Blends of gellan gum/xanthan gum/zinc oxide based nanocomposites for packaging application: Rheological and antimicrobial properties
| Autor: | Balasubramanian Rukmanikrishnan, Ranjith Kumar Manoharan, Sam Soo Kim, Fathima Rigana Mohamed Ismail, Jaewoong Lee |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
chemistry.chemical_element Biocompatible Materials 02 engineering and technology Zinc Biochemistry Nanocomposites Contact angle 03 medical and health sciences chemistry.chemical_compound X-Ray Diffraction Structural Biology Spectroscopy Fourier Transform Infrared Ultimate tensile strength medicine Thermal stability Molecular Biology 030304 developmental biology 0303 health sciences Nanocomposite Polysaccharides Bacterial Food Packaging General Medicine 021001 nanoscience & nanotechnology Gellan gum Chemical engineering chemistry Zinc Oxide Rheology 0210 nano-technology Glass transition Xanthan gum medicine.drug |
| Zdroj: | International Journal of Biological Macromolecules. 148:1182-1189 |
| ISSN: | 0141-8130 |
| DOI: | 10.1016/j.ijbiomac.2019.11.155 |
| Popis: | Gellan (G) and xanthan gum (X) based nanocomposites containing zinc oxide (Z) nanoparticles (NPs) were fabricated. The effect of zinc oxide on the structure, morphology, and rheological properties of GX composite films were studied. The prepared nanocomposites exhibited shear thinning behavior and a decrease in viscosity when the shear rate was increased. The storage and loss modulus of the GXZ nanocomposites increased with increased zinc oxide percentage and frequency. There was a decrease in complex viscosity at high frequency. The tensile strength (22.1–35.5 MPa), thermal stability (T5%-82.5–96.2 °C), and glass transition temperature (69.9–74.8 °C) of the nanocomposite films increased with the addition of zinc oxide NPs. The results showed that the incorporation of zinc oxide NPs increased the contact angle (54.1–60.8o) and decreased the water vapor permeability (3.83–2.31 × 10−9 g/m2 Pas) of the nanocomposites, indicating a decrease in hydrophilicity. The GXZ nanocomposite films exhibited higher ultra-violet light shielding, and superior thermal and water barrier properties than the GX composite film. Based on these results, GXZ composite films could make a beneficial contribution to food and pharmaceutical packaging applications. |
| Databáze: | OpenAIRE |
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