A method for production of fine microcapsules which encapsulate a hydrophilic bioactive substance at a high content and can be used in wide range of applications such as foods and medical drugs, which method enabling efficient industrial production, is provided. A method for production of S/O type microcapsules including the steps of: (1) emulsifying and dispersing a mixture of a solid fat and an aqueous solution containing a hydrophilic bioactive substance at a temperature of at least the melting point of the solid fat to obtain a W/O emulsion; (2) removing moisture in the W/O emulsion at a temperature of at least the melting point and lower than the boiling point of the solid fat to obtain an S/O suspension; (3) adding the S/O suspension into an aqueous phase containing at least one selected from a surfactant (B), a thickening agent and a hydrophilic organic solvent, and permitting liquid droplet dispersion at a temperature of at least the melting point and lower than the boiling point of the solid fat to obtain an S/O/W emulsion; and (4) cooling the S/O/W emulsion to lower than the melting point of the solid fat to harden the solid fat, and further removing the moisture at a temperature lower than the melting point of the solid fat.
本发明提供了一种生产精细微胶囊的方法,这种微胶囊能高含量地封装亲
水性
生物活性物质,可广泛应用于食品和医疗药品等领域,该方法可实现高效的工业化生产。生产 S/O 型微胶囊的方法包括以下步骤:(1) 在至少为固体脂肪熔点的温度下,乳化和分散固体脂肪和含有亲
水性
生物活性物质的
水溶液的混合物,得到 W/O 型乳液;(2) 在至少为固体脂肪熔点且低于其沸点的温度下,除去 W/O 型乳液中的
水分,得到 S/O 型悬浮液;(3) 将 S/O 悬浮液加入含有至少一种选自表面活性剂 (B)、
增稠剂和亲
水性有机溶剂的
水相中,并允许液滴在至少熔点且低于固体脂肪沸点的温度下分散,得到 S/O/W 乳液;以及 (4) 将 S/O/W 乳液冷却至低于固体脂肪熔点,使固体脂肪变硬,并在低于固体脂肪熔点的温度下进一步去除
水分。