Degradable rGO-MoS₂-Fe₂O₃ based carboxymethyl cellulose packaging films for fruit preservation

ABSTRACT

Developing innovative packaging films is of great significance for extending the shelf-life of perishable fruit. In this study, we successfully synthesized antibacterial composites by incorporating Fe into reduced graphene oxides (rGO) and MoS₂. The resulting rGO-MoS₂-Fe₂O₃ composites demonstrated effective inhibition against E. coli and S. aureus. After investigating the antibacterial mechanism of rGO-MoS₂-Fe₂O₃ composites, we utilized carboxymethyl cellulose (CMC) as a film substrate to create CMC films infused with rGO-MoS₂-Fe₂O₃ composites. The incorporation of rGO-MoS₂-Fe₂O₃ composites decreased the light transmittance and hygroscopicity of CMC films, while greatly enhancing the mechanical properties of CMC films. To evaluate the practical applications of these rGO-MoS₂-Fe₂O₃-based CMC films, we conducted a strawberry preservation experiment, which revealed that CMC films supplemented with 5 wt% rGO-MoS₂-Fe₂O₃ exhibited exceptional performance in preventing weight loss and maintaining total titratable acidity levels in strawberries. These findings highlighted the promising potential of rGO-MoS₂-Fe₂O₃-based CMC films for fruit preservation applications.

KEYWORDS:

• rGO
• MoS₂
• food preservation
• carboxymethyl cellulose
• packaging film

Acknowledgments

We would like to say thanks to Prof. Longfeng Wang for helping us to prepare the packaging films.

Disclosure Statement

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Additional information

Funding

This work was supported by National Key R&D Program of China [2022YFC2105203], National Natural Science Foundation of China [22378196], Talent research start-up fund of Nanjing Tech University, Open Project of Henan Key Laboratory of Industrial Microbial Resources and Fermentation Technology, Nanyang Institute of Technology [HIMFT20210206], and Postgraduate Research & Practice Innovation Program of Jiangsu Province.