Synthesis of silica particles in the hydrolysis of tetraethyl orthosilicate with amine catalysts

被引：13

作者：

Nagao, D ^{[1
]}

Mine, E ^{[1
]}

Kobayashi, Y ^{[1
]}

Konno, M ^{[1
]}

机构：

[1] Tohoku Univ, Grad Sch Engn, Dept Chem Engn, Aoba Ku, Sendai, Miyagi 9808579, Japan

来源：

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN | 2004年 / 37卷 / 07期

关键词：

silica particles; monodisperse; amine catalyst; hydrolysis; tetraethyl orthosilicate;

D O I：

10.1252/jcej.37.905

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Methylamine (MA) and dimethylamine (DMA) were examined as catalysts for the hydrolysis of tetraethyl orthosilicate (TEOS) to synthesize monodispersed silica particles. Experimental results were compared with those in ammonia-catalyzed hydrolysis of TEOS. The hydrolysis reactions were carried out at a water concentration of 11 kmol/m(3) in ranges of catalyst concentration (0.01-1.5 kmol/m(3)) and TEOS concentration (0.02-0.2 kmol/m(3)). Spherical particles were formed at catalyst concentrations lower than 1.5 kmol/m(3) for NH3 and lower than 0.2 kmol/m(3) for MA and DMA. Comparison of the coefficient of variation (C-v) for monodisperse spherical particles indicated that silica particles obtained with the amine catalysts were more highly monodisperse than those obtained with NH3 catalyst.

引用

页码：905 / 907

页数：3

共 13 条

[1]

Blaaderen AV, 1992, J COLLOID INTERF SCI, V154, P481, DOI [10.1016/0021-9797(92)90163-G, DOI 10.1016/0021-9797(92)90163-G]

[2] PREPARATION OF MONODISPERSE SILICA PARTICLES - CONTROL OF SIZE AND MASS FRACTION [J].