College of Biological Science & Biotechnology, Beijing Key Laboratory of Forest Food Processing and Safety, Beijing Forestry University, Beijing 100083, China.
College of Biological Science & Biotechnology, Beijing Key Laboratory of Forest Food Processing and Safety, Beijing Forestry University, Beijing 100083, China.
Int J Biol Macromol. 2023 Dec 31;253(Pt 7):127435. doi: 10.1016/j.ijbiomac.2023.127435. Epub 2023 Oct 14.
Because of the impact of petroleum-based polymers on environmental deterioration and the need for safe, efficient, and functional packaging films, a sodium alginate (SA)-based film incorporating a Schisandra chinensis extract (SCE)-natamycin (NA) complex was developed for the desired physical and functional properties. The incorporation of SCE-NA into SA-based films decreased the water vapor transmission rate (WVTR), moisture content (MC), and hydrophilicity of the films and improved their opacity, elongation at break (EAB), and thermal stability. Scanning Electron Microscopy (SEM), Fourier Transform Infrared (FTIR), X-ray photoelectron spectroscopy (XPS), and X-ray Diffraction (XRD) analyses showed that SA, SCE, and NA had positive interactions and compatibility. In addition, the antimicrobial activity analysis indicated that the SA-SCE-NA film-forming solutions had satisfactory antimicrobial activity against Staphylococcus aureus, Escherichia coli, Saccharomyces cerevisiae, and Aspergillus niger. SA-based composite films have been used to coat cucumbers and blueberries to extend their shelf life. Compared to the neat SA film, the shelf life of cucumbers treated with the SA-SCE-NA film increased by 6 days compared to that in the untreated group at 28 °C, and the shelf life of blueberries increased by 5 days at 4 °C, revealing its potential utilization in food packaging.
由于石油基聚合物对环境恶化的影响，以及对安全、高效和功能性包装薄膜的需求，开发了一种基于海藻酸钠（SA）的薄膜，其中包含五味子提取物（SCE）-纳他霉素（NA）复合物，以获得所需的物理和功能特性。将 SCE-NA 掺入基于 SA 的薄膜中，降低了水蒸气透过率（WVTR）、水分含量（MC）和薄膜的亲水性，并提高了其不透明度、断裂伸长率（EAB）和热稳定性。扫描电子显微镜（SEM）、傅里叶变换红外（FTIR）、X 射线光电子能谱（XPS）和 X 射线衍射（XRD）分析表明，SA、SCE 和 NA 具有积极的相互作用和相容性。此外，抗菌活性分析表明，SA-SCE-NA 成膜溶液对金黄色葡萄球菌、大肠杆菌、酿酒酵母和黑曲霉具有令人满意的抗菌活性。基于 SA 的复合薄膜已用于涂覆黄瓜和蓝莓以延长其货架期。与未处理的对照组相比，在 28°C 下，用 SA-SCE-NA 薄膜处理的黄瓜的货架期比用纯 SA 薄膜处理的黄瓜延长了 6 天，在 4°C 下蓝莓的货架期延长了 5 天，表明其在食品包装中的潜在应用。
