物理化学学报 >> 2003, Vol. 19 >> Issue (07): 657-660.doi: 10.3866/PKU.WHXB20030719

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聚苯胺颗粒材料的表面改性

魏建红;石兢;官建国;袁润章   

  1. 1武汉大学物理科学与技术学院,武汉　430072; 2武汉理工大学材料复合新技术国家重点实验室,武汉　430070
  • 收稿日期:2002-11-11 修回日期:2003-02-25 发布日期:2003-07-15
  • 通讯作者: 石兢 E-mail:jshi@whu.edu.cn

Surface Modification of PAn Particles

Wei Jian-Hong;Shi Jing;Guan Jian-Guo;Yuan Run-Zhang   

  1. Department of Physics, Wuhan University, Wuhan　430072; 2State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan　430070
  • Received:2002-11-11 Revised:2003-02-25 Published:2003-07-15
  • Contact: Shi Jing E-mail:jshi@whu.edu.cn

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摘要： 用改性的溶胶-凝胶法制备了表面包覆有一定厚度的钛酸钡薄膜的聚苯胺,通过TEM和FT-IR分析方法研究了其形貌及微结构,并探讨了改性聚苯胺材料的电流变性能.FT-IR研究结果表明,在聚苯胺与钛酸钡之间存在着N－O间的氢键作用.TEM研究结果表明,改性聚苯胺粒子的直径在1.0～1.5 μm之间.此外,包覆工艺显著改善了材料的介电性能和电流变性能,为制备出高性能的电流变材料提供了一条可行的途径,值得进一步研究.

关键词: 表面包覆, 聚苯胺, 钛酸钡, 电流变性能, 介电性能

Abstract: By using modified sol-gel method, BaTiO3 nano-films were coated on the surface of polyaniline particles. The structure and morphology of coated powders were characterized by TEM and FT-IR, the electrorheological effects were also investigated. The infrared spectrogram shows that there is N－O hydrogen-bond forming between PAn and BaTiO3 in coated particle. TEM results show that the diameters of the coated particles are 1.0～1.5 μm.In addition, the dielectric properties and electrorheological effects are improved greatly by the coating process. It has provided us a new method for the preparation of excellent ER materials and further studies should be continued.

Key words: Surface coating, PAn, BaTiO3, Electrorheological effects, 　Dielectric properties