Huang Han-Lun, Tsai I-Lin, Lin Chi, Hang Yu-Hao, Ho Yi-Cheng, Tsai Min-Lang, Mi Fwu-Long
Department of Food Science, National Taiwan Ocean University, Keelung 20224, Taiwan, ROC.
Department of Biochemistry and Molecular Cell Biology, School of Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan, ROC; Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan, ROC.
Carbohydr Polym. 2023 Jan 1;299:120133. doi: 10.1016/j.carbpol.2022.120133. Epub 2022 Sep 28.
In this study, metalloanthocyanin-inspired, biodegradable packaging films were developed by incorporating purple cauliflower extracted (PCE) anthocyanins into alginate (AL)/carboxymethyl chitosan (CCS) hybrid polymer matrices based on complexation of metal ions with these marine polysaccharides and anthocyanins. PCE anthocyanins-incorporated AL/CCS films were further modified with fucoidan (FD) because this sulfated polysaccharide can form strong interactions with anthocyanins. Metals-involved complexation (Ca and Zn-crosslinked films) improved the mechanical strength and water vapor permeability but reduced the swelling degree of the films. Zn-cross-linked films exhibited significantly higher antibacterial activity than did pristine (non-crosslinked) and Ca-cross-linked films. The metal ion/polysaccharide-involved complexation with anthocyanin reduced the release rate of anthocyanins, increased the storage stability and antioxidant capability, and improved the sensitivity of the colorimetric response of the indicator films for monitoring the freshness of shrimp. The anthocyanin-metal-polysaccharide complex film showed great potential as active and intelligent packaging of food products.
在本研究中，基于金属离子与这些海洋多糖和花青素的络合作用，通过将紫色花椰菜提取物（PCE）花青素掺入藻酸盐（AL）/羧甲基壳聚糖（CCS）杂化聚合物基质中，开发了受金属花青素启发的可生物降解包装薄膜。掺入PCE花青素的AL/CCS薄膜进一步用岩藻依聚糖（FD）进行改性，因为这种硫酸化多糖能与花青素形成强相互作用。涉及金属的络合作用（钙和锌交联薄膜）提高了薄膜的机械强度和水蒸气透过率，但降低了薄膜的溶胀度。锌交联薄膜表现出比原始（未交联）和钙交联薄膜显著更高的抗菌活性。金属离子/多糖与花青素的络合作用降低了花青素的释放速率，提高了储存稳定性和抗氧化能力，并改善了用于监测虾新鲜度的指示薄膜比色响应的灵敏度。花青素 - 金属 - 多糖复合薄膜作为食品的活性和智能包装具有巨大潜力。
