Morphological, physical, antimicrobial and release properties of ZnO nanoparticles-loaded bacterial cellulose films.
Bacterial cellulose (BC) monolayer and multilayer films, incorporating 5wt.% ZnO nanoparticles (NPs) have been obtained. Ultrasound (US) irradiation (40kHz) was applied during ZnO-BC nanocomposites preparation. X-ray diffraction (XRD) patterns showed that ZnO NPs were crystallized in their pure phase. SEM scanning electron microscopy (SEM) results indicated that US treatment causes to decrease ZnO particle size, forming a stable hybrid nanostructure and evenly distributed ZnO NPs coated BC nanofibers. ZnO NPs enhanced the mechanical properties and diminished water vapor permeability and moisture absorption of BC films. Antibacterial activity of ZnO-BC films against Staphylococcus aureus was more than Escherichia coli. The antibacterial activity was enhanced with the utilization of US irradiation. The ZnO release was influenced by films composition; the multilayer and US treated films being promising in order to achieve controlled release of ZnO. Results suggest that ZnO-BC films may be used as controlled release antimicrobial food active packaging.
Department of Food Science and Technology, College of Agriculture, Tabriz Branch, Islamic Azad University, Tabriz, Iran.
Fereshteh
F
Shahmohammadi Jebel
Department of Food Science and Technology, Faculty of Agriculture, Urmia University, P.O. Box 57561-51818, Urmia, Iran. Electronic address: h.almasi@urmia.ac.ir.
Hadi
H
Almasi
D000900:Anti-Bacterial Agents / Q000737:chemistry* / Q000494:pharmacology*; D002482:Cellulose / Q000737:chemistry*; D004337:Drug Carriers / Q000737:chemistry*; D065546:Drug Liberation; D019453:Escherichia coli O157 / Q000187:drug effects; D055595:Mechanical Phenomena; D053761:Nanocomposites / Q000737:chemistry; D010316:Particle Size; D013211:Staphylococcus aureus / Q000187:drug effects; D015034:Zinc Oxide / Q000737:chemistry* / Q000494:pharmacology*
D000900:Anti-Bacterial Agents; D004337:Drug Carriers; D002482:Cellulose; D015034:Zinc Oxide
Antibacterial activity; Bacterial cellulose; Calcium nitrite (PubChem CID: 159695); Calcium sulphate (PubChem CID: 24497); Controlled release; Morphology; Potassium sulphate (PubChem CID: 24507); Sodium hydroxide (PubChem CID: 14798); Ultrasound irradiation; ZnO nanoparticles