黄檀
壳聚糖
化学工程
葡甘露聚糖
透氧性
材料科学
食品包装
活性包装
单宁酸
极限抗拉强度
虫胶
Zeta电位
阳离子聚合
逐层
化学
复合材料
高分子化学
图层(电子)
纳米技术
食品科学
有机化学
涂层
氧气
纳米颗粒
工程类
作者
Ruojun Mu,Nitong Bu,Yi Yuan,Jie Pang,Chen Ma,Lin Wang
标识
DOI:10.1016/j.ijbiomac.2023.125100
摘要
Constructing biodegradable food packaging with good mechanics, gas barrier and antibacterial properties to maintain food quality is still challenge. In this work, mussel-inspired bio-interface emerged as a tool for constructing functional multilayer films. Konjac glucomannan (KGM) and tragacanth gum (TG) with physical entangled network are introduced in the core layer. Cationic polypeptide ε-polylysine (ε-PLL) and chitosan (CS) producing cationic-π interaction with adjacent aromatic residues in tannic acid (TA) are introduced in the two-sided outer layer. The triple-layer film mimics the mussel adhesive bio-interface, where cationic residues in outer layers interact with negatively charged TG in the core layer. Furthermore, a series of physical tests showed excellent performance of triple-layer film with great mechanical properties (tensile strength (TS): 21.4 MPa, elongation at break (EAB): 7.9 %), UV-shielding (almost 0 % UV transmittance), thermal stability, water, and oxygen barrier (oxygen permeability (OP): 1.14 × 10-3 g/m s Pa and water vapor permeability (WVP): 2.15 g mm/m2 day kPa). In addition, the triple-layer film demonstrated advanced degradability, antimicrobial functions, and presented good moisture-proof performance for crackers, which can be potentially applied as dry food packaging.
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