ケイ酸の水溶液中での初期重合過程 Initial Stage Polymerization of Silicic Acid in Aqueous Solution

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著者

    • 志賀 弘 SIGA Hiroshi
    • 東海大学工学部工業化学科 Department of Industrial Chemistry, School of Engineering, Tokai University
    • 東 保男 AZUMA Yasuo
    • 東海大学工学部工業化学科 Department of Industrial Chemistry, School of Engineering, Tokai University

抄録

The initial stage polymerization of silicic acid in aqueous solution was investigated by using a monosilicic acid solution prepared from hydrolysis of TMOS (Tetra-methyle-silicate).<BR>Results obtained were as follows.<BR>1) The silicic acid concentration in aqueous solution by ion resin method of sodium silicates decreased rapidly.<BR>2) The silicic acid solution prepared from the hydrolysis of TMOS was stable on standing at 25°C. The rate of initial stage polymerization can be applied of the second-order reaction equation. Its initial stage polymerization were distinguished for three step in acid solution, and for two step in alkaline solution. The rate of polymerizationin alkaline solution proceeded greatly than this of in acid solution.<BR>3) The activation energies for polymerization were 26.4 kcal/mol in water, 9.5 kcal/mol in acid solution.<BR>From these results, it was found that the polymerization took place in a different mechanism by acid solution and alkaline solution, and formed <SUP>+</SUP>H<SUB>2</SUB>OSi (OH) <SUB>3</SUB> in acid solution, (HO) <SUB>3</SUB>SiO<SUP>-</SUP> in alkaline solution.

収録刊行物

  • 無機マテリアル : セッコウ・石灰・セメント・地球環境の科学 = Inorganic materials  

    無機マテリアル : セッコウ・石灰・セメント・地球環境の科学 = Inorganic materials 4(268), 223-231, 1997-05 

    The Society of Inorganic Materials, Japan

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各種コード

  • NII論文ID(NAID)
    10002122724
  • NII書誌ID(NCID)
    AN10455831
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    13407899
  • NDL 記事登録ID
    4206213
  • NDL 雑誌分類
    ZP9(科学技術--化学・化学工業--無機化学・無機化学工業--セラミックス・窯業)
  • NDL 請求記号
    Z17-B79
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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