Antimicrobial bio-nanocomposite films based on gelatin, tragacanth, and zinc oxide nanoparticles – Microstructural, mechanical, thermo-physical, and barrier properties
| Autor: | Hamed Hamishehkar, Akram Pezeshki, Sanaz Karimi, Maryam Mohammadi, Raman Ahmadi, Rahim Shahvalizadeh, Mahdi Rahimi, Seyed Amir Seyed Moslemi, Iskandar Davandeh |
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| Rok vydání: | 2021 |
| Předmět: |
Staphylococcus aureus
food.ingredient Materials science Color Metal Nanoparticles Nanoparticle chemistry.chemical_element Zinc Gelatin Permeability Nanocomposites Analytical Chemistry chemistry.chemical_compound Crystallinity food Anti-Infective Agents Tensile Strength Ultimate tensile strength Escherichia coli Nanocomposite Calorimetry Differential Scanning Tragacanth Food Packaging Water General Medicine Antimicrobial Chemical engineering chemistry Zinc Oxide Food Science |
| Zdroj: | Food Chemistry. 354:129492 |
| ISSN: | 0308-8146 |
| DOI: | 10.1016/j.foodchem.2021.129492 |
| Popis: | Gelatin and tragacanth were employed to fabricate antimicrobial nanocomposites with 1, 3, and 5% zinc oxide nanoparticles (ZnO-NPs). FT-IR and XRD proved new chemical interactions among GEL/TGC/ZnO-NPs and higher crystallinity of nanocomposites, respectively. DSC showed a significant increase in melting point temperature (Tm) from ~ 90 to ~ 93–101 °C after adding 1–5% ZnO-NPs. Ultimate tensile strength (UTS) was remarkably increased to 31.21, 34.57, and 35.06 MPa, as well as Young’s Modulus to 287.44, 335.47, and 367.04 MPa after incorporating 1, 3, and 5% ZnO-NPs. The ZnO-NPs dose-dependently reduced the water vapor permeability (WVP) of the films. FE-SEM analysis from surface and cross-section illustrated the compact and homogenous structure of the nanocomposites even up to 5% ZnO-NPs. The ZnO-NPs-containing nanocomposites had a good antimicrobial activity (~10–20 mm) against both Staphylococcus aureus and Escherichia coli. Generally, the results indicated that the prepared nanocomposite films are promising antimicrobial bio-materials for food packaging. |
| Databáze: | OpenAIRE |
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