PROCESS FOR PRODUCING MICROCAPSULE

摘要

A polyelectrolyte solution is supplied as a dispersed phase to one of chambers separated by a plate having many fine holes (microchannels) and a continuous phase is supplied to the other chamber. A pressure is applied to the dispersed phase to prepare an emulsion. This emulsion is demulsified, and the dispersed phase is brought into contact with a polyelectrolyte solution or polyvalent-ion solution which has been charged oppositely to the dispersed phase. A gel is thus formed on the periphery of the spherical dispersed phase by a reaction of the polyelectrolyte. Thus, capsules of a two-layer structure are obtained in which the shell is an insoluble gel and the inner part is a polyelectrolyte solution containing cells, etc.