In this study, spouted bed technology was applied to the protection and functionalization of polyphenolic rosemary extracts. First, solid–liquid extraction was performed at 25 °C with ethanol–water. The ethanol–water ratio was chosen to obtain high phenolic acid and diterpene concentrations in the extract. The selected solvent composition gave liquid extracts that could be directly added to a coating mixture for feeding into a spouted bed apparatus. Thus, no preliminary solvent exchange or evaporation of the extraction solvent to dryness was required. Food grade Paselli MD 6 maltodextrin and HiCap 100 modified starch were used as inert core and shell materials in the spouted bed encapsulation process under mild operating conditions. The antioxidant activity of the fresh extract was retained during processing, which indicated that the active constituents were preserved and quantitatively transferred into the encapsulated formulations, which were readily soluble in water. The obtained powders were composed of nearly spherical particles. Their compositions, water solubilities, and particle morphologies make them a strong candidate for food and beverage applications as natural antioxidants, preservatives, or functional ingredients.

在这项研究中，喷射床技术被应用于多酚迷迭香提取物的保护和功能化。首先，在25°C下用乙醇-水进行固液萃取。选择乙醇与水的比例可在提取物中获得较高的酚酸和二萜浓度。所选择的溶剂组合物给出了液体提取物，其可以直接添加到涂料混合物中以供入喷射床设备中。因此，不需要预先进行溶剂交换或将萃取溶剂蒸发至干。食品级Paselli MD 6麦芽糊精和HiCap 100改性淀粉在温和的操作条件下用作喷床封装过程中的惰性核和壳材料。新鲜提取物的抗氧化活性在加工过程中得以保留，这表明活性成分被保存并定量转移到容易溶于水的胶囊化制剂中。所获得的粉末由几乎球形的颗粒组成。它们的组成，水溶性和颗粒形态使其成为天然抗氧化剂，防腐剂或功能性成分在食品和饮料应用中的强大候选者。