Laboratory of Membrane Separation Processes (LabProSeM) Department of Chemical Engineering, University of Santiago de Chile, Santiago, Chile.
Food Packaging Laboratory Department of Food Science and Technology, Center for the Development of Nanoscience and Nanotechnology (CEDENNA), University of Santiago de Chile, Santiago, Chile.
Crit Rev Food Sci Nutr. 2020;60(8):1290-1301. doi: 10.1080/10408398.2019.1567459. Epub 2019 Feb 7.
The scCO-assisted impregnation process has arisen as an effective method to impregnate solid materials. Its multiple advantages include high diffusion, it allows to obtain free-solvent materials and to operate under low temperatures, which permits to process thermolabile solutes. These characteristics have allowed its application at industrial scale for the impregnation of wood with fungicides and in the last years for textile dyeing. Meanwhile, other numerous applications are still being studied at laboratory scale. One potential field of application corresponds to the food-related industry, which includes the use of scCO-assisted impregnation process to develop active materials for food packaging and to generate food-grade materials loaded with nutraceuticals for functional food applications. In this framework, this article summarizes the advantages and the main drawbacks with the scCO-assisted impregnation process. The effect of the processing variables of the scCO-assisted impregnation process is discussed in terms of the incorporation of active compounds within polymer structures. Including the principles and description of the process and a review of the investigated systems for a better understanding.
超临界 CO₂辅助浸渍工艺已成为一种有效的浸渍固体材料的方法。其多种优点包括高扩散性，它可以获得无溶剂的材料，并在低温下操作，这允许处理热敏溶质。这些特性使得它能够在工业规模上用于木材的杀菌剂浸渍，以及近年来用于纺织品染色。与此同时，其他许多应用仍在实验室规模上进行研究。一个潜在的应用领域与食品相关行业相对应，包括使用超临界 CO₂辅助浸渍工艺来开发用于食品包装的活性材料，并生成负载有营养保健品的食品级材料，用于功能性食品应用。在这一框架内，本文总结了超临界 CO₂辅助浸渍工艺的优点和主要缺点。讨论了超临界 CO₂辅助浸渍工艺的加工变量对活性化合物在聚合物结构中的掺入的影响。包括该过程的原理和描述，并对已研究的系统进行了回顾，以帮助更好地理解。
