生物高聚物
丁香酸
纤维素
接触角
化学
香兰素酸
抗氧化剂
有机化学
热稳定性
酚酸
食品包装
阿布茨
活性包装
化学工程
材料科学
聚合物
食品科学
复合材料
DPPH
没食子酸
工程类
作者
SuriyaPrakaash Lakshmibalasubramaniam,Caitlin Howell,Mehdi Tajvidi,Denise I. Skonberg
出处
期刊:Food Chemistry
[Elsevier]
日期:2021-12-01
卷期号:374: 131773-131773
被引量:3
标识
DOI:10.1016/j.foodchem.2021.131773
摘要
Cellulose nanofibril (CNF) is a natural biodegradable biopolymer with excellent mechanical and barrier properties. However, it is susceptible to moisture-induced deterioration of its properties. Attachment of phenolic acids can improve its hydrophobicity and provide additional active functionalities such as antioxidant properties. In this study, CNF films were esterified to vanillic and syringic acid through two different reaction mechanisms. The films were investigated for evidence of modification, hydrophobicity, mechanical properties, crystallinity, thermal stability, and antioxidant properties. Results indicate that esterification with vanillic and syringic acids imparted antioxidant activity to CNF films, with a significantly higher ABTS+· scavenging activity (76 ± 18%) when compared to control CNF films (30 ± 6%). Similarly, esterification of phenolic acids significantly improved the hydrophobicity of the films with a water contact angle of 94 ± 3° when compared to control CNF films (46 ± 5°). Covalent attachment of phenolic acids can improve hydrophobicity while providing additional functionality to CNF important for food packaging applications.
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