| Autor: |
Dumas L; Laboratory of Materials, Macromolecules and Composites (LAMMAC), Federal University of Technology─Paraná (UTFPR), Apucarana, Paraná 86812-460, Brazil., de Souza MC; Laboratory of Materials, Macromolecules and Composites (LAMMAC), Federal University of Technology─Paraná (UTFPR), Apucarana, Paraná 86812-460, Brazil., Bonafe EG; Laboratory of Materials, Macromolecules and Composites (LAMMAC), Federal University of Technology─Paraná (UTFPR), Apucarana, Paraná 86812-460, Brazil., Martins AF; Laboratory of Materials, Macromolecules and Composites (LAMMAC), Federal University of Technology─Paraná (UTFPR), Apucarana, Paraná 86812-460, Brazil.; Department of Chemistry, Pittsburgh State University, Pittsburgh, Kansas 66762, United States., Monteiro JP; Laboratory of Materials, Macromolecules and Composites (LAMMAC), Federal University of Technology─Paraná (UTFPR), Apucarana, Paraná 86812-460, Brazil. |
| Abstrakt: |
The incorporation of bactericidal properties into textiles is a widely sought-after aspect, and silver nanoparticles (AgNPs) can be used for this. Here, we evaluate a strategy for incorporating AgNPs into a cotton fabric. For this purpose, a bactericidal textile coating based on a composite of AgNPs and kappa-carrageenan ( k -CA) was proposed. The composite was obtained by heating the silver precursor (AgNO 3 ) directly in k -CA solution for green synthesis and in situ AgNPs stabilization. Cotton substrates were added to the heated composite solution for surface impregnation and hydrogel film formation after cooling. Direct synthesis of AgNPs on a fabric was also tested. The results showed that the application of a coating based on k -CA/AgNPs composite can achieve more than twice the silver loading on the fabric surface compared to the textile subjected to direct AgNPs incorporation. Furthermore, silver release tests in water showed that higher Ag + levels were reached for k -CA/AgNPs-coated cotton. Therefore, inoculation tests with the bacteria Staphylococcus aureus (SA) using the agar diffusion method showed that samples covered with the composite resulted in significantly larger inhibition halos. This indicated that the use of the composite as a coating for cotton fabric improved its bactericidal activity against SA. |
