CONTROLLED RELEASE OF STYRENE-DIVINYLBENZENE COPOLYMER MICROCAPSULES BY PHASE TRANSFORMATION OF ENCAPSULATED STEARIC ACID
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概要
- 論文の詳細を見る
Functional microcapsules encapsulating stearic acid were prepared by in situ polymerization of styrene and divinylbenzene. Morphology and release rate were investigated by changing preparation conditions.Total monomer concentration was found to be an important determinant of morphology while being a less dominant factor in average diameter of microcapsule. The sustained release of stearic acid was controlled by pore diffusion through porous microcapsule membrane. The permeability was dependent upon total monomer concentration and average diameter of microcapsule. The permeability coefficient increased with an increase of average diameter of microcapsules and decreased with increasing total monomer concentration.The sustained release rate from microcapsules to ambient solution abruptly changed in the vicinity of melting point of stearic acid. This may indicate that functional microcapsules exhibiting temperature-dependent permeability can be prepared.
- 社団法人 化学工学会の論文
- 1994-08-20
著者
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UEMURA Yoshimitsu
Department of Applied Chemistry and Chemical Engineering
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HATATE Yasuo
Department of Applied Chemistry and Chemical Engineering
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吉澤 秀和
岡山大学 環境理工学部 物質環境科学科
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YOSHIZAWA HIDEKAZU
Department of Environmental Chemistry and Materials, Faculty of Environmental Science and Technology
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IJICHI Kazuya
Department of Applied Chemistry and Chemical Engineering, Kagoshima University
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Ijichi K
Department Of Applied Chemistry And Chemical Engineering Kagoshima University
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Ijichi Kazuya
Department Of Applied Chemistry And Chemical Engineering Kagoshima University
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Yoshizawa Hidekazu
Department Of Environmental Chemistry And Materials Okayama University
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KASAMATU Koji
Department of Applied Chemistry and Chemical Engineering, Kagoshima University
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KAWANO Toshinobu
Department of Materials Science, Miyazaki University
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Kasamatu Koji
Department Of Applied Chemistry And Chemical Engineering Kagoshima University
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Kawano Toshinobu
Department Of Materials Science Miyazaki University
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Yoshizawa Hidekazu
Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering, Kagoshima University
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