School of Chemistry and Bioengineering, University of Science & Technology Beijing, Beijing 100083, China.
Shandong Peninsula Engineering Research Center of Comprehensive Brine Utilization, Weifang University of Science and Technology, Shouguang, China.
Carbohydr Polym. 2024 Sep 1;339:122238. doi: 10.1016/j.carbpol.2024.122238. Epub 2024 May 13.
The study aimed to develop a novel, transparent and non-toxic coating with antimicrobial, antioxidant, and antifogging properties. The p-coumaric acid-grafted chitosan (CS-PCA) was synthesized via a carbodiimide coupling reaction and then characterized. The CS-PCA coatings were further prepared using the casting method. The CS-PCA coatings obtained exhibited excellent transparency, UV-light barrier ability, and antifogging properties, as confirmed by spectroscopy and antifogging tests. The CS-PCA coatings showed stronger antioxidant capacity and antimicrobial properties against Escherichia coli, Staphylococcus aureus and Botrytis cinerea compared to CS. The multifunctional coatings were further coated on the polyethylene cling film and their effectiveness was confirmed through a strawberry preservation test. The decay of the strawberries was reduced by CS-PCA coated film at room temperature.
本研究旨在开发一种具有抗菌、抗氧化和防雾功能的新型透明无毒涂层。通过碳二亚胺偶联反应合成了对香豆酸接枝壳聚糖（CS-PCA），并对其进行了表征。进一步采用浇注法制备了 CS-PCA 涂层。光谱和防雾测试证实，所得 CS-PCA 涂层具有优异的透光性、紫外光阻隔能力和防雾性能。与 CS 相比，CS-PCA 涂层具有更强的抗氧化能力和对大肠杆菌、金黄色葡萄球菌和葡萄孢菌的抗菌性能。进一步将多功能涂层涂覆在聚乙烯保鲜膜上，并通过草莓保鲜试验证实了其有效性。CS-PCA 涂层膜可减少草莓在室温下的腐烂。
