Journal
ACS APPLIED POLYMER MATERIALS
Volume -, Issue -, Pages -Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsapm.2c01667
Keywords
porphyrinic metal-organic frameworks; polycaprolactone; photodynamic antibacterial activity; active packaging; preservation of fruits
Funding
- National Natural Science Foundation of China
- Fundamental Research Funds for the Central Universities
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province
- [21804057]
- [21804056]
- [21934002]
- [JUSRP121005]
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Food-borne diseases caused by fresh fruits and vegetables pose a serious threat to human health, necessitating effective antibacterial measures. Incorporating highly efficient photosensitive MOF-545 nanorods into PCL material to prepare antibacterial composite films has shown strong antibacterial activity under white LED light, offering a new option for antibacterial packaging of fruits and vegetables.
Food-borne diseases caused by fresh fruits and vegetables seriously threaten human health. The polycaprolactone (PCL) polymer with good biodegradability has drawn growing interest in packaging and protecting of fresh fruits and vegetables. The disadvantage of pure PCL as a packaging material is the lack of the antibacterial function. Photodynamic sterilization as a safe and effective antibacterial method is now the emerging means for food safety. Therefore, the porphyrinic metal-organic framework MOF-545 as a highly effective photosensitizer was incorporated with PCL to prepare a biodegradable antibacterial composite film. The incorporation of MOF-545 nanorods significantly enhanced the hydrophilicity and mechanical strength of the film while slightly decreasing the transparency. The PCL/MOF-545 (10%) film exhibited the strongest antibacterial activity under a white LED light. This film was used for packaging fresh-cut apples and effectively killed 96% of the microorganisms, also delaying the apples' discoloration and water loss. The PCL/MOF-545 film showed great potential for the antibacterial packaging of fruits and vegetables.
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