PAM-PAPC, 1 Esplanade Erasme, Université de Bourgogne - Agrosup Dijon, F-21000 Dijon, France.
Carbohydr Polym. 2013 Aug 14;97(1):217-25. doi: 10.1016/j.carbpol.2013.04.059. Epub 2013 Apr 30.
Different chitosan coating solutions were tested with the aim of investigating their adhesion and wettability onto polyethylene film to improve packaging performance and provide antimicrobial properties. Surface wetting kinetics was monitored by contact angle measurements. Addition of ethanol and carvacrol improved wettability and adhesion of the thin chitosan layer. Structure, water vapour, O2, CO2 and air permeabilities of self supported chitosan films and coated polyethylene were determined. The formation of a thin chitosan layer on polyethylene improved gas barrier properties decreasing the Permeability Coefficient for oxygen and carbon dioxide ( [Formula: see text] , [Formula: see text] ) from 100 to 10,000 times. Presence of carvacrol in the chitosan coating layer increased [Formula: see text] , [Formula: see text] and Pair by a factor of ten. Moreover, it influenced film microstructure. However chitosan was shown to be good gas barrier film in the dry state.
不同的壳聚糖涂层溶液进行了测试，目的是研究其对聚乙烯薄膜的附着力和润湿性，以提高包装性能和提供抗菌性能。通过接触角测量监测表面润湿动力学。添加乙醇和香芹酚可提高壳聚糖薄层的润湿性和附着力。测定了自支撑壳聚糖薄膜和涂覆聚乙烯的水蒸气、氧气、二氧化碳和空气渗透率。在聚乙烯上形成一层薄薄的壳聚糖层可改善气体阻隔性能，使氧气和二氧化碳的渗透系数（[公式：见文本]，[公式：见文本]）降低 100 至 10,000 倍。壳聚糖涂层中香芹酚的存在使[公式：见文本]，[公式：见文本]和 Pair 增加了十倍。此外，它还影响薄膜的微观结构。然而，壳聚糖在干燥状态下是一种良好的气体阻隔膜。
