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| Preparation and Characterization of Carbon Dots/Cellulose Nanofiber Composite Films |
| Received:November 30, 2022 |
| DOI：DOI：10.11980/j.issn.0254-508X.2023.03.010 |
| Key Words:cellulose nanofiber carbon dots anti-bacterial anti-oxidation fresh |
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| Abstract:Carbon dots （CDs） were synthesized by hydrothermal method using sodium isoascorbate as carbon source， and a new type of antibacterial nano materials. Then CDs/CNF composite films were prepared by blending with cellulose nanofiber （CNF） and CDs. The results showed that the average particle size of CDs was （4.6±1.8） nm. The addition of CDs could improve the UV barrier properties and ductility of composite films， and the antibacterial and anti-oxidation properties of composite films were positively correlated with the content of CDs. However， a high content of CDs finally decreased the hydrophobicity of the composite films as well as the tensile strength. The antibacterial diameters of the composite films containing 7% CDs against E. coli and S. aureus reached 16.88 mm and 14.34 mm respectively. The CDs/CNF composite coatings could delay the decay of strawberry in a subsequent application verification. |
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