Quercetin, a flavonoid with outstanding antioxidant and antimicrobial properties, was adsorbed onto maize starch aerogel (MSA) and calcium alginate aerogel (CAA) through supercritical carbon dioxide adsorption. The composite systems may be applied in active packaging for food preservation. Supercritical adsorption experiments were performed at 180 bar and 40 and 60 °C. They showed that the higher amount of charged quercetin was obtained at 60 °C onto CAA as support. Field emission scanning electron microscopy (FESEM), Fourier transform infrared (FTIR) spectroscopy, X-ray diffractometry (XRD), specific surface area (SSA) determination, and differential scanning calorimetry (DSC) were used to characterize the composite systems. In vitro dissolution tests were also performed to study the possibility of employing quercetin adsorbed onto MSA and CAA as an active layer in food packaging.

中文翻译：

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槲皮素在活性包装气凝胶上的超临界吸附

槲皮素是一种具有出色的抗氧化剂和抗菌性能的类黄酮，通过超临界二氧化碳吸附作用被吸附到玉米淀粉气凝胶（MSA）和海藻酸钙气凝胶（CAA）上。所述复合系统可以应用于用于食品保存的主动包装中。超临界吸附实验是在180 bar和40和60°C下进行的。他们表明，在60°C的条件下，以CAA为载体可获得更高含量的带电槲皮素。场发射扫描电子显微镜（FESEM），傅立叶变换红外（FTIR）光谱，X射线衍射法（XRD），比表面积（SSA）测定和差示扫描量热法（DSC）用于表征复合系统。