Control of Particle Size and Pore Volume of Silica Microsphere

DOI Web Site 5 Citations 3 References

Bibliographic Information

Other Title
  • シリカ球形微粒子の粒子径・細孔量の制御
  • シリカ キュウケイ ビリュウシ ノ リュウシケイ サイコウリョウ ノ セイギョ

Search this article

Abstract

Porous microsphere of silica was prepared by an interfacial reaction method, in which silica particle was formed by the reaction of aqueous solution of sodium silicate emulsified in benzene solution of surfactants with aqueous solution of ammonium sulfate. In addition, preparation conditions for controlling the particle size and pore volume of silica microsphere were studied.<BR>The particles were prepared under the following constant conditions : concentration of SiO2 and (NH4) 2SO4 were respectively 4.0 mol/l and 1.5 mol/l, surfactant was mixture of Tween-80 and Span-60 in concentration of 21g/l. The W/O ratio was varied from 1/3 to 1/5, and SiO2/Na2O ratio in sodium silicate solution was the range of 1-3, for examining the influence of the W/O ratio and the concentration of SiO2 on particle size and pore volume of the silica microspheres. Properties of particles were determined by the scanning electron microscopic method, particle size distribution, specific surface area, and pore size distribution.<BR>It was found that the particle size was dependent on the W/O ratio in emulsion, and that the specific surface area, the pore volume and the heat of immersion were decreased with increasing SiO2/Na2O ratio in sodium silicate solution.<BR>These results suggest that the pore on the silica microsphere was formed by release of Na2O molecules from the droplet of sodium silicate solution of emulsion in the interfacial reaction.

Journal

Citations (5)*help

See more

References(3)*help

See more

Details 詳細情報について

Report a problem

Back to top