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International Journal of Biological Macromolecules

International Journal of Biological Macromolecules

IF: 7.7
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Pectin/zinc alginate films containing anthocyanins from dragon fruit peel as intelligent pH indicators for shrimp freshness monitor

Published:3 December 2024 DOI: 10.1016/j.ijbiomac.2024.138317 PMID: 39638182
Chang Liu,?Ning Li,?Xinyu An,?Xu Li,?Zhiming Liu

Abstract

The novel incorporation of dragon fruit peel extract (DE), rich in anthocyanins, Zn2+ (from Zinc Alginate) and pectin was applied to create active and intelligent food packaging composite films. These films were characterized for their microstructure and properties. Various levels of anthocyanin extracts (1?%, 3?%, and 5?%) were evaluated for their impact on the films' physical and functional properties, incorporating microstructure, mechanical strength, barrier properties, pH sensitivity, and bacteriostatic effectiveness. The films exhibited a significant antibacterial rate of up to 99.99?% against common foodborne pathogens, enhanced flame retardancy with an enhancement of 32.7?%, and a broad pH sensitivity range, indicating their adaptability to various conditions. The results demonstrated that the prepared indicator film achieved a 50?% reduction in water vapor permeability. Additionally, the mechanical properties were enhanced, with only a slight decrease of 12.2?% in tensile strength and 14.0?% in elongation at break. In tests monitoring shrimp freshness, pectin/ZA/DE films showed notable color changes correlating with shrimp quality. These specific values highlight the pectin/ZA/DE films' potential for real-world applications, suggesting that they have potential applications as smart packaging materials in the food industry.

Substances (6)

Materials
Procduct Name CAS Molecular Formula Supplier Price
Glycerol 56-81-5 C3H8O3 1785 suppliers $5.00-$6250.00
Succinic acid 110-15-6 C4H6O4 1095 suppliers $5.00-$6302.73
Ethanol 64-17-5 C2H6O 808 suppliers $10.00-$17310.00
Zinc chloride 7646-85-7 Cl2Zn 624 suppliers $10.00-$6990.00
Starch 9005-25-8 (C6H10O5)n 442 suppliers $13.50-$1730.00
Pectin 9000-69-5 C6H12O6 432 suppliers $13.50-$6898.73

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