College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710062, PR China; Centre for Nutrition and Food Science, Queensland Alliance for Agricultural and Food Innovation, The University of Queensland, Brisbane 4072, Australia.
College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710062, PR China.
Carbohydr Polym. 2017 May 1;163:81-91. doi: 10.1016/j.carbpol.2017.01.016. Epub 2017 Jan 7.
The objective of this study was to characterize the physical, mechanical and bioactive properties of chitosan film incorporated with thinned young apple polyphenols (YAP). The results indicated that the addition of YAP resulted in a significant increase in the thickness, density, swelling degree, solubility and opacity of chitosan film, but the water content, water vapor permeability and mechanical properties of the film were decreased. Besides, the antioxidant and antimicrobial properties of chitosan film were significantly enhanced by YAP. Both the NMR and FTIR spectra indicated the interactions between YAP and chitosan were likely to be non-covalent. Furthermore, the thermal stability of the film was decreased by YAP addition, suggested by DSC. Interestingly, the changing tendency of crystalline degree indicated by X-ray kept pace with that of thermal stability for YAP-chitosan films. Overall, YAP-chitosan film was shown a potential as a bioactive packaging material to extend food shelf-life.
本研究旨在描述壳聚糖薄膜中掺入经稀释的年轻苹果多酚（YAP）的物理、机械和生物活性特性。结果表明，YAP 的添加导致壳聚糖薄膜的厚度、密度、溶胀度、溶解度和不透明度显著增加，但薄膜的含水量、水蒸气透过率和机械性能降低。此外，壳聚糖薄膜的抗氧化和抗菌性能通过 YAP 显著增强。NMR 和 FTIR 光谱均表明 YAP 与壳聚糖之间的相互作用可能是非共价的。此外，添加 YAP 后，DSC 表明薄膜的热稳定性降低。有趣的是，X 射线表明的结晶度变化趋势与 YAP-壳聚糖薄膜的热稳定性保持一致。总体而言，YAP-壳聚糖薄膜有望成为一种具有生物活性的包装材料，以延长食品的保质期。
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