Acta Phys. -Chim. Sin. ›› 2003, Vol. 19 ›› Issue (07): 657-660.doi: 10.3866/PKU.WHXB20030719

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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

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