Biocompatible microcapsules with a water core templated from single emulsions

We use single emulsions as templates to fabricate monodisperse biocompatible microcapsules with a water core. These microcapsules are fabricated using FDA-approved polymer and non-toxic solvents and are of great use in drugs, cosmetics and foods.     

Encapsulation,protection, and release of hydrophilic active components: Potential and limitations of colloidal delivery systems

There have been major advances in the development of edible colloidal delivery systems for hydrophobic bioactives in recent years. However, there are still many challenges associated with the development of effective delivery systems for hydrophilic bioactives. This review highlights the major challenges associated with developing colloidal delivery systems for hydrophilic bioactive components that can be utilized in foods, pharmaceuticals, and other products intended for oral ingestion. Special emphasis is given to the fundamental physicochemical phenomena associated with encapsulation, stabilization, and release of these bioactive components, such as solubility, partitioning, barriers, and mass transport processes. Delivery systems suitable for encapsulating hydrophilic bioactive components are then reviewed, including liposomes, multiple emulsions, solid fat particles, multiple emulsions, biopolymer particles, cubosomes, and biologically-derived systems. The advantages and limitations of each of these delivery systems are highlighted. This information should facilitate the rational selection of the most appropriate colloidal delivery systems for particular applications in the food and other industries.     

多孔聚合物载药微球活性组分释放机理及模型

为研究多孔载药微球中活性物的释放机理及控释性能,以难溶性Parsol 1789为模型药物,结合扩散的连续性方程和溶解理论,建立了此类药物从多孔聚合物微球载体中释放的溶解-扩散模型,并利用数值求解得到不同时刻活性物累积释放量的模型方程。用溶解度不同的活性物释放数据对方程进行拟合并求得各组分在多孔聚合物基质中的有效扩散系数和溶解速率常数。结果表明:不同的制备条件和组成对扩散系数有重要影响,而溶解速率常数主要由活性物性质决定。