Colorimetric film based on polyvinyl alcohol/okra mucilage polysaccharide incorporated with rose anthocyanins for shrimp freshness monitoring.,Carbohydrate Polymers

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Colorimetric film based on polyvinyl alcohol/okra mucilage polysaccharide incorporated with rose anthocyanins for shrimp freshness monitoring.
Carbohydrate Polymers ( IF 10.7 ) Pub Date : 2019-10-13 , DOI: 10.1016/j.carbpol.2019.115402
Shaolei Kang ₁ , Hualin Wang ₂ , Li Xia ₁ , Minmin Chen ₁ , Linlin Li ₁ , Junfeng Cheng ₁ , Xingjiang Li ₃ , Shaotong Jiang ₃

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In this work, a colorimetric film was designed for shrimp freshness monitoring by incorporating rose anthocyanins (RAs) in polyvinyl alcohol/okra mucilage polysaccharide (PVA/OMP) composite film. The presence of OMP changed the film-forming solution from Newtonian to non-Newtonian fluid. The addition of OMP and RAs decreased the crystalline of PVA due to the hydrogen bonds among RAs, OMP and PVA. An appropriate content of RAs and OMP could improve the film mechanical and barrier properties. The colorimetric film showed distinguishable color changes at pH 2-12 and was high sensitive to volatile ammonia. The target film of PVA/OMP-RAs could effectively monitor shrimp freshness in real time and the color changes were easily distinguished by naked eye, suggesting its potential in intelligent packaging for freshness monitoring of aquatic products and meat foods.

中文翻译：

基于聚乙烯醇/秋葵黏液多糖和玫瑰花色苷的比色膜，用于虾的新鲜度监测。

在这项工作中，通过在聚乙烯醇/秋葵黏多糖（PVA / OMP）复合膜中掺入玫瑰花色苷（RA），设计了一种比色膜用于虾的新鲜度监测。OMP的存在将成膜溶液从牛顿流体变为非牛顿流体。由于RA，OMP和PVA之间存在氢键，OMP和RA的添加降低了PVA的结晶。适当含量的RA和OMP可以改善薄膜的机械性能和阻隔性能。比色膜在pH 2-12时显示出明显的颜色变化，并且对挥发性氨高度敏感。PVA / OMP-RAs的目标膜可以有效地实时监测虾的新鲜度，并且肉眼可以轻松辨别颜色变化，

更新日期：2019-10-14

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