聚乳酸
甲壳素
抗氧化剂
纳米晶
食品包装
材料科学
水解
DPPH
活性包装
化学工程
纳米技术
食品科学
化学
有机化学
壳聚糖
复合材料
聚合物
工程类
作者
Murat Yanat,Ivanna Colijn,Karin Schroën
出处
期刊:Polymers
[MDPI AG]
日期:2022-07-21
卷期号:14 (14): 2965-2965
被引量:1
标识
DOI:10.3390/polym14142965
摘要
About 1/3rd of produced food goes to waste, and amongst others, advanced packaging concepts need to be developed to prevent this from happening. Here, we target the antioxidative functionality of food packaging to thus address food oxidation without the need for the addition of antioxidants to the food product, which is not desirable from a consumer point of view. Chitin nanocrystals (ChNC) have been shown to be promising bio-fillers for improving the mechanical strength of biodegradable plastics, but their potential as active components in plastic films is rather unexplored. In the current study, we investigate the antioxidant activity of chitin nanocrystals as such and as part of polylactic acid (PLA) films. This investigation was conducted using DPPH (1,1-diphenyl-2-picrylhydrazyl) radical scavenging activity. Chitin nanocrystals produced via acid hydrolysis showed five times higher activity compared to crude chitin powder. When using these crystals as part of a polylactic acid film (either inside or on top), in both scenarios, antioxidant activity was found, but the effect was considerably greater when the particles were at the surface of the film. This is an important proof of the principle that it is possible to create biodegradable plastics with additional functionality through the addition of ChNC.
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