Structure of Spherical Porous Silica Particles Derived from Tetramethoxysilane and Methyltrimethoxysilane

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  • YAMASHITA Hiroshi
    Department of Applied Chemistry, Faculty of Engineering, Ehime University
  • TANIGUCHI Tomohiro
    Department of Applied Chemistry, Faculty of Engineering, Ehime University
  • TANAKA Kanako
    Department of Applied Chemistry, Faculty of Engineering, Ehime University
  • MAEKAWA Takashi
    Department of Applied Chemistry, Faculty of Engineering, Ehime University

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  • ケイ酸メチルとメチルトリメトキシシランから合成した球状多孔質シリカの構造
  • ケイサン メチル ト メチルトリメトキシシラン カラ ゴウセイシタ キュウジョ

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Abstract

Spherical porous silica particles were synthesized by the sol-gel process from tetramethoxysilane and methyltrimethoxysilane in W/O emulsion. The difference in structure change by calcination is remarkable between air and nitrogen atmospheres. By calcination of the particles under N2 gas atmosphere their pore structures can be maintained up to 1000°C. This is due to the fact that Si-CH3 bond remains at high temperature. The 29Si MAS NMR spectra revealed that the intensity of T3 structural unit, whose origin is Si-C bonding, increased with an increase in methyltrimethoxysilane in a starting solution.

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