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Preparation of Silica Particles by Emulsion-Gel Process Using Membrane Emulsification  

Yeon, Song-Hee (Department of Industrial Engineering Chemistry, College of Engineering, Chungbuk National University)
Youm, Kyung-Ho (Department of Industrial Engineering Chemistry, College of Engineering, Chungbuk National University)
Publication Information
Membrane Journal / v.20, no.2, 2010 , pp. 87-96 More about this Journal
Abstract
We prepared spherical silica particles by controlling various conditions of emulsion-gel procedure using a lab-scale membrane emulsification system equipped with SPG (Shirasu porous glass) membrane having pore size of 2.6 ${\mu}m$. We determined the effects of process parameters of membrane emulsification (dispersed phase pressure, stabilizer and emulsifier concentration in continuous phase, $H_2O$/TEOS ratio, ratio of dispersed phase to continuous phase) on the mean size and size distribution of silica particles. The increase of the dispersed phase pressure and ratio of dispersed phase to continuous phase led to the increase in the mean size of silica particles. On the contrary, the increase in stabilizer and emulsifier concentration and $H_2O$/TEOS ratio caused the reduction of the mean size of particles. Through controlling these parameters, monodisperse spherical silica particles with about 3 ${\mu}m$ of the mean size were finally prepared.
Keywords
membrane emulsification; emulsion-gel process; silica particle; W/O emulsion; SPG membrane;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
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