Multifunctional bionanocomposite films based on konjac glucomannan/chitosan with nano-ZnO and mulberry anthocyanin extract for active food packaging
Multifunctional bionanocomposite films based on konjac glucomannan/chitosan with nano-ZnO and mulberry anthocyanin extract for active food packaging
复制标题
用于活性食品包装的基于魔芋葡甘聚糖/壳聚糖、纳米氧化锌和桑花青素提取物的多功能生物纳米复合薄膜
DOI：
10.1016/j.foodhyd.2020.105942
复制
发表时间：
2020-10-01
影响因子：
10.7
通讯作者：
Wu, Chunhua
中科院分区：
文献类型：
--
作者：
Sun, Jishuai;Jiang, Haixin;Wu, Chunhua
本研究以魔芋葡甘露聚糖(KGM)/壳聚糖（CS） （KC）为基材，采用溶液浇铸法制备了一系列以纳米zno和桑葚花青素提取物（MAE）为基材的多功能生物纳米复合膜（KCZ-MAE）。研究了纳米zno和/或MAE对KC生物复合膜的流变性、理化性质和功能特性的影响。薄膜的截面微观结构表明，薄膜致密致密。MAE的加入虽然降低了薄膜的透光率，但增强了薄膜的UV-Vis阻隔性能。膜的水蒸气渗透性（WVP）由4.09 (g mm/m(2).day降低。kPa)分别为KCZ、KCZ- mae I、KCZ- mae II和KCZ- mae III膜的2.84、2.61、1.82和2.40。相反，薄膜的抗拉强度（TS）由42.83 MPa提高到52.00 MPa。KCZ-MAE薄膜具有较强的抗氧化活性、良好的热稳定性和对大肠杆菌和金黄色葡萄球菌的抑菌活性。KCZ- mae膜的抗氧化活性高于KC膜和KCZ膜，分别为65.93%、69.14%和71.98%。此外，KCZ-MAE薄膜在不同的缓冲溶液（pH 2-12）中呈现出较宽的从红色到蓝色的颜色差异，这是肉眼可以明显观察到的。多功能生物纳米复合薄膜在活性和智能食品包装方面具有广阔的应用前景。
In this study, a series of multifunctional bionanocomposite films (KCZ-MAE) based on konjac glucomannan (KGM)/chitosan (CS) (KC) with Nano-ZnO and mulberry anthocyanin extract (MAE) were prepared by a solution casting method. Effects of Nano-ZnO and/or MAE on rheology of film-forming solutions (FFS), physicochemical properties and functional properties of the KC biocomposite films were systematically characterized. Cross-section microstructure of the films showed that the films were dense and compact. Although the incorporation of MAE decreased the transmittance of the films, it enhanced the UV-Vis light barrier properties. Water vapor permeability (WVP) of the films was decreased from 4.09 (g mm/m(2).day.kPa) for KC film to 2.84, 2.61, 1.82 and 2.40 for KCZ, KCZ-MAE I, KCZ-MAE II and KCZ-MAE III films, respectively. In contrast, the tensile strength (TS) of films increased from 42.83 MPa to 52.00 MPa. Also, KCZ-MAE films showed strong antioxidant activity, good thermal stability and good antibacterial activity against E. coli and S. aureus. KCZ-MAE films showed the higher antioxidant activity than KC and KCZ film, respectively 65.93%, 69.14% and 71.98%. Moreover, the KCZ-MAE films presented relatively wide color differences from red to blue in different buffer solutions (pH 2-12), which was clearly observed by the naked eye. The multifunctional bionanocomposite films have promising potential for applications in active and intelligent food packaging in the future.