BPO@Ppy微胶囊的制备及其缓释性能的研究

Preparation and characterization of BPO@Ppy microcapsules with controlled release performance

采用悬浮-分散聚合法可成功制备出粒径分布在600~800 nm,包裹率高达83%,能在5~17 h之间可控制缓慢释放的以过氧化苯甲酰(BPO)为芯材,聚吡咯(Ppy)为壳材的微胶囊。所制备出的微胶囊储藏稳定性能较好,通过对微胶囊的释放过程进行动力学模型的构建,其研究结果表明,60°C时微胶囊的缓慢释放过程接近于Higuchi动力学模型。

The microcapsules containing BPO as the core materials,polypyrrole as the shell materials were prepared by suspension-dispersion-polymerization.The encapsulation efficiency of BPO reached peak at 83%in the microcapsules.The controlled slow release time of BPO could be at 5~17 h from the microcapsules.The particle size of samples were 600~800 nm.The microcapsules prepared also have good storage stability.Based on the construction of the kinetic model of the release process of microcapsules.The results showed that the kinetic model of the controlled release was close to the Higuchi kinetic model at 60°C.