ケイ酸塩のケイ酸重合形態(第2報)SiO_2-Al_2O_3系ゲル中の重合ケイ酸の形態分布について

概要

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The polymeric forms of silicic acid in various aluminosilicate gels was investigated by the trimethylsilylation method. Aluminum silicate consists mainly of insoluble polysilicic acids. It also contains some anions, such as SiO_4^<4->, oligosilicic acids, and soluble polysilicic acids. On the other hand the aluminosilicate contains mainly anions, such as SiO_4^<4->, Si_2O_7^<6->, Si_3O_<10>^<8->, Si_4O_<12>^<8->, and soluble polysilicic acids. It also contains some insoluble polysilicic acids. The molecular distribution of silicic acids in the aluminosilicate was the same as that of the original sodium silicate used in the synthesis. Soluble polysilicic acids were estimated to have a network molecular structure having a molecular formula of Si_<2n>O_<5n+2>^<2 (n+2)->. The average degree of polymerization, 2n, was estimated to be 8.62-15.67.
公益社団法人日本薬学会の論文
1978-11-25