Control of Particle Morphology from Porous to Hollow by Spray-Drying with a Two-Fluid Nozzle and Template Materials

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  • Ogi Takashi
    Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University
  • Iskandar Ferry
    Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University
  • Yabuki Akihiro
    Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University
  • Okuyama Kikuo
    Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University

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  • テンプレート材料を用いた二流体ノズル噴霧乾燥法による多孔質から中空粒子への形態制御
  • テンプレート ザイリョウ オ モチイタ 2リュウタイ ノズル フンム カンソウホウ ニ ヨル タコウシツ カラ チュウクウ リュウシ エノ ケイタイ セイギョ

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Abstract

Spray-drying with a two-fluid nozzle was used to produce composite particles consisting of silica or titania nanocolloids and template particles (polystyrene latex: PSL). Template particles were then removed from the composite particles by heating or washing with organic solvent to yield respectively porous SiO2</sup> and TiO2 particles. The average size and standard deviation of particles prepared by spray-drying with the two-fluid nozzle were 1.31 μm and 1.59 respectively. When the size of template particles was varied in the rage of 100–400 nm, porous particles were synthesized with template particles of 200 nm or smaller, while hollow particles were obtained with template particles of 300 nm or larger. In addition, polyethylene glycol (PEG) porous particles could be obtained by the same method.

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