Antiviral leather: A functional coating based on SiO2-AgNPs to eliminate pathogens

Author(s)

Marques, Gleison N. ; Reis, Roberta Y. N. ; Ribeiro, Lara K. ; Simoes, Luiz G. P. ; Minozzi, Daniel T. ; Andres, Juan ; Assis, Marcelo ; Mascaro, Lucia H. ; Longo, Elson

• Document type: Journal article
• Source: JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING; v. 11, n. 5, p. 8-pg., 2023-10-01.

Abstract

A bovine leather material functionalized with SiO2-Ag nanoparticles (NPs) composite, which possesses highly efficient antimicrobial activity against the SARS-CoV-2 virus and Staphylococcus aureus (S. aureus) bacteria, has been developed. The characterization of this material was conducted using scanning and transmission electron microscopy (SEM and TEM), energy dispersive X-ray spectrometry (EDS), atomic force microscopy (AFM), Fourier-transform infrared spectroscopy (FTIR), and x-ray photoelectron spectroscopy (XPS). The immobilization of SiO2-AgNPs within the collagen fibers of the leather resulted in surface modification, leading to an increase in material roughness (from 8.93 nm +/- 1.55-12.36 nm +/- 1.76 nm) and the contact angle (from 76 degrees to 81 degrees) of the SiO2-AgNPs coated leather. This functionalized leather exhibited an impressive efficacy of 99.93% against SARSCoV-2% and 99.99% against S. aureus, attributed to the oxidizing properties of the Ag NPs and the enhanced production of reactive oxygen species (ROS). These results highlight that the immobilization of SiO2-AgNPs on the surface of bovine leather is an simple, effective and low-cost strategy for obtaining new surfaces with high antimicrobial activity. (AU)

• FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
• Grantee: Elson Longo da Silva
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
• FAPESP's process: 21/06128-5 - Study of antiviral activity against SARS-CoV-2 OF copper nanoparticles and copper oxide supported in kefiran
• Grantee: Gleison Neres Marques
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 21/11326-0 - Study of copper and copper oxide photoelectrodes for wastewater treatment after the COVID-19 pandemic
• Grantee: Roberta Yonara Nascimento Reis
• Support Opportunities: Scholarships in Brazil - Doctorate