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首页> 美国卫生研究院文献>Materials >Sodium Alginate-Based Green Packaging Films Functionalized by Guava Leaf Extracts and Their Bioactivities
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Sodium Alginate-Based Green Packaging Films Functionalized by Guava Leaf Extracts and Their Bioactivities

机译：番石榴叶提取物功能化的基于海藻酸钠的绿色包装膜及其生物活性

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摘要

The aim of this work was to develop green and bioactive films with sodium alginate incorporating guava leaf extracts. Seven formulations were performed with a different sodium alginate: Guava leaf water extract (WE)/ethanolic extract (EE) proportions (100:0, 90:10, 85:15, 80:20), and glycerol were used as a plasticizer. The HPLC-PDA analysis showed the main phenolic compounds in WE were gallic acid, ellagic acid, quercetin-3-O-β-D-xylopyranoside, avicularin and quercetin. The main polyphenols in EE were rutin, isoquercitrin, quercetin-3-O-β-D-xylopyranoside, avicularin, quercitrin, quercetin and kaempferol. Guava leaf extracts could greatly enhance the antioxidant activity, antibacterial activity, tensile strength and water solubility of the sodium alginate film as well as the water barrier property, while inducing a decrease in the moisture content and elongation at the break. The FTIR and SEM analyses indicated that intermolecular hydrogen bonding between the guava leaf extract and sodium alginate resulted in a more compact structure in the composite films. These results indicated that sodium alginate-guava leaf extract films might be developed into antiradical and antimicrobial food packaging materials.
机译：这项工作的目的是用藻酸钠掺入番石榴叶提取物开发绿色和生物活性薄膜。用不同的藻酸钠进行了7种配方：番石榴叶水提取物（WE）/乙醇提取物（EE）比例（100：0、90：10、85：15、80：20），甘油用作增塑剂。 HPLC-PDA分析表明，WE中的主要酚类化合物为没食子酸，鞣花酸，槲皮素-3-O-β-D-吡喃吡喃糖苷，阿维特林和槲皮素。 EE中的主要多酚为芦丁，异槲皮苷，槲皮素-3-O-β-D-吡喃吡喃糖苷，阿维特林，槲皮素，槲皮素和山emp酚。番石榴叶提取物可以极大地增强藻酸钠薄膜的抗氧化活性，抗菌活性，抗张强度和水溶性以及阻水性能，同时诱导水分含量的下降和断裂伸长率。 FTIR和SEM分析表明，番石榴叶提取物和藻酸钠之间的分子间氢键导致复合膜中的结构更致密。这些结果表明海藻酸钠-番石榴叶提取物薄膜可能会发展为抗自由基和抗菌食品包装材料。

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