Agricultural Product Processing and Storage Lab, School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China.
Agricultural Product Processing and Storage Lab, School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China.
Food Chem. 2022 May 30;377:131909. doi: 10.1016/j.foodchem.2021.131909. Epub 2021 Dec 22.
A novel bilayer colorimetric film incorporating polycaprolactone (PCL) with clitoria ternatea Linn anthocyanin (CA) via electrospinning was designed. The PCL nanofibers layer acted as a protective layer against harsh environments as the strong hydrophobic with the WCA (water contact angle) values of 101.79°. The PCL-CA layer worked as an indicator for its significant color changes for pH. The sensitivity test verified the ammonia cycler reversibility of the nanofibers is promising for re-use packaging. And the PCL/PCL-CA film was characterized as suitable WVP (water vapour permeability), and the lower velocity of water penetrating. Moreover, higher elongation at break (240.431%), and color stability were achieved. Besides, the film exhibited the color change from pale-blue to yellow-green response as an indication of shrimp spoilage (21 h). These results suggested the potential application of the PCL/PCL-CA film for a reusable freshness sensor tool in food packaging.
设计了一种新型双层比色膜，通过静电纺丝将聚己内酯（PCL）与三叶木蓝花青苷（CA）结合在一起。PCL 纳米纤维层作为保护层，以抵抗恶劣环境，其 WCA（水接触角）值为 101.79°。PCL-CA 层作为指示剂，对 pH 值有明显的颜色变化。灵敏度测试验证了纳米纤维的氨循环可逆性有望用于再利用包装。PCL/PCL-CA 薄膜具有合适的水蒸气透过率（WVP）和较低的水渗透速度。此外，还实现了更高的断裂伸长率（240.431%）和颜色稳定性。此外，该薄膜还表现出从浅蓝色到黄绿色的颜色变化，作为虾类变质的指示（21 小时）。这些结果表明，PCL/PCL-CA 薄膜在食品包装中作为可重复使用的新鲜度传感器工具具有潜在的应用前景。
