The work aimed to encapsulate oils recovered from brewer’s spent grain by particles from gas saturated solutions technique using supercritical carbon dioxide as solvent and polyethylene glycol as wall material. The process conditions (pressure and temperature) and the wall material content were tested to produce an ingredient with enhanced physical properties and oxidative stability. Among the applied pressures (10, 20, 30, and 35 MPa), temperatures (45 and 55 °C) and oil to polyethylene glycol mixing ratios (1:5; 1:3, 1:2.5 and 1:2), the highest encapsulation efficiency was obtained at 20 MPa, 55 °C with an oil to polyethylene glycol mixing ratio equal to 1:3. With such conditions, the particles reported 73.5 ± 1.5% of encapsulated oil, with 58.1 ± 2.8% of the powder showing a mean diameter equal to 375 μm. The bulk and tapped densities were equal to 0.35 ± 0.01 and 0.38 ± 0.01 g · cm⁻³, while the wettability resulted of 3.2 ± 0.01 min. Furthermore, the encapsulated oil was oxidative stable up to 130 ± 3.2 h at 40 °C, as measured by isothermal calorimetry and peroxide value. The findings showed the potentials of particles from gas saturated solutions technique for the production of an ingredient for food, cosmetic and pharmaceutical applications.

中文翻译：

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气体饱和溶液技术中的颗粒对啤酒厂废谷物中回收的油的封装

该工作旨在通过使用超临界二氧化碳作为溶剂，聚乙二醇作为墙体材料，通过气体饱和溶液技术中的颗粒，封装从啤酒厂的废谷物中回收的油。测试了工艺条件（压力和温度）和壁材料含量，以生产具有增强的物理性能和氧化稳定性的成分。在施加的压力（10、20、30和35 MPa），温度（45和55°C）以及油与聚乙二醇的混合比（1：5; 1：3、1：2.5和1：2）中，油与聚乙二醇的混合比为1：3时，在20 MPa，55°C的条件下可获得最高的封装效率。在这样的条件下，颗粒报告的包封油为73.5±1.5％，粉末的58.1±2.8％显示平均直径等于375μm。⁻³，而润湿性为3.2±0.01分钟。此外，通过等温量热法和过氧化物值测量，包封的油在40°C时高达130±3.2 h的氧化稳定性。研究结果显示了来自气体饱和溶液技术的颗粒在生产食品，化妆品和制药应用成分中的潜力。