Development and characterisation of polylactic acid-gliadin bilayer/trilayer films as carriers of thymol
Development and characterisation of polylactic acid-gliadin bilayer/trilayer films as carriers of thymol
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作为百里酚载体的聚乳酸-麦醇溶蛋白双层/三层膜的开发和表征
DOI：
10.1111/ijfs.13634
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发表时间：
2018
影响因子：
3.3
通讯作者：
Yang Xiao-Quan
中科院分区：
文献类型：
--
作者：
Zhu Jun-You;Tang Chuan-He;Yin Shou-Wei;Yang Xiao-Quan
可生物降解的食品包装承诺了一个更可持续的未来。聚乳酸是一种很有前途的石油衍生聚合物替代品。然而，与石油衍生的聚乳酸薄膜相比，聚乳酸薄膜的阻隔性能较差。为了解决这个问题，我们设计了基于聚乳酸和醇溶蛋白的双层和三明治结构的三层膜。首次报道了不经表面修饰直接在聚乳酸薄膜上形成聚乳酸-醇溶蛋白双层/三层膜。薄膜致密均匀，双层/三层结合牢固，防止了分层。这一策略提高了醇溶蛋白薄膜的机械阻力、延展性和防潮性，同时也增强了聚乳酸薄膜的氧屏障。百里香酚的负载使双层/三层膜具有抗菌和抗氧化活性。膜的抗菌活性与膜的类型有关，醇溶蛋白膜的抑制区大于聚乳酸膜，表明膜具有定向释放作用。这项研究为构建双层/三层结构开辟了一条很有希望的途径，有助于创造生物聚合物的协同效应。
Biodegradable food packaging promises a more sustainable future. Poly(lactic acid) (PLA) is a promising alternative for petroleum-derived polymers. However, PLA films suffer from poor barrier properties compared with petroleum-derived ones. To address this issue, we designed bilayer and sandwich-architectured trilayer films based on PLA and gliadin. We reported firstly the direct formation of PLA–gliadin bilayer/trilayer films without surface modification on PLA film. The films were compact and uniform, and double/triple layers were combined firmly, preventing delamination. This strategy enhanced mechanical resistance, ductility and moisture barrier of gliadin films and concomitantly enhanced the oxygen barrier for PLA films. Thymol loadings endowed bilayer/trilayer films with antimicrobial activity and antioxidant activity. The antimicrobial activity of the films depended on film types, and gliadin layer presented larger inhibition zone than PLA layer, hinting that the films possessed directional releasing role. This study opens a promising route to fabricate bilayer/trilayer architecture helping to create synergism of the biopolymers.