Monodisperse silica particles,Tetraethyl orthosilicate,Tetraethyl orthosilicate hydrolysis,"/> 单分散SiO<sub>2</sub>体系制备中TEOS水解动力学研究

物理化学学报 >> 1995, Vol. 11 >> Issue (07): 612-616.doi: 10.3866/PKU.WHXB19950709

研究论文 上一篇    下一篇

单分散SiO2体系制备中TEOS水解动力学研究

赵瑞玉,董鹏,梁文杰   

  1. 石油大学炼制系|山东东营市 257062
  • 收稿日期:1994-06-29 修回日期:1994-10-10 发布日期:1995-07-15
  • 通讯作者: 赵瑞玉

Study of the Hydrolysis Kinetics of Tetraethyl Orthosilicate in the Preparation of Monodisperse Silica System

Zhao Rui-Yu,Dong Peng,Liang Wen-Jie   

  1. University of Petrolum,Shandong Dongying 257062
  • Received:1994-06-29 Revised:1994-10-10 Published:1995-07-15
  • Contact: Zhao Rui-Yu

摘要:

采用一种与他人不同的萃取-冷冻分离-气相色谱法,跟踪形成单分散二氧化硅体系条件下正硅酯乙酯(TEOS)的水解过程,考察了温度(25~45℃)、氨浓度(0.5~0.2mol•L-1)、水浓度(6.0~15.0mol•L-1)等实验条件范围内,以上实验参数对TEOS水解速度的影响;并回归得到目前适用于在乙醇介质中氨催化下,形成单分散二氧化硅微粒常用实验条件范围内,唯一的较完整的水解动力学方程式.

关键词: 单分散二氧化硅微粒, 正硅酸乙酯, 正硅酸乙酯水解动力学

Abstract:

The hydrolysis of tetraethyl orthosilicate in the preparation of monodisperse silica particles was studied by means of extract-freeze separate-GC analysis. The effect of the parameters on the hydrolysis rate was investigated in the temperature range: 25-45℃; ammonina concentration: 0.5-0.2mol•L-1; water concentration: 6.0-15.0mol•L-1.A kinetics eqution of hydrolysis was obtained by the which could be used under experimental conditions most in use in the preparation of monodisperse particles in ethanol with ammonina as catalyst.

Key words: Monodisperse silica particles')">

Monodisperse silica particles, Tetraethyl orthosilicate, Tetraethyl orthosilicate hydrolysis