The scCO2-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 scCO2-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 scCO2-assisted impregnation process. The effect of the processing variables of the scCO2-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.

中文翻译：

---

食品应用的超临界浸渍：综述操作变量对活性化合物负载的影响。

scCO 2辅助的浸渍方法已经成为浸渍固体材料的有效方法。它的多重优势包括高扩散性，允许获得游离溶剂材料并在低温下运行，从而可以处理不耐热的溶质。这些特性使其在工业规模上可用于用杀真菌剂浸渍木材，并在最近几年用于纺织品染色。同时，还在实验室规模研究其他许多应用。一个潜在的应用领域是与食品相关的行业，其中包括使用scCO2辅助浸渍工艺开发用于食品包装的活性材料，以及生产用于食品功能性食品的食品级材料。在这个框架中 本文总结了scCO2辅助浸渍工艺的优点和主要缺点。根据活性化合物在聚合物结构中的掺入，讨论了scCO2辅助浸渍过程的工艺变量的影响。包括过程的原理和描述，以及对所研究系统的回顾，以便更好地理解。