新型天然色素指示膜的制备与表征及其在猕猴桃新鲜度监测中的应用。
Preparation and characterization of novel natural pigment-indicating film: Application in kiwifruit freshness monitoring.
机构信息
State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Key Laboratory of Post-Harvest Fruit Processing, Key Laboratory of Post-Harvest Vegetable Preservation and Processing (Co-construction by Ministry and Province), Ministry of Agriculture and Rural Affairs, Zhejiang Key Laboratory of Intelligent Logistics and Processing of Fresh Food, Key Laboratory of Light Industry Fruit and Vegetable Preservation and Processing, Food Science Institute, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China.
Department of Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin, Department of Hematology and Hematopoietic Cell Transplantation, Comprehensive Cancer Center, City of Hope National Medical Center, Duarte, CA, United States.
出版信息
Food Chem. 2025 Jan 15;463(Pt 4):141491. doi: 10.1016/j.foodchem.2024.141491. Epub 2024 Sep 30.
The marketability of natural pigment-based indicator films is impeded by their weaker color rendering and stability compared with synthetic pigments. Here, we developed novel colorimetric indicators by blending polyvinyl alcohol (PVA) with carboxymethyl cellulose (CMC) and combining alizarin and curcumin. Compared with the individual materials, the PVA and CMC composite films demonstrated superior thermal stability and water resistance. The manufacturing process of these colorimetric indicators was optimized using response surface methodology. The optimum conditions were as follows: PVA at 3.92 g/100 mL; plate pour amount, 48.6 mL; pigment content, 5.8 g/100 mL; pigment ratio, 0.76. The optimized film showed a robust response to CO (a color difference of 65.06 ± 2.43). The color difference of the optimized film improved by 98.5 % and 16.86 % for kiwifruit stored at room and low temperatures, respectively. This substantial color change aids in identifying the optimal consumption window for kiwifruit, boosting indicator precision and kiwifruit freshness accuracy.
天然色素指示膜的市场性受到其颜色呈现和稳定性不如合成色素的限制。在这里，我们通过将聚乙烯醇（PVA）与羧甲基纤维素（CMC）混合，并结合茜素和姜黄素，开发了新型比色指示剂。与单一材料相比，PVA 和 CMC 复合膜表现出更好的热稳定性和耐水性。使用响应面法优化了这些比色指示剂的制造工艺。最佳条件如下：PVA 为 3.92 g/100 mL；平板浇铸量为 48.6 mL；颜料含量为 5.8 g/100 mL；颜料比例为 0.76。优化后的薄膜对 CO 具有很强的响应（色差为 65.06±2.43）。在室温下和低温下储存的猕猴桃的色差分别提高了 98.5%和 16.86%。这种显著的颜色变化有助于确定猕猴桃的最佳食用窗口，提高了指示剂的精度和猕猴桃的新鲜度准确性。
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