MICROENCAPSULATION OF MONO-DISPERSED DROP LETS BY COMPLEX COACERVATION METHOD AND MEMBRANE THICKNESS OF GENERATED CAPSULES

Mono-dispersed stable kerosine droplets were prepared by a membrane em ulsification method with microporous glass, and their microencapsulati on was carried out by complex coacervation of gelatin and acacia. The effects of acetic acid dosage, cooling rate, addition time of core mat erial in the encapsulation process, heating rate, and dosages of sodiu m hydroxide and formaldehyde in the hardening process on membrane thic kness and the number of cores of generated microcapsules are investiga ted systematically. It is clear that the 30 to 20 degrees C range in t he cooling process is an important temperature range for microencapsul ation of kerosine droplets. Low dosage of acetic acid and low cooling rate reduce the number of core included in the capsule, and the membra ne thickness and the number of cores in the capsule are almost indepen dent of the operating conditions in the hardening process. Further, th e results obtained in the encapsulation of the liquid drop are compare d with the data of solid core microencapsulation.