Structure and properties of starch/chitosan food packaging film containing ultra-low dosage GO with barrier and antibacterial. (April 2023)

• Record Type: Journal Article
• Authors: Wu, Lei; Lv, Shenghua; Wei, Dequan; Zhang, Siran; Zhang, Shanshan; Li, Zexiong; Liu, Leipeng; He, Tingxiang
• Is Part Of: Food hydrocolloids. Volume 137(2023)
• Publication Date: 2023-04
• Subjects: Graphene oxide (GO) -- Chitosan -- Starch/chitosan composite film -- Barrier -- UV shielding -- Antibacterial; Hydrocolloids -- Periodicals; Food additives -- Periodicals; Colloïdes -- Périodiques; Aliments -- Additifs -- Périodiques; Colloids; Food additives; Periodicals; Electronic journals; 664.06
• DOI: 10.1016/j.foodhyd.2022.108329
• Languages: English
• ISSNs: 0268-005X

Abstract

Abstract: 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. Graphical abstract: Image 1 Highlights: GO was modified by CMC and urea to obtain CMC-urea-GO composite for dispering GO. A functional film was prepared by mixing modified starch, chitosan and 0.01% dosage GO. Starch/chitosan/GC film has good barrier, antibacterial and anti-ultraviolet properties. Starch/chitosan/GC film can shield 92% UV under 50% visible light transmittance.