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Synthesis of Antibacterial Nanoparticle for Packaging Food Application

Radan, Niloofar | 2021

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 55045 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Yaghmaei, Soheila; Ghobadinezhad, Zahra
  7. Abstract:
  8. Food spoilage cased by food-borne pathogens and microorganisms is a serious problem in the food and packaging industry. Then, the demand for antibacterial agents in food packaging is growing. The antibacterial efficacy of some nanocomposites has been recognized and exploited in various industries, including the packaging industry. Also, metal organic frameworks due to their porous structure, are used in various fields such as food packaging. The purpose of this work, is synthesize hybrid nanocomposite that have promising antibacterial activity for preparation of food packaging films. Carboxymethyl cellulose is a derivative of cellulose fiber. The use of carboxymethyl cellulose as antibacterial carrier or substrate is attractive in light of their biocompatibility, thermal stability and functionalized surface. ZIF-8 have been studied due to their inherent antibacterial activity and stability of chemical and physical properties. Also, silver nanoparticle was added to ZIF-8 to increase antibacterial performance. Then, the films were fabricated by solution casting. The synthesized nanostructure was characterized by SEM, EDX, XRD and FTIR. In the first step of this study, bactericidal activity and inhibition growth of Escherichia coli and Staphylococcus aureus were investigated by nanocomposite and films. In the second step, the storage of strawberries by synthesized films were investigated. As the results illustrated, AgNPs@ZIF-8@CMC composite has the best antibacterial activities compared to another nanocomposites. Also, 4%(AgNPs@ZIF-8@CMC)-Gel/Chi and 8%(AgNPs@ZIF-8@CMC)-Gel/Chi films respectively, after 3 hours contact with E. coli and S. aureus had 100% bactericidal effect. Finally, the result of storage the strawberries show that the 8%(AgNPs@ZIF-8@CMC)-Gel/Chi film keeps them fresh, healthy and without any stains and fungi after 5 days
  9. Keywords:
  10. Antibacterials ; Staphylococcus Aureus ; Metal-Organic Framework ; Escherichia Coli Bacteria ; Silver Nanoparticles ; Nanoparticle Synthesis ; Packaging Food

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