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. 2021 Sep 1;355:129573. doi: 10.1016/j.foodchem.2021.129573. Epub 2021 Mar 15.
This study designed a new type indicator with hydrophobic Polyvinylidene Fluoride (PVDF) film as a moisture prevent-layer. And the sensor layer was provided based on polyvinyl alcohol/Sodium alginate (PS) and Roselle anthocyanins (RAs). Physical properties, microstructure, and color stability of the bi-layer indicator have been investigated. The Water contact angle (WCA) of PS/RAs/ PVDF film (PSRF) was 108.85°, which can be considered as an excellent hydrophobic surface. The lowest Water Vapor Permeability (WVP) value of PSRF exhibited a good barrier property for moisture. Therefore, PSRF film was used to monitor the griskin freshness. The Total volatile basic nitrogen (TVB-N) level was increased to 18.02 mg/100 g at 72 h, and the color of the indicator presented visible color changes. The acquired results revealed a good correlation between TVB-N, pH and color change of the indicator. The research indicated that PSRF indicator has increasing potential application on food intelligent packaging.
本研究设计了一种新型指示计，以疏水性聚偏二氟乙烯（PVDF）薄膜作为防潮层。传感器层基于聚乙烯醇/海藻酸钠（PS）和洛神花花青素（RAs）提供。研究了双层指示剂的物理性质、微观结构和颜色稳定性。PS/RAs/PVDF 薄膜（PSRF）的水接触角（WCA）为 108.85°，可视为优异的疏水表面。PSRF 表现出最低的水蒸气透过率（WVP）值，具有良好的防潮性能。因此，PSRF 薄膜用于监测冷藏猪肉的新鲜度。在 72 小时时，总挥发性碱性氮（TVB-N）水平上升至 18.02mg/100g，且指示计的颜色呈现出明显的可见颜色变化。获得的结果表明 TVB-N、pH 值和指示计颜色变化之间存在良好的相关性。研究表明，PSRF 指示计在食品智能包装上具有越来越大的潜在应用价值。
