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首页> 外文期刊>Polymers >Poplar Hot Water Extract Enhances Barrier and Antioxidant Properties of Chitosan/Bentonite Composite Film for Packaging Applications
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Poplar Hot Water Extract Enhances Barrier and Antioxidant Properties of Chitosan/Bentonite Composite Film for Packaging Applications

机译：杨树热水提取物增强了壳聚糖/膨润土复合膜在包装应用中的阻隔和抗氧化性能

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摘要

Herein, the chitosan-based (CS) composite film was fabricated via a simple and efficient blending approach by adding poplar hot water extract (HWE), bentonite (BT) and chitosan. The addition of HWE largely improved the UV blocking ability and antioxidant properties of the resultant composite film, and simultaneously a tortuous path was constructed within the chitosan matrix to enhance the water vapor and oxygen barriers after the addition of BT. Specially, the content of HWE at 10 wt % gave a greatly decreased UV light transmittance at 280 nm to the CS-BT-HWE composite film that was 99.36% lower than that of CS-BT film, and the oxidation resistance was 9.65 times higher than that of CS-BT. The mechanical properties and surface morphological observation evaluated by scanning electron microscopy (SEM) and scanning probe microscope (SPM) confirmed the film had a denser structure. The internal chemical structure analyzed using solid state NMR, FTIR and X-ray spectra exhibited the resultant Maillard structure and strong hydrogen bonding that contributed to the improved mechanical properties. Overall, the as-prepared composite film has great potential as food packaging materials, and also provides a high-efficient utilization pathway for HWE.
机译：在本文中，通过添加杨树热水提取物（HWE），膨润土（BT）和壳聚糖，通过简单有效的混合方法制备了基于壳聚糖的（CS）复合膜。加入HWE大大改善了所得复合膜的紫外线阻断能力和抗氧化性能，同时在壳聚糖基质内构建了曲折路径，以增强加入BT后的水蒸气和氧气屏障。特别地，HWE的含量为10 wt％时，CS-BT-HWE复合膜在280 nm处的紫外线透射率大大降低，比CS-BT膜低99.36％，抗氧化性提高了9.65倍比CS-BT的通过扫描电子显微镜（SEM）和扫描探针显微镜（SPM）评估的机械性能和表面形态观察证实该膜具有致密的结构。使用固态NMR，FTIR和X射线光谱分析的内部化学结构显示出所得的美拉德结构和牢固的氢键，有助于改善机械性能。总体而言，所制备的复合膜具有作为食品包装材料的巨大潜力，并且还为HWE提供了高效的利用途径。

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