聚乳酸
环境友好型
食品包装
淀粉
食品科学
材料科学
化学
复合材料
聚合物
生物
生态学
作者
Marcela María Godoy Zúniga,Ruonan Ding,Eunyoung Oh,Tinh Nguyen,Tien Tran Trung,Jae‐Do Nam,Jonghwan Suhr
标识
DOI:10.1016/j.ijbiomac.2024.130837
摘要
Efficient and effective use of biopolymers, such as starch, has increasingly prompted interest due to the current environmental challenges. However, starch-based composites still show poor ductility along with water and oxygen permeability, which may not meet the requirements for food packaging standards. In this study, modified starch (m-St), isolated from the avocado seed and synthesized with tert-butyl acetoacetate (t-BAA), was embedded into polylactic acid (PLA) to design new eco-friendly composites. The developed biocomposites were found to exhibit high performance with outstanding mechanical properties in conjunction with remarkable light, water vapor, and oxygen blocking features for food packaging applications. PLA/m-St(1:6) 20 wt% composites showed a dramatic increase in elongation at break (EB%) from 3.35 to 27.80 % (about 730 % enhancement) and exhibited remarkable UV-blocking performance from 16.21 to 83.86 % for UVB, relative to pure PLA. Equally importantly, these biocomposites revealed significant improvement in oxygen and water vapor barrier performance by reducing their values from 1331 to 32.9 cc m−2 day−1 (indicating a remarkable reduction of 97.53 %) and 61.9 to 28 g m−2 day−1, respectively. This study can show the great potential of extracting starch from biowaste resources and transforming it into sustainable bio-based composites as a promising solution for food packaging applications.
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