Antimicrobial bio-nanocomposite films based on gelatin, tragacanth, and zinc oxide nanoparticles - Microstructural, mechanical, thermo-physical, and barrier properties

Rahim Shahvalizadeh; Raman Ahmadi; Iskandar Davandeh; Akram Pezeshki; Seyed Amir Seyed Moslemi; Sanaz Karimi; Mahdi Rahimi; Hamed Hamishehkar; Maryam Mohammadi

doi:10.1016/j.foodchem.2021.129492

Antimicrobial bio-nanocomposite films based on gelatin, tragacanth, and zinc oxide nanoparticles - Microstructural, mechanical, thermo-physical, and barrier properties

Food Chem. 2021 Aug 30:354:129492. doi: 10.1016/j.foodchem.2021.129492. Epub 2021 Mar 8.

Authors

Rahim Shahvalizadeh¹, Raman Ahmadi², Iskandar Davandeh³, Akram Pezeshki⁴, Seyed Amir Seyed Moslemi⁴, Sanaz Karimi⁵, Mahdi Rahimi⁶, Hamed Hamishehkar⁷, Maryam Mohammadi⁸

Affiliations

¹ Department of Food Science and Technology, Faculty of Agriculture, University of Tabriz, Tabriz, Iran; Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Immunology Research Center, and Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran.
² Department of Food Science and Technology, Faculty of Agriculture, University of Tabriz, Tabriz, Iran; Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
³ Biotechnology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
⁴ Department of Food Science and Technology, Faculty of Agriculture, University of Tabriz, Tabriz, Iran.
⁵ Department of Food Sciences, Tabriz Branch, Islamic Azad University, Tabriz, Iran.
⁶ Faculty of Chemistry, Institute of Polymer and Dye Technology, Lodz University of Technology, Lodz, Poland.
⁷ Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran. Electronic address: hamishehkarh@tbzmed.ac.ir.
⁸ Department of Food Science and Technology, Faculty of Agriculture, University of Tabriz, Tabriz, Iran; Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran. Electronic address: ma.mohammadi@tabrizu.ac.ir.

PMID: 33756322
DOI: 10.1016/j.foodchem.2021.129492

Abstract

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 (T_m) 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.

Keywords: Antimicrobial biomaterials; Food packaging; Gelatin nanocomposite films; Tragacanth gum; Zinc oxide.

MeSH terms

Anti-Infective Agents / chemistry*
Anti-Infective Agents / pharmacology
Calorimetry, Differential Scanning
Color
Escherichia coli / drug effects
Food Packaging / methods*
Gelatin / chemistry*
Metal Nanoparticles / chemistry
Nanocomposites / chemistry*
Nanocomposites / toxicity
Permeability / drug effects
Staphylococcus aureus / drug effects
Tensile Strength
Tragacanth / chemistry*
Water / chemistry
Zinc Oxide / chemistry*

Substances

Anti-Infective Agents
Water
Tragacanth
Gelatin
Zinc Oxide