活性包装
食品包装
环境友好型
纳米技术
聚合物
材料科学
制浆造纸工业
化学
食品科学
复合材料
工程类
生态学
生物
作者
Kailong Zhang,Isaac Sutton,Micholas Dean Smith,David P. Harper,Siqun Wang,Tao Wu,Mi Li
出处
期刊:iScience
[Elsevier]
日期:2023-11-15
卷期号:26 (12): 108455-108455
标识
DOI:10.1016/j.isci.2023.108455
摘要
Wood, with its inherent hierarchical structure, presents opportunities for creating eco-friendly and cost-effective alternatives to petroleum-based plastics. We introduced a top-down and polymer-free method for engineering natural balsa wood into transparent wood film, demonstrating its potential use in food packaging windows. The wood was delignified and then proceeded with 2,2,6,6-tetramethyl-1-piperidinyloxy oxidation to soften the wood structure and introduce carboxyl groups. A robust and transparent wood film was produced by drying the wood under ambient condition without the need for additional polymers or mechanical force. Curcumin was also integrated into the wood using vacuum impregnation. The functionalized wood film with curcumin (WFC) exhibited a distinguishable redness shift in alkaline conditions. We then applied the WFC as an intelligent food packaging window to sense the freshness of shrimp based on the pH-responsive color change. This study provides a simple and scalable approach for developing sustainable and smart food packaging using wood.
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