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首页> 外文期刊>Journal of Applied Polymer Science >Polylactide films produced with bixin and acetyl tributyl citrate: Functional properties for active packaging
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Polylactide films produced with bixin and acetyl tributyl citrate: Functional properties for active packaging

机译：用柠檬酸苄啶和乙酰基丁基乙酸乙酰苯乙酸酯生产的聚丙酯薄膜：活性包装的功能性

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摘要

Packaging materials are decisive to preserve the quality and nutritional value of food. Polylactide (PLA) is a biodegradable polymer with adequate mechanical properties for packaging applications, but its moderate oxygen barrier properties and high UV light transmission hamper its performance as packaging for oxygen- and light-sensitive products. Bixin, a carotenoid with coloring and antioxidant character, was used to improve the light barrier of PLA films plasticized or not with acetyl tri-butyl citrate (ATBC). The films were subjected to thermal treatment mimicking polymer processing temperatures. Despite more than 74 wt% of bixin degraded during heat treatment, films were still blocking up to 95% of UVA and 90% of UVB transmission. Plasticizing PLA with ATBC accelerated up to six times the bixin release into a food simulant, which allowed to reach relevant concentrations for food preservation. In conclusion, bixin is a promising natural antioxidant and UV-shielding additive of biodegradable packaging.
机译：包装材料对于保持食品的质量和营养价值至关重要。聚乳酸（PLA）是一种可生物降解的聚合物，具有足够的机械性能，可用于包装应用，但其适度的氧阻隔性能和高紫外线透射率阻碍了其作为氧气和光敏产品包装的性能。Bixin是一种具有着色和抗氧化特性的类胡萝卜素，用于改善乙酰柠檬酸三丁酯（ATBC）增塑或未增塑PLA膜的光阻隔性。薄膜经过模拟聚合物加工温度的热处理。尽管在热处理过程中，超过74 wt%的bixin降解，但薄膜仍阻挡了高达95%的UVA和90%的UVB传输。用ATBC塑化聚乳酸，可加速比辛释放到食品模拟物中的速度高出六倍，从而达到食品保存的相关浓度。综上所述，碧欣是一种很有前途的可生物降解包装用天然抗氧化剂和紫外线屏蔽添加剂。

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