Archivio Istituzionale della RicercaWe studied the effect of poly-N-vinylpyrrolidone (PVP) and its concentrations on the photoinduced formation of silver nanoparticles (Ag NPs) as well as Ag-polymer nanocomposites. First, the effect of PVP concentration on the photoinduced reduction of Ag nitrate (AgNO3) in solution was studied by UV-Vis absorption spectroscopy monitoring the plasmon band of Ag. Dynamic light scattering (DLS) results showed that Ag NPs formed in the presence of stabilizer up to 4 wt% were narrower; the size distribution was also narrower. The PVP also had a significant influence on the formation of polymer nanocomposites by simultaneous photoinduced synthesis of NPs and polymerization of the acrylic matrix; NPs embedded in the crosslinked polymer were well dispersed, as detected by field-emission scanning electron microscopy (FESEM), and showed an average diameter of 20 nm.
Silver polymer nanocomposites by photoreduction of AgNO3and simultaneous photocrosslinking of the acrylic matrix: Effect of PVP on Ag particle formation / Nazar, Rabia; Sangermano, Marco; Vitale, Alessandra; Bongiovanni, Roberta. - In: JOURNAL OF POLYMER ENGINEERING. - ISSN 0334-6447. - ELETTRONICO. - 38:8(2018), pp. 803-809. [10.1515/polyeng-2017-0156]
Silver polymer nanocomposites by photoreduction of AgNO3and simultaneous photocrosslinking of the acrylic matrix: Effect of PVP on Ag particle formation
Nazar, Rabia;Sangermano, Marco;Vitale, Alessandra;Bongiovanni, Roberta
2018
Abstract
We studied the effect of poly-N-vinylpyrrolidone (PVP) and its concentrations on the photoinduced formation of silver nanoparticles (Ag NPs) as well as Ag-polymer nanocomposites. First, the effect of PVP concentration on the photoinduced reduction of Ag nitrate (AgNO3) in solution was studied by UV-Vis absorption spectroscopy monitoring the plasmon band of Ag. Dynamic light scattering (DLS) results showed that Ag NPs formed in the presence of stabilizer up to 4 wt% were narrower; the size distribution was also narrower. The PVP also had a significant influence on the formation of polymer nanocomposites by simultaneous photoinduced synthesis of NPs and polymerization of the acrylic matrix; NPs embedded in the crosslinked polymer were well dispersed, as detected by field-emission scanning electron microscopy (FESEM), and showed an average diameter of 20 nm.
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https://hdl.handle.net/11583/2713318
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