Development and characterization of novel antimicrobial bilayer films based on Polylactic acid (PLA)/Pickering emulsions
Development and characterization of novel antimicrobial bilayer films based on Polylactic acid (PLA)/Pickering emulsions
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基于聚乳酸 (PLA)/Pickering 乳液的新型抗菌双层薄膜的开发和表征
DOI：
10.1016/j.carbpol.2017.11.085
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发表时间：
2018
影响因子：
11.2
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
可生物降解食品包装具有可持续性，应用前景广阔。PLA是石油衍生聚合物的有前途的替代品。然而，与石油衍生的包装相比，PLA包装具有较差的阻隔性能。为了解决这个问题，我们设计了基于PLA和Pickering乳液的双层膜。所形成的双层膜致密均匀，双层结合牢固。这种策略提高了Pickering乳液膜的机械阻力，延展性和防潮性，并伴随着提高聚乳酸膜的氧气阻隔性。百里酚负载在皮克林乳液层赋予他们的抗菌和抗氧化活性。释放曲线符合Fick第二定律。薄膜的抑菌性能与薄膜类型有关，Pickering乳液层的抑菌圈大于PLA层，表明薄膜具有定向释放作用。这项研究开辟了一个有前途的路线，制造双层结构，创造协同作用的每一层。
Biodegradable food packaging is sustainable and has a great application prospect. PLA is a promising alternative for petroleum-derived polymers. However, PLA packaging suffers from poor barrier properties compared with petroleum-derived ones. To address this issue, we designed bilayer films based on PLA and Pickering emulsions. The formed bilayer films were compact and uniform and double layers were combined firmly. This strategy enhanced mechanical resistance, ductility and moisture barrier of Pickering emulsion films, and concomitantly enhanced the oxygen barrier for PLA films. Thymol loadings in Pickering emulsion layer endowed them with antimicrobial and antioxidant activity. The release profile of thymol was well fitted with Fick’s second law. The antimicrobial activity of the films depended on film types, and Pickering emulsion 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 architecture creating synergism of each layer.