Highly Antibacterial and Antioxidative Carbon Nanodots/Silk Fibroin Films for Fruit Preservation.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 38091579.
- Also identified by DOI 10.1021/acs.nanolett.3c03621.
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Abstract
The issues of fruit waste and safety resulting from rot have spurred a demand for improved packaging systems. Herein, we present highly antibacterial and antioxidative carbon nanodot/silk fibroin (CD/SF) films for fruit preservation. The films are composed of CDs and SF together with a small amount of glycerol via hydrogen bonding, exhibiting outstanding biosafety, transparency, and stretchability. The films effectively integrate key functionalities (atmosphere control, resistance to food-borne pathogens, and antioxidation properties) and can be manufactured in large sizes (about 20 × 30 cm), boasting a transmission rate of 13 183 cm<sup>3</sup>/m<sup>2</sup>·day for oxygen and 2860 g/m<sup>2</sup>·day for water vapor, favoring the preservation of fresh fruits. A convenient dip-coating method enables <i>in situ</i> fabrication of films with a thickness of approximately 14 μm directly on the fruits' surface providing comprehensive protection. Importantly, the films are washable and biodegradable. This work presents a promising technology to produce multifunctional and eco-friendly antibacterial packaging systems.