作为表面活性剂,制备具有生物亲和性的水基Fe3O4磁流体.研究了Fe2+/Fe3+摩尔比、超声时间和表面活性剂用量对磁流体性能的影响.结果表明:当Fe2+/Fe3+摩尔比为1:1·5,滴加氨水时反应温度为70℃时,可制备理想纳米Fe3O4磁性颗粒;超声时间为7·5min左右,质量分数1%的壳聚糖溶液体积占FeO溶液总体积的50%时,有利于壳聚糖分子的包覆,使磁流体具有较高的比饱和磁化强度及稳定性.
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| 关 键 词： | 纳米颗粒 磁性材料 铁氧化物 磁流体 壳聚糖 乳化 |
Preparation of Fe_3O_4 magnetic nanoparticles by ultrasonic emulsification and research of magnetic fluids with chitosan modification |
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| JI Ye,SHAO Hui-ping,GUO Zhi-meng,LIN Tao,YANG Dong-hua.Preparation of Fe_3O_4 magnetic nanoparticles by ultrasonic emulsification and research of magnetic fluids with chitosan modification[J].Journal of University of Science and Technology Beijing,2011,33(6):751-755. |
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| Authors: | JI Ye SHAO Hui-ping GUO Zhi-meng LIN Tao YANG Dong-hua |
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| Institution: | JI Ye,SHAO Hui-ping Wingdingsj,GUO Zhi-meng,LIN Tao,YANG Dong-hua School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China |
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| Abstract: | Fe3O4 magnetic nanoparticles were prepared by means of ultrasonic emulsification and then the Fe3O4 magnetic fluid was made by dispersing these particles into water with chitosan as surfactants.The influences of the molar ratio of Fe2+ to Fe3+,ultrasonic time and the amount of chitosan on the magnetic properties of the magnetic fluid were investigated.The results show that ideal Fe3O4 magnetic nanoparticles can be obtained under the condition that the molar ratio of Fe2+ to Fe3+ is 1:1.5 and the reaction te... |
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| Keywords: | nanoparticles magnetic materials iron oxides magnetic fluids chitosan emulsification |
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