Evaluation of the permeability of silver nanoparticles in polymer films of sulfonated polystyrene-co-acrylic acid

[Display omitted] •Silver nanoparticles (AgNP) are electrochemically active.•Ag+ ion can diffuse across polystyrene-co-acrylic acid (StS-coAA) films.•Pt||poly-[StS-co-AA] modified electrodes are permeable to AgNP. Nanoparticulate materials exhibit interesting physicochemical properties due to its hi...

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Published in:Colloids and surfaces. A, Physicochemical and engineering aspects Physicochemical and engineering aspects, 2017-05, Vol.520, p.78-84
Main Authors: da Silva Paula, Marcos Marques, de Souza, Helton Jeremias, Búrigo, Carina, Langbehn, Jamile Thön, Baesso, Alice Scarabelot, da Silva, Luciano, da Silva, Paulo Roberto Paes, Benavides, Roberto, Alonso-Núñez, Gabriel, Collins, Virginia
Format: Article
Language:English
Subjects:
Acrylic acid
Diffusion
Polymeric membranes
Polystyrene sulfonated
Silver nanoparticles
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Summary:[Display omitted] •Silver nanoparticles (AgNP) are electrochemically active.•Ag+ ion can diffuse across polystyrene-co-acrylic acid (StS-coAA) films.•Pt||poly-[StS-co-AA] modified electrodes are permeable to AgNP. Nanoparticulate materials exhibit interesting physicochemical properties due to its high surface area and reactivity. They are promising for application in the development of catalytic systems, electronic and photovoltaic devices, fuel cells, sensors, biomaterials, among others. Silver nanoparticles (AgNPs) are recognized by their biocidal action, which makes them attractive in the manufacture of biomedical devices, including skin patches with antimicrobial properties. However, there are very few studies on the permeation of nanoparticles in polymer films and tissues. In this works, we present the results of Ag+ ion and silver nanoparticles permeation studies in poly-[St-co-AA] and poly-[StS-co-AA] (StS=styrene sulfonated) membranes using electrochemical techniques. Polymeric films were characterized by spectroscopic technics and atomic force microscopy. Our findings demonstrated that the sulfonated copolymer in the medium is more permeable to the diffusion of AgNPs when compared to the non-sulfonated film. Regarding the Ag+ ion, the presence of the polymeric film in the electrodes, does not affect the E1/2 of the redox process Ag+/Ag0.
ISSN:0927-7757
1873-4359
DOI:10.1016/j.colsurfa.2017.01.060