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Effect of nanoparticles type and content on the antimicrobial activity of magnetoelectric polymer-based composites

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Resumo:Antimicrobial materials are essential for the development of coatings for high traffic surfaces to prevent the adhesion and proliferation of microorganisms, playing a crucial role in infection control. In this study, different magnetoelectric nanocomposites exhibiting antimicrobial activity upon magnetic stimulation were developed by solvent casting. The nanocomposites, composed of poly(vinylidene fluoride-co-trifluoroethylene) [P(VDF-TrFE)] with different contents (10 and 20% wt) of CoFe2O4 (CFO) or Fe3O4 nanoparticles, were developed to respond to a variable magnetic field, mechanically stimulating the piezoelectric component of the material and inducing surface potential variations. The antimicrobial properties of these materials were evaluated by exposing them to different magnetic frequencies (0.3 and 1 Hz) in a custom-made magnetic bioreactor. The growth of Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) was significantly inhibited, particularly in the P(VDF-TrFE) nanocomposite with 20% CFO NPs, under magnetic stimulation at 1 Hz (bacterial cell viability ≈15%) compared to static conditions (bacterial cell viability ≈35%). This study highlights the potential of magnetic stimulation, in combination with magnetoelectric materials, as an effective strategy for the development of antimicrobial surfaces.
Autores principais:Moreira, Joana Catarina Dias
Outros Autores:Fernandes, Margarida M; Correia, Vitor; Correia, Daniela M.; Tubio, Carmen R; Lazic, Vesna; Lanceros-Mendez, S.
Assunto:Bacteria Cells Electrostatics Membranes Piezoelectrics
Ano:2026
País:Portugal
Tipo de documento:artigo
Tipo de acesso:acesso aberto
Instituição associada:Universidade do Minho
Idioma:inglês
Origem:RepositóriUM - Universidade do Minho

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