In order to lengthen the release time of microcapsules with a particle diameter of 20-74μm and an inorganic porous shell, an attempt was made to coat them individually with ethyl cellulose film by applying a phenomenon in which single particles break out of droplets, observed in spray drying of suspensions. As a result, two types of microcapsules covered with ethyl cellulose, having monocore or multicore, were obtained. For the monocore microcapsules, the release time of magnesium hydroxide carbonate from the interior increased with the decrease in the pore size of the inorganic porous shell of core particles and with the increase in the concentration of ethyl cellulose in the 2-propanol, where core particles were dispersed. Multicore microcapsules released magnesium hydroxide carbonate for a longer time than monocore microcapsules.
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