研究了pH对复合凝聚薄荷油微胶囊的形态及壁材复合凝聚物性质的影响,揭示了复合凝聚物对微胶囊形态影响的内在原因。结果表明:当pH由4.3降到3.7时,壁材复合凝聚物的组成及产率没有明显变化,复合凝聚球状多核微胶囊粒径的增大主要是由于壁材复合凝聚物间静电排斥力的下降和复合凝聚物凝胶性的增强所致;而当pH低于3.7时,由于大量的明胶分子从壁材复合凝聚物中排斥出,微胶囊形态变得不规则。

Effect of pH on the morphology and the property of microcapsules encapsulating peppermint oil by coacervation as wall material was investigated.The principle of the effect of coacervates on the morphology of microcapsules was illustrated.The results showed that with the decrease of pH from 4.3 to 3.7,the composition and productivity of coacervates rarely changed.So the increase of particle size of spherical multinuclear microcapsules was the result from the decrease of electronic resistant power and the increase of gelling property for coacervates.When pH was blew 3.7,the morphology of microcapsules turned irregular and released plenty of gelatin from coacervate wall material.