Pomegranate seed oil (PSO) is rich in bioactive compounds and is susceptible to oxidation. This research sought to encapsulate PSO in conventional and Pickering emulsions using whey protein isolate (WPI) microgels, WPI in its natural form, gum Arabic (GA), and WPI combinations with GA, maltodextrin (MD), and modified starch (Capsul®) as aqueous phase/emulsifier followed by spray drying. Emulsions with 1.39–2.55 μm droplet size, low viscosity (1.47–3.96 mPa s), and final interfacial tensions of 4.21–9.97 mN m⁻¹ were obtained. All formulations were stable with the Turbiscan stability index between 4.57% and 12.95% at 24 h. Emulsions resulted in particles with encapsulation efficiency and yield of 56.28–73.83% and 28.07–93.99%, respectively. PSO powders had small particle sizes (9.86–22.60 μm), high glass transition temperature (103.24–121.62 °C), and oxidative stability index (OSI) of 2.71 h and in the range of 4.11–21.23 h for non-encapsulated and encapsulated PSO, respectively. All formulations promoted the oil oxidative protection when compared with the non-encapsulated one. Treatments presented feasible values of A_w, moisture, solubility, and hygroscopicity for handling and storage of the powders. WPI, WPI:Capsul®, and Pickering treatments promoted greater protection of the encapsulated oil; however, the combination of WPI with modified starch was considered the best wall material, allowing protection of PSO and future applications in the food industry.

中文翻译：

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乳化后喷雾干燥对石榴籽油的包封：不同生物聚合物的评价及其对颗粒性质的影响

石榴籽油（PSO）富含生物活性化合物，容易氧化。这项研究试图使用乳清蛋白分离（WPI）微凝胶，天然形式的WPI，阿拉伯树胶（GA）以及WGA与GA，麦芽糊精（MD）和改性淀粉（Capsul®）的组合将PSO封装在常规乳液和Pickering乳液中。作为水相/乳化剂，然后喷雾干燥。液滴尺寸为1.39–2.55μm，低粘度（1.47–3.96 mPa s）和最终界面张力为4.21-9.97 mN m ^-1的乳液获得了。所有制剂均稳定，在24 h时Turbiscan稳定性指数在4.57％至12.95％之间。乳液导致颗粒的包封效率和产率分别为56.28-73.83％和28.07-93.99％。PSO粉末的粒径小（9.86–22.60μm），玻璃化转变温度高（103.24–121.62°C），氧化稳定性指数（OSI）为2.71 h，未封装和封装的氧化稳定性指数在4.11–21.23 h范围内PSO，分别。与未包封的制剂相比，所有制剂均能促进油的氧化保护。处理表明A _w的可行值，湿度，溶解度和吸湿性，以用于粉末的处理和储存。WPI，WPI：Capsul®和Pickering处理促进了对封装油的更好保护；但是，WPI和改性淀粉的组合被认为是最好的墙体材料，可以保护PSO和在食品工业中的未来应用。