Department of Food Science and Technology, Faculty of Agriculture, Urmia University, Urmia, Iran.
Afagh Higher Education Institute of Urmia, Urmia, Iran.
Int J Biol Macromol. 2023 Jan 1;224:1588-1599. doi: 10.1016/j.ijbiomac.2022.10.244. Epub 2022 Oct 28.
In this study, maltodextrin (MDex), lutein pigment (Lut) and alumina (Al) were used to modify biodegradable film based on cress seed mucilage (Muc/MDex/Lut/Al). Central composite design (CCD) was used to study the effects of MDex, Lut and Al on the physical and chemical properties of the mucilage based film. The physicochemical, mechanical, antimicrobial and structural properties of the films were studied by various techniques such as FTIR, SEM, and XRD and TGA. The release of lutein from the film was investigated at 25 °C for 15 days. The results showed that lutein, alumina and maltodextrin increased the film thickness and lutein decreased the solubility and moisture content of the film. Maltodextrin improved the mechanical properties of the film and lutein reduced the film's flexibility. Lutein greatly increased its antioxidant properties, but alumina slightly increased its antioxidant properties. Lutein, alumina and maltodextrin improved the antibacterial properties of the film. Muc/MDex/Lut/Al film showed 26 ± 0.5 and 23 ± 0.8 mm non-growth halo against to Staphylococcus aureus and Escherichia coli, respectively. Maltodextrin filled the surface cracks, but lutein increased the surface cracks of mucilage film. The amorphous structure of the pure cress seed mucilage film was confirmed by XRD, which the alumina and lutein gave crystalline properties in the film. Maltodextrin and alumina increased the thermal stability of the film. The release results showed that the release rate of lutein depends on the structure of the film and by changing the structure of the film, the release rate can be purposefully controlled according to the required release rate.
在这项研究中，使用麦芽糊精（MDex）、叶黄素色素（Lut）和氧化铝（Al）来修饰基于荠菜籽胶的可生物降解膜（Muc/MDex/Lut/Al）。采用中心复合设计（CCD）来研究 MDex、Lut 和 Al 对基于荠菜籽胶的膜的物理和化学性质的影响。通过各种技术，如傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）和 X 射线衍射（XRD）和热重分析（TGA）来研究膜的物理化学、机械、抗菌和结构性质。在 25°C 下研究了叶黄素从膜中的释放情况，为期 15 天。结果表明，叶黄素、氧化铝和麦芽糊精增加了膜的厚度，而叶黄素降低了膜的溶解度和水分含量。麦芽糊精改善了膜的机械性能，而叶黄素降低了膜的柔韧性。叶黄素大大提高了其抗氧化性能，但氧化铝略微提高了其抗氧化性能。叶黄素、氧化铝和麦芽糊精提高了膜的抗菌性能。Muc/MDex/Lut/Al 膜对金黄色葡萄球菌和大肠杆菌的非生长晕分别为 26±0.5 和 23±0.8mm。麦芽糊精填充了表面裂纹，但叶黄素增加了荠菜籽胶膜的表面裂纹。XRD 证实了纯荠菜籽胶膜的无定形结构，而氧化铝和叶黄素在膜中赋予了结晶性质。麦芽糊精和氧化铝提高了膜的热稳定性。释放结果表明，叶黄素的释放速率取决于膜的结构，通过改变膜的结构，可以根据所需的释放速率有目的地控制释放速率。
