Obtenção e caracterização de fibras poliméricas de AgNPs-CMC/PVA empregando Ecovio® por eletrofiação biaxial para testes de atividade antimicrobiana e catalítica

Abstract

With the rise of nanotechnology, science has been able to go deeper and deeper into matter, discovering new ways to manipulate and modify it. With this development, it is possible to obtain structures in nanometric dimensions with unique properties, such as silver nanoparticles (AgNPs). Another material that has undergone great development with the advancement of nanotechnology are the fibers produced from the electrospinning technique, capable of producing materials with different structures and properties, from different compounds, especially polymers such as poly(vinyl alcohol) (PVA) , carboxymethylcellulose (CMC) and Ecovio®. Therefore, the objective of this work is to obtain and characterize electrospun fibers of AgNPs-CMC/PVA/Ecovio® by biaxial electrospinning for antimicrobial and catalytic activity tests. The synthesis of AgNPs-CMC was carried out using a green method using CMC as a stabilizing agent, the purification of the nanoparticles was carried out by centrifugation and subjected to lyophilization, to characterize the nanoparticles, UV-Vis and TEM were used. Electrospinning was performed using the biaxial method and fiber characterization was performed using FTIR-ATR, SEM, TGA, XDR and LIBS. The catalytic activity was evaluated through the reduction of the methylene blue dye and the film that presented the best catalytic capacity was the one with 25 mg of AgNPs. For the antimicrobial activity tests, Escherichia Coli (E.c.), Pseudomonas aeruginosa (P. a.) and Staphylococcus aureus (S. a.) bacteria were used, and the growth of each one was evaluated, and Escherichia Coli (E.c.) showed the lowest growth in relation to the others.