Structure and properties of starch/chitosan food packaging film containing ultra-low dosage GO with barrier and antibacterial

被引:75
作者
Wu, Lei [1 ]
Lv, Shenghua [1 ]
Wei, Dequan [1 ]
Zhang, Siran [1 ]
Zhang, Shanshan [1 ]
Li, Zexiong [1 ]
Liu, Leipeng [1 ]
He, Tingxiang [1 ]
机构
[1] Shaanxi Univ Sci & Technol, Coll Bioresources Chem & Mat Engn, Xian 710021, Peoples R China
基金
中国国家自然科学基金;
关键词
Graphene oxide (GO); Chitosan; Starch; chitosan composite film; Barrier; UV shielding; Antibacterial; GRAPHENE OXIDE; STARCH FILMS; COMPOSITE FILM; TRANSPARENT; NANOPARTICLES; FABRICATION; DISPERSION; COATINGS;
D O I
10.1016/j.foodhyd.2022.108329
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Using urea as an intermediate, graphene oxide (GO) was modified with carboxymethyl cellulose (CMC) to obtain a uniformly dispersed GO monolayer dispersion for starch/chitosan composite preparation films. The structure and properties of modified GO and starch/chitosan composite films were characterized by FTIR, XRD, and TG. It was found that the modified GO could form a single layer uniformly and stably dispersed in the starch/chitosan composite film. At low GO content (0.01 wt%), the tensile properties of the films increased by 91.7% to 62.5 MPa compared with the control group, the water vapor permeability (WVP) was low, the water resistance was good, and the UV shielding effect was maintained at 92% under 50% visible light. At the same time, the film changed from overflow antibacterial mode to contact antibacterial mode. The antibacterial ability against Escherichia coli and Staphylococcus aureus increased by 23.8% and 25.6%, respectively, compared with the control group. It has an apparent preservation ability for fresh fruit. These excellent characteristics can be widely used in food packaging and pharmaceutical fields.
引用
收藏
页数:11
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