Shaddel Rezvan, Alighadri Tina, Sani Mahmood Alizadeh-, Zahedi Younes, Rhim Jong Whan
Department of Food Science and Technology, Faculty of Agriculture and Natural resources, University of Mohaghegh Ardabili, Ardabil, Iran.
Department of Food Science and Technology, Faculty of Agriculture and Natural resources, University of Mohaghegh Ardabili, Ardabil, Iran.
Int J Biol Macromol. 2025 Aug;320(Pt 2):145910. doi: 10.1016/j.ijbiomac.2025.145910. Epub 2025 Jul 11.
Gelatin (G)- chitosan (Cs) composite packaging films were produced with incorporation of citric acid (CA) and/or cinnamaldehyde (C) as chemical crosslinkers. Then, the extract containing Echium amoenum (EA) anthocyanins (10 % v/v) as a pH indicator was added to G/Cs-based films containing the crosslinker. Physicochemical, composability and microbial properties of the obtained films were evaluated. The results showed that the films had a uniform, transparent appearance, and were capable of blocking UV rays. The G/Cs/CA5%/EA film showed better physical properties, higher mechanical strength (increase of 7.3 %), WVP (decrease of 1.98 %), lower stretchability (25.11 %), and higher thermal properties compared to the G/Cs /C5%/EA film. Simultaneous incorporation of EA and 5 % CA into the film led to a decline in WVP, water solubility (7.4 % reduction), and moisture content (1.23 % reduction) of the films, while the antioxidant properties (26.71 %) of G/Cs/C5%/EA were higher compared to G/Cs/CA5%/EA (14.31 %). SEM analysis revealed that films containing CA exhibited a smoother surface morphology. Finally, the films demonstrated obvious color changes due to fish spoilage and exposure to ammonium vapor. On the other hand, according to the results, the G/Cs/CA5%/EA film has better physical and chemical properties than other films.
通过加入柠檬酸（CA）和/或肉桂醛（C）作为化学交联剂制备了明胶（G）-壳聚糖（Cs）复合包装薄膜。然后，将含有作为pH指示剂的蓝蓟（EA）花青素（10% v/v）的提取物添加到含有交联剂的基于G/Cs的薄膜中。对所得薄膜的物理化学、可加工性和微生物特性进行了评估。结果表明，这些薄膜外观均匀、透明，并且能够阻挡紫外线。与G/Cs /C5%/EA薄膜相比，G/Cs/CA5%/EA薄膜表现出更好的物理性能、更高的机械强度（提高7.3%）、水蒸气透过率（降低1.98%）、更低的拉伸性（25.11%）以及更高的热性能。将EA和5% CA同时加入薄膜中导致薄膜的水蒸气透过率、水溶性（降低7.4%）和水分含量（降低1.23%）下降，而G/Cs/C5%/EA的抗氧化性能（26.71%）高于G/Cs/CA5%/EA（14.31%）。扫描电子显微镜分析表明，含有CA的薄膜呈现出更光滑的表面形态。最后，由于鱼肉变质和暴露于铵蒸气中，薄膜表现出明显的颜色变化。另一方面，根据结果，G/Cs/CA5%/EA薄膜比其他薄膜具有更好的物理和化学性能。
