Benito-Román Ó, Sanz T, Beltrán S
Department of Biotechnology and Food Science (Chemical Engineering Section), Faculty of Sciences, University of Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain.
Heliyon. 2020 Apr 1;6(4):e03615. doi: 10.1016/j.heliyon.2020.e03615. eCollection 2020 Apr.
In this work, the encapsulation of rice bran oil extracted using supercritical CO has been studied. In the first stage, the emulsification process by high pressure homogenization was studied and optimized. The effect of the working pressure (60-150 MPa), the composition of the carrier (mixtures of pea protein isolate (PPI) and maltodextrin (MD), from 50 to 90% of PPI) and the carrier to oil ratio (2-4) on the emulsion droplet size (EDS) was studied. To minimize the EDS, moderate pressures (114 MPa), a carrier composed mainly by PPI (64%) and carrier to oil ratios around 3.2 were required. The emulsion obtained in the optimal conditions (EDS = 189 ± 3nm) was dried using different technologies (spray-drying, PGSS-drying and freeze drying). The supercritical CO based drying process (PGSS) provided spherical particles that resulted in the smallest average size (but broader distribution) and lower encapsulation efficiency (53 ± 2%).
在这项工作中，对使用超临界CO₂萃取的米糠油的包封进行了研究。在第一阶段，对高压均质乳化过程进行了研究和优化。研究了工作压力（60 - 150MPa）、载体组成（豌豆分离蛋白（PPI）和麦芽糊精（MD）的混合物，PPI占50%至90%）以及载体与油的比例（2 - 4）对乳液滴尺寸（EDS）的影响。为了使EDS最小化，需要中等压力（114MPa）、主要由PPI（64%）组成的载体以及约3.2的载体与油比例。在最佳条件下获得的乳液（EDS = 189 ± 3nm）使用不同技术（喷雾干燥、PGSS干燥和冷冻干燥）进行干燥。基于超临界CO₂的干燥过程（PGSS）提供了球形颗粒，其平均尺寸最小（但分布较宽）且包封效率较低（53 ± 2%）。
