Plant protein-stabilized Pickering nanoemulsions show potential as plant-based milk substitutes; however, their stability is challenged by mechanical stress during transportation and oxidative deterioration during storage. Herein, soybean isolate protein-curcumin composite nanoparticle (SPI-Cur-NPs)-stabilized Pickering nanoemulsions were converted into microcapsule powders via spray-drying with maltodextrin (MD), trehalose anhydrous (TA), and inulin (IN) as wall materials. Robust intermolecular hydrogen bonds and an amorphous structure were formed using composite wall materials, reducing microcapsule surface fissures while improving encapsulation rate (92.7 %) and solubility (>95 %). Moisture sorption isotherms indicated that the composite wall microcapsules demonstrated moisture resistance at a low-water activity (aw < 0.43) and superior hygroscopicity at a high-water activity (aw > 0.67). Accelerated oxidation tests revealed that the presence of curcumin and composite wall materials enhanced oxidative stability, demonstrating a low peroxide value (2.21 mmol/kg [34.4 %]) and TBARS content (97.8 μg/g [18.7 %]). Consequently, microencapsulated powders prepared with SPI-Cur-NPs and MD-TA-IN could potentially improve the limitation of plant-based milk substitutes.

中文翻译：

---

使用大豆蛋白-姜黄素复合纳米颗粒稳定含核桃油的 Pickering 纳米乳液的微胶囊化：一种新型植物性牛奶替代品的制备和评估


植物蛋白稳定的 Pickering 纳米乳剂显示出作为植物基牛奶替代品的潜力;然而，它们的稳定性受到运输过程中的机械应力和储存过程中的氧化变质的挑战。本文以麦芽糊精 （MD）、无水海藻糖 （TA） 和菊粉 （IN） 为壁材，通过喷雾干燥将大豆分离蛋白-姜黄素复合纳米颗粒 （SPI-Cur-NPs） 稳定的 Pickering 纳米乳液转化为微胶囊粉末。使用复合壁材料形成坚固的分子间氢键和非晶结构，减少了微胶囊表面的裂缝，同时提高了包封率 （92.7 %） 和溶解度 （>95 %）。吸湿等温线表明，复合壁微胶囊在低水分活度 （aw < 0.43） 下表现出优异的耐湿性，在高水分活度下表现出优异的吸湿性 （aw > 0.67）。加速氧化测试表明，姜黄素和复合壁材料的存在增强了氧化稳定性，显示出低过氧化值 （2.21 mmol/kg [34.4 %]）和 TBARS 含量 （97.8 μg/g [18.7 %]）。因此，用 SPI-Cur-NPs 和 MD-TA-IN 制备的微胶囊粉末可能会改善植物基乳替代品的局限性。