JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
Print ISSN : 0021-9592
Materials and Devices
Preparation of Cross-Linked Microcapsules Entrapping Inorganic Salt by In-situ Polymerization in (W/O/W) Emulsion System
SHIRO KIYOYAMAHIROMITSU UENOKOICHIRO SHIOMORIYOSHINOBU KAWANOYASUO HATATE
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2001 Volume 34 Issue 1 Pages 36-42

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Abstract

Cross-linked microcapsules entrapping ascorbic acid magnesium salt as a core material are prepared by in-situ copolymerization of styrene and divinylbenzene in a (W/O/W) emulsion system. The effects of the preparation conditions of the microcapsules on the capsule morphologies, the entrapment efficiency and release profiles of the core material are investigated. The entrapment efficiency of the core material is improved by lowering the volume fraction of the dispersion phase in the (W/O) emulsion and adding the salt to the outer aqueous phase when tricalcium phosphate is used as the dispersion stabilizer. Both the entrapment efficiency of the core material and the internal morphologies of the microcapsules affect the release profiles of the core material.

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© 2001 The Society of Chemical Engineers, Japan
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