Sanhueza Leyla, García Paula, Giménez Begoña, Benito José Manuel, Matos María, Gutiérrez Gemma
Departamento de Ciencia de los Alimentos y Tecnología Química, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago 8380000, Chile.
Departamento de Nutrición, Facultad de Medicina, Universidad de Chile, Santiago 8380453, Chile.
Foods. 2022 Jan 24;11(3):310. doi: 10.3390/foods11030310.
Pomegranate peel is an agro-industrial waste that can be used as source of punicalagin, a polyphenolic compound with several beneficial effects on health. Since, once extracted, punicalagin is prone to degradation, its encapsulation by double emulsions can be an alternative to protect the active compound and control its release. The aim of this investigation was to evaluate the feasibility of encapsulating pomegranate peel extract (PPE) in double emulsions using different types of oils (castor, soybean, sunflower, Miglyol and orange) in a ratio of 70:30 (oil:PPE) and emulsification methods (direct membrane emulsification and mechanical agitation), using polyglycerol polyricinoleate (PGPR) and Tween 80 as lipophilic and hydrophilic emulsifiers, respectively. Direct membrane emulsification (DME) led to more stable emulsions during storage. Droplet size, span values, morphology and encapsulation efficiency (EE) were better for double emulsions (DEs) prepared by DME than for mechanical agitation (MA). DEs formulated using Miglyol or sunflower oil as the oily phase could be considered as suitable food grade systems to encapsulate punicalagin with concentrations up to 11,000 mg/L of PPE.
石榴皮是一种农业工业废弃物，可作为石榴皮苷的来源，石榴皮苷是一种对健康有多种有益作用的多酚化合物。由于石榴皮苷一旦提取出来就容易降解，因此通过双重乳液对其进行包封可能是保护活性化合物并控制其释放的一种替代方法。本研究的目的是评估使用不同类型的油（蓖麻油、大豆油、向日葵油、Miglyol和橙油）以70:30（油：石榴皮提取物）的比例以及乳化方法（直接膜乳化和机械搅拌），分别使用聚甘油聚蓖麻醇酸酯（PGPR）和吐温80作为亲脂性和亲水性乳化剂，将石榴皮提取物（PPE）包封在双重乳液中的可行性。直接膜乳化（DME）在储存过程中产生的乳液更稳定。通过DME制备的双重乳液（DEs）的液滴尺寸、跨度值、形态和包封效率（EE）比机械搅拌（MA）更好。使用Miglyol或向日葵油作为油相配制的DEs可被视为适合的食品级体系，用于包封浓度高达11,000 mg/L PPE的石榴皮苷。
