This work evaluated the ability of an innovative and practical package label made from biobased polymers impregnated with sodium chlorite and citric acid to generate and release chlorine dioxide (ClO₂) at levels sufficient to inactivate pathogenic bacteria on packaged fresh produce. The concentrations of generated ClO₂ by these labels were dependent on the number of layers used and the inclusion of barrier layers. Release rates decreased exponentially with number of layers, providing an additional level of control. Storage temperature had no significant effect on the release of ClO₂. All labels released ClO₂ at concentrations capable of complete inactivation of Salmonella cells on TSA plates. Under low-humidity conditions, the labels reduced the levels of Salmonella on inoculated mung bean seeds by up to 2.0 log CFU/g. These results indicate that these labels can be used in a wide range of storage environments for enhancing safety and shelf-life of packaged fresh produce.

Industrial relevance

The biobased packaging labels present a commercially viable solution to the problem of controlling microbial growth on fresh produce. Due to the ease of manufacture under existing commercial coating technology, they can be produced and activated simultaneously with fresh produce packaging in the plant. These labels can be adapted to different food safety requirements by modulating the number of functional biobased layers, without or with biobased barrier layers, and label surface areas for generating the required concentration of ClO₂ at the optimal rate.

中文翻译：

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系统可行性：设计二氧化氯自生包装标签以提高新鲜农产品的安全性第二部分：溶液浇铸方法

这项工作评估了一种创新，实用的包装标签的能力，该标签由浸有亚氯酸钠和柠檬酸的生物基聚合物制成，能够产生和释放足以使包装的新鲜农产品上的致病菌失活的水平的二氧化氯（ClO ₂）。这些标记产生的ClO ₂的浓度取决于所用层数和阻挡层的夹杂物。释放速度随层数呈指数下降，从而提供了额外的控制级别。储存温度对ClO ₂的释放没有显着影响。所有标记均以能够完全灭活沙门氏菌的浓度释放ClO ₂。TSA板上的细胞。在低湿度条件下，标签将接种的绿豆种子上的沙门氏菌含量降低了2.0 log CFU / g。这些结果表明，这些标签可在广泛的存储环境中使用，以提高包装的新鲜农产品的安全性和保质期。

行业相关性

生物基包装标签为控制新鲜产品上的微生物生长问题提供了一种商业上可行的解决方案。由于在现有的商业涂层技术下易于制造，因此可以与工厂中的新鲜农产品包装同时生产和激活它们。这些标签可以通过调节功能性生物基层的数量（不带或不带生物基阻隔层）以及用于以最佳速率生成所需浓度的ClO _2的标签表面积来适应不同的食品安全要求。