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Microencapsulation of Mono-Dispersed Droplets Prepared by SPG Membrane Emulsification and Generation Mechanism of Its Coating Layer

SPG膜乳化制备单分散液滴的微胶囊化及其包衣层的生成机制

基本信息

批准号：
09650835
负责人：
MATSUNO Yoshizo
金额：
$ 2.18万
依托单位：
KYUSHU INSTITUTE OF TECHNOLOGY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09650835/
关键词：
Microcapsule Gelatin Acacia Coacervation Kerosine Microporous glass Emulsion In situ polymerization 膜乳化

项目摘要

Microencapsulation of mono-dispersed stable kerosine droplets was carried out by complex coacervation of gelatin and acacia and following results were drawn :1. Mono-dispersed kerosine droplets were prepared using a porous glass membrane (SPG) with narrow pore distribution. We succeeded in excluding the complicated influence of emulsification of core material on microencapsulation and in investigating the effect of operating conditions of the encapsulation process on capsule morphology separately by the use of mono-dispersed droplets as the core material.2. The drop size distribution and stability of the kerosine emulsion prepared by membrane emulsification were measured.3. The effects of acetic acid dosage, cooling rate, addition time of core material in the encapsulation process on membrane thickness and the number of cores of generated microcapsules were investigated.4. The effects of heating rate and dosages of sodium hydroxide and formaldehyde in the hardening process on membrane thickness and the number cores were also investigated.5.30 to 20ﾟC in the cooling process was an important temperature range for microencapsulation by coacervation method of gelatin and acacia.6. The results obtained in the encapsulation of the liquid drop were compared with the data of solid core microencapsulation.7. Further, microencapsulation of solid core by in situ polymerization was carried out and the effects of operating conditions on capsule morphology and membrane thickness were investigated.

采用明胶-阿拉伯胶复凝聚法对单分散稳定煤油液滴进行微胶囊化，得到以下结果：1。采用窄孔径分布的多孔玻璃膜（SPG）制备了单分散煤油液滴。成功地排除了芯材乳化对微胶囊化的复杂影响，并以单分散液滴为芯材，分别考察了微胶囊化过程中操作条件对胶囊形态的影响.测定了膜乳化法制备的煤油乳液的粒径分布和稳定性.考察了包封过程中醋酸用量、降温速率、芯材加入时间对微胶囊膜厚度和芯数的影响.研究了固化过程中加热速率、氢氧化钠和甲醛用量对膜厚度和芯数的影响，并确定了冷却过程中5.30 ~ 20 ℃是明胶-相思树胶凝聚法制备微胶囊的重要温度范围.将液滴包封的结果与固体芯微胶囊化的数据进行了比较.进一步采用原位聚合法对固体核进行微胶囊化，考察了操作条件对胶囊形态和膜厚度的影响。