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Cellulose nanofiber-based ethylene scavenging antimicrobial films incorporated with various types of titanium dioxide nanoparticles to extend the shelf life of fruits

Riahi, Z ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1021/acsapm.2c00338
  3. Publisher: American Chemical Society , 2022
  4. Abstract:
  5. TiO2 nanotubes (TNTs) were synthesized hydrothermally and modified by Cu2O using a sol-gel method to provide photocatalytic activity in visible light. Cellulose nanofiber (CNF)-based films were prepared by adding TiO2, TNTs, and Cu2O-modified TNT (TNT-Cu2O). The TiO2-based nanoparticles (TiO2, TNTs, and TNT-Cu2O) were uniformly distributed in the base polymer to make compatible and flexible films. The incorporation of nanoparticles significantly enhanced the UV-shielding properties of the film while slightly decreasing the transparency. Incorporating nanofillers improved the film's mechanical and water resistance properties depending on the nanoparticle type. The TNT-Cu2O-added CNF film (CNF/TNT-Cu2O) showed the strongest antibacterial activity in visible light, followed by CNF/TNT and CNF/TiO2 films. The CNF-based films were used for tomato packaging to evaluate the ethylene scavenging property of the films. The CNF/TNT-Cu2O film scavenged ethylene gas produced in the headspace during storage, delaying the tomatoes' discoloration, softening, and weight loss. CNF/TNT-Cu2O films are expected to be excellent composite films for the active packaging application of fruits and vegetables. © 2022 American Chemical Society
  6. Keywords:
  7. Active packaging ; Antibacterial ; CNF ; TiO2 ; TNT-Cu2O ; Cellulose films ; Copper oxides ; Ethylene ; Nanocellulose ; Nanocomposite films ; Nanofibers ; Photocatalytic activity ; Polymer films ; Sol-gel process ; Sol-gels ; TiO2 nanoparticles ; Active packaging ; Antibacterials ; Antimicrobial films ; Cellulose nanofibers ; Cu2O films ; Ethylene scavenging ; Tio2 nanotube-cu2O ; TiO2 nanotubes ; Titanium dioxide nanoparticles ; Visible light ; Titanium dioxide ; Discoloration ; Film ; Fruits ; Light ; Packaging ; Shelf Life ; Transparence
  8. Source: ACS Applied Polymer Materials ; Volume 4, Issue 7 , 2022 , Pages 4765-4773 ; 26376105 (ISSN)
  9. URL: https://pubs.acs.org/doi/10.1021/acsapm.2c00338