Ag-Cu/PMMA nanocomposite, obtained by bimetallic electrical explosive nanoparticles modification

Bimetallic nanoparticles Cu-94Ag, Cu-55Ag, Cu-22Ag were obtained by electric explosion of copper and silver wires in an argon medium. As synthesized nanoparticles were characterized by transmission electron microscopy and X-ray diffraction analysis. The nanoparticles have a spherical shape. Copper and silver are distributed uniformly in the nanoparticles volume. Phase compositions corresponding to solid solutions based on copper or silver are present in the samples. The conditions for ultrasonic dispersion of nanoparticle suspensions were selected. According to sedimentation analysis data, the optimal ultrasonic treatment time was 5 min for Cu-65Ag and Cu-22Ag and 2 min for Cu-94Ag nanoparticles using 23 kW ultrasound. The nanoparticles were used as antibacterial modifiers for polymethyl methacrylate. The Ag-Cu/PMMA composites had high antibacterial activity against Escherichia coli.

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