한국결정성장학회:학술대회논문집 (Proceedings of the Korea Association of Crystal Growth Conference)

한국결정성장학회 (The Korea Association of Crystal Growth)
권호 표지

Preparation of composite particles by Rapid Expansion of Supercritical fluid Solutions and Release behavior

  • Ryu, Han-Won (Department of Materials Science and Engineering, Kangwon National University) ;
  • Kim, Jung-Hwan (Department of Materials Science and Engineering, Kangwon National University) ;
  • Kim, Young-Do (Department of Materials Science and Engineering, Kangwon National University) ;
  • Shin, Kun-Chul (Department of Materials Science and Engineering, Kangwon National University)
  • 발행 : 1998.09.01
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초록

The Rapid Expansion of supercritical fluid Solutions (RESS) process was applied to particles coating. Experiments were conducted in a fluidized bed with an internal nozzle in the center of the reaction tube. Microcapsules (mean particle size : 49$\mu\textrm{m}$) prepared by spray drying method were used as the core particles. Supercritical CO2 solutions of paraffin were expanded through the nozzle in to the bed that was fluidized by air. Surface morphology prepared particles was observed by SEM. For the inspection of particle size change, particle size distributions were measured before and after coating. The releasing behavior of Mg2+ ions inspected by AA.

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