シリコンアルコキシドの加水分解・縮合速度と粒子の成長機構

• 徳井 歳已

  大阪市立大学工学部 応用化学科

• 矢野 元威

  大阪市立大学工学部 応用化学科

• 朝見 賢二

  大阪市立大学工学部 応用化学科

書誌事項

タイトル別名

• Kinetics of Particle Growth in Hydrolysis and Condensation of Silicon Alkoxide.
• シリコン アルコキシド ノ カスイ ブンカイ シュクゴウ ソクド ト リュウシ

抄録

Formation of silica gel through hydrolysis and successive condensation of tetraethoxysilane (TEOS) is studied in the presence of NH₃ as a basic hydrolysis catalyst. The rate of hydrolysis of TEOS was determined by gas chromatography. Dependence of the hydrolysis rate on the initial composition of the reaction mixture is examined in detail; the rate showed first order kinetics for TEOS concentration, and the apparent reaction orders with respect to NH₃, and H₂O are estimated as 1.1, and 1.4, respectively. The particle diameter and numeric concentration of silica gel formed was measured by the dynamic light scattering method. A very narrow distribution of the particle diameter was observed during the growth, showing the formation of monodispersed silica particles. Simulation of the rate of particle growth using the kinetic data above reveals that the hydrolysis of TEOS is the rate determining step. Calculated values of numeric concentration of the particles are in good agreement with experimental values.

収録刊行物

• 化学工学論文集

  化学工学論文集 24 (5), 784-790, 1998

  公益社団法人 化学工学会

キーワード

• kinetics
• particle growth
• silica gel
• hydrolysis
• condensation
• tetraethoxysilane
• dynamic light scattering

詳細情報

• CRID: 1390282679485588096
• NII論文ID: 10002836034
• NII書誌ID: AN00037234
• DOI: 10.1252/kakoronbunshu.24.784
• ISSN: 13499203
• ISSN: 0386216X
• NDL書誌ID: 4562913
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4562913
• Web Site: http://www.jstage.jst.go.jp/article/kakoronbunshu1975/24/5/24_5_784/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可