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化学学报
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化学学报 ›› 2008, Vol. 66 ›› Issue (2): 251-256. 上一篇    下一篇

研究论文

聚丙烯酸酯-LiNi铁氧体纳米复合物的制备和磁性研究

徐烽1，蒋静2，李良超*,1，王育萍1   

  1. (1浙江师范大学物理化学研究所 化学系 金华 321004)
    (2西华师范大学化学化工学院 南充 637002)
  • 投稿日期:2007-03-13 修回日期:2007-07-18 发布日期:2008-01-28
  • 通讯作者: 李良超

Preparation and Magnetic Properties of Polyacrylate-LiNi Ferrite Nanocomposites

XU Feng1 JIANG Jing2 LI Liang-Chao*,1 WANG Yu-Ping1   

  1. (1 Department of Chemistry, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004)
    (2 College of Chemistry and Chemical Engineering, China West Normal University, Nanchong 637002)
  • Received:2007-03-13 Revised:2007-07-18 Published:2008-01-28
  • Contact: LI Liang-Chao

PDF

692

被引次数

7

用流变相法制备了LiNi铁氧体纳米粒子, 通过硅烷偶联剂对纳米LiNi铁氧体表面改性, 用乳液聚合法制备了纳米LiNi铁氧体-聚丙烯酸酯复合物. 用X射线衍射(XRD)、红外光谱(IR)、透射电镜(TEM)、热重分析(TGA)、振动样品磁强计(VSM)以及阻抗-材料分析仪等表征了样品的结构、形貌和磁性能. 结果表明, 引入的纳米铁氧体被聚丙烯酸酯分子链所包覆, 明显提高了复合物的热稳定性. 在外加磁场下, 复合物表现出了较弱的亚铁磁性, 并具有一定的磁滞损耗特性.

关键词: 聚丙烯酸酯, LiNi铁氧体, 乳液聚合, 磁性

LiNi ferrite nano-particles obtained by the rheological phase reaction were modified by the coupling agent and polyacrylate-LiNi ferrite nanocomposites were synthesized by emulsion polymerization. The structure, morphologies and magnetic properties of the nanocomposites were characterized by X-ray diffraction, infrared spectrometry, transmission electron microscopy, thermogravimetric analysis, vibrating sample magnetometry and impedance/material analysis. The results indicated that the nano-sized ferrite particles were embedded into the polyacrylate matrix, which improved the thermal stability of the composites. The nanocomposite exhibited the hysteresis loops of the ferrimagnetic nature under an applied magnetic field and had the hysteresis loss properties.

Key words: polyacrylate, LiNi ferrite, emulsion polymerization, magnetic property