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Materiale Plastice
https://doi.org/10.37358/Mat.Plast.1964

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ISSN 0025-5289
ISSN 2668-8220 (online)
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Materiale Plastice, Volume 51, Issue 1, pp. (2014)




Gabriel MustATea, Ioan CAlinescu, AUREL DIACON, LAVINIA BALAN Photoinduced Synthesis of Silver/polymer Nanocomposites


Abstract:
Direct photoreduction and photosensitization are powerful approaches for the in-situ synthesis in a polymer matrix. A silver-acrylate nanocomposite was prepared using a novel one-pot strategy involving simultaneous photoinduced reduction and free radical polymerization processes. The fabrication of metal nanocomposite was performed using an acrylate functionalized oligomer (polyethylene glycol 600 diacrylate) and a silver salt (AgNO3). The formation of Ag-nanoparticles was followed by UV-Vis spectroscopy which shows a surface plasmon band at a wavelength range between 410 and 440 nm. Transmission electron microscopy revealed that the synthesized nanoparticles were spherical in shape with a diameter between 5 to 20 nm. The polymerization process was followed quantitatively by infrared spectroscopy, monitoring the disappearance of the characteristic bands for the acrylate double bonds (1410 cm-1). The optimum conditions for obtaining the silver-polymer nanocomposites have been determined (silver precursor concentration, molar ratio silver precursor/photoinitiator, irradiation time and intensity). A reaction mechanism was proposed to explain the polymerization rate dependence on the silver cations content. Keywords: Silver nanoparticles, photo polymerization, acrylate, nanocomposites



Issue: 2014 Volume 51, Number 1
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