High strength, controlled release of curcumin-loaded ZIF-8/chitosan/zein film with excellence gas barrier and antibacterial activity for litchi preservation. (15th April 2023)

• Record Type: Journal Article
• Authors: Geng, Chao; Liu, Xueying; Ma, Jinlian; Ban, Haina; Bian, Hedong; Huang, Guohuan
• Is Part Of: Carbohydrate polymers. Volume 306(2023)
• Publication Date: 2023-04-15
• Subjects: Chitosan -- Zein -- Zeolitic imidazolate framework-8 -- Interfacial compatibility -- Intelligent responsive -- Fruit preservation; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2023.120612
• Languages: English
• ISSNs: 0144-8617

Abstract

Abstract: Polysaccharide films containing protein additives have good application prospects in agriculture and food field. However, interfacial incompatibility between hydrophobic proteins and hydrophilic polymers remains a major technical challenge. In this work, the interfacial compatibility between hydrophobic zein and hydrophilic chitosan (CS) is improved by the chemical crosslinking between zinc ions of curcumin-loaded zeolitic imidazolate framework-8 (Cur-ZIF-8) with CS and zein. With the improvement of interface compatibility, the results show that the elongation at break and O2 barrier property of synthesized Cur-ZIF-8/CS/Zein are 9.2 and 1.5 times higher than CS/Zein, respectively. And the Cur-ZIF-8/CS/Zein exhibits superior antibacterial and antioxidant properties as well. Importantly, Cur-ZIF-8/CS/Zein can also be used as an intelligent-responsive release platform for curcumin. As a result, Cur-ZIF-8/CS/Zein can keep the freshness and appearance of litchi at least 8 days longer than that of CS/Zein. Therefore, this study provides a novel method to improve the interfacial compatibility between hydrophobic proteins and hydrophilic polymers, and is expected to expand the application of protein/polymer composites in agriculture and food field. Graphical abstract: Unlabelled Image Highlights: The interfacial compatibility between zein and CS is improved by using Cur-ZIF-8 as a bridge. The elongation at break of Cur-ZIF-8/CS/Zein is 9.2 times higher than CS/Zein. The O2 barrier property of Cur-ZIF-8/CS/Zein is 1.5 times higher than CS/Zein. Cur-ZIF-8/CS/Zein can be used as an intelligent release platform for curcumin. Cur-ZIF-8/CS/Zein can keep freshness of litchi at least 8 days longer than CS/Zein.