1998 Fiscal Year Final Research Report Summary
Microencapsulation of Mono-Dispersed Droplets Prepared by SPG Membrane Emulsification and Generation Mechanism of Its Coating Layer
| Project/Area Number |
09650835
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
化学工学一般
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| Research Institution | KYUSHU INSTITUTE OF TECHNOLOGY |
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Principal Investigator |
MATSUNO Yoshizo Kyushu Institute of Technology, Faculty of Engineering, Professor, 工学部, 教授 (20039093)
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| Co-Investigator(Kenkyū-buntansha) |
KAGE Hiroyuki Kyushu Institute of Technology, Faculty of Engineering, Associate Professor, 工学部, 助教授 (80142355)
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| Project Period (FY) |
1997 – 1998
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| Keywords | Microcapsule / Gelatin / Acacia / Coacervation / Kerosine / Microporous glass / Emulsion / In situ polymerization |
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| Research Abstract |
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.
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