Polyaniline/Silica Hybrid Gels Prepared by Catalytic Polymerization Using Copper (II) Salts

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  • KODAMA Eri
    Department of Applied Material and Life Science, College of Engineering, Kanto Gakuin University
  • ONODERA Motomi
    Department of Applied Material and Life Science, College of Engineering, Kanto Gakuin University
  • HARIMA Hideaki
    Department of Applied Material and Life Science, College of Engineering, Kanto Gakuin University
  • UCHIDA Yoshikuni
    Department of Applied Material and Life Science, College of Engineering, Kanto Gakuin University
  • MATSUI Kazunori
    Department of Applied Material and Life Science, College of Engineering, Kanto Gakuin University

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Other Title
  • Ｃｕ｀２＋´触媒を用いたポリアニリン‐シリカ複合ゲルの作製
  • Cu²⁺触媒を用いたポリアニリン―シリカ複合ゲルの作製
  • Cu ² ⁺ ショクバイ オ モチイタ ポリアニリン ― シリカ フクゴウ ゲル ノ サクセイ

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Abstract

Catalytic polymerization of aniline was carried out in sol-gel silicas doped with aniline and copper(II) salts as a catalyst in order to prepare polyaniline/silica hybrid gels. Aqueous solutions of aniline, sodium dodecyl sulfate, HCl, Cu(II) salts and tetraethoxysilane were mixed and stirred at room temperature. The obtained gels showed a deep green color during the drying process and had absorption peaks at ∼422 nm and ∼750 nm, thus indicating the formation of emeraldine salts type polyaniline in the sol-gel silicas. As for the formation of polyaniline, CuCl2 was twice as active as CuSO4 or Cu(NO3)2. It was confirmed that polymerization of polyaniline proceeds by utilizing copper(II) salts as a catalyst and oxygen as an oxidant in the sol-gel silica gels.

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