Active packaging based on cellulose trays coated with layered double hydroxide as nano‐carrier of parahydroxybenzoate: Application to fresh‐cut iceberg lettuce,Packaging Technology and Science

当前位置： X-MOL 学术 › Packag. Technol. Sci. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Active packaging based on cellulose trays coated with layered double hydroxide as nano‐carrier of parahydroxybenzoate: Application to fresh‐cut iceberg lettuce
Packaging Technology and Science ( IF 2.8 ) Pub Date : 2021-03-02 , DOI: 10.1002/pts.2565
Gianluca Viscusi ₁ , Valeria Bugatti _{1,

2} , Giuliana Gorrasi ₁

Affiliation

Layered double hydroxide (LDH) as nano‐carrier of parahydroxybenzoate (listed in EC Directive 10/2011) was coated on a biodegradable film of cellulose acetate, coupled with compostable cellulose cardboard and trays realized. The sustained release of parahydroxybenzoate ionically intercalated into the LDH resulted significantly slower than the parahydroxybenzoate free dispersed into the coating medium. Such active packaging showed significant antimicrobial activity against Salmonella enterica Typhimurium, Escherichia coli, Listeria monocytogenes and Lactobacillus sakei. It was more than one in all cases, ranging from 1.1 for E. coli to 2.6 for S. enterica Typhimurium. Overall migration tests in ethanol at 50% (v/v), as food simulant, showed that the prepared packaging is suitable for food contact, being the migrated amount below the limits imposed by the EU regulation. Fresh‐cut iceberg lettuce was packed into the prepared active packaging and in a control packaging with no active coating and stored in condition of thermal stress (i.e. 10°C). Organoleptic characteristics and the evolution up to 14 days of mesophilic lactic bacteria, total bacteria count, yeasts and moulds showed a significant inhibition of such strains from the active filler. Comparing the lettuce packed in control and active packaging, for mesophilic lactic bacteria, it was found a delta log of 0.24 (CFU), and for the total bacteria count, a delta log of 1.63 (CFU). The most significant effects were observed respect to yeasts and moulds and yeasts counts. For yeasts, it was observed a delta log of 2.32 (CFU), and for yeasts and moulds, a delta log of 2.5 (CFU). The prediction of the shelf life of the lettuce was done following the growth of E. coli up to 30 days through the Gompertz equation. It was found a prolongation of the shelf life from 11 to 16 days

中文翻译：

基于包裹有层状双氢氧化物作为对羟基苯甲酸酯的纳米载体的纤维素托盘的活性包装：在鲜切卷心莴苣中的应用

将层状双氢氧化物（LDH）作为对羟基苯甲酸酯的纳米载体（在EC指令10/2011中列出）涂在可生物降解的醋酸纤维素薄膜上，再加上可堆肥的纤维素纸板和已制成的托盘。离子嵌入LDH的对羟基苯甲酸酯的持续释放比自由分散到包衣介质中的对羟基苯甲酸酯的释放明显慢。这种活性包装对鼠伤寒沙门氏菌，大肠埃希菌，单核细胞增生性李斯特菌和日本乳杆菌显示出显着的抗菌活性。在所有情况下都超过一个，从大肠杆菌的1.1到肠炎链球菌的2.6鼠伤寒。作为食品模拟物，在50％（v / v）的乙醇中进行的总体迁移测试表明，准备好的包装适合食品接触，因为迁移量低于欧盟法规规定的限制。将鲜切的卷心莴苣装入准备好的活性包装和无活性涂层的对照包装中，并在热应力条件下（即10°C）存储。感官特性和长达14天的嗜温乳酸菌的进化，总细菌数，酵母菌和霉菌均显示出对此类菌株的抑制作用。比较对照包装和活性包装中的生菜，用于中温乳酸菌，其对数值为0.24（CFU），总细菌数为1.63（CFU）。观察到关于酵母，霉菌和酵母菌数量的最显着影响。对于酵母，观察到的对数值为2.32（CFU），对于酵母和霉菌，观察到的对数值为2.5（CFU）。通过Gompertz方程，在大肠杆菌生长长达30天之后，对莴苣的保质期进行了预测。发现货架期从11天延长到16天

更新日期：2021-04-29

点击分享查看原文

点击收藏

阅读更多本刊最新论文