Abstract
The radioprotective ability of composite materials based on a polyvinylacetate host with dispersed nanopowder fillers obtained from the environmentally friendly recycling of hard-alloy waste products is assessed. Elemental and granulometric analysis of nanopowder mixture fillers was carried out. The powders were shown to principally (a mixture of tungsten and titanium carbides) nanoparticles and nanoplates with sizes ranging from 20 to 100 nm, larger particles are agglomerates. The attenuation of gamma radiation, in the energy range 0.662 to 2 MeV, is investigated as a function of the percentage nanoparticle concentration. The linear γ-radiation adsorption coefficients are determined. An optimum concentration of around 20% was established, with greater concentrations reducing the attenuation. By optimizing the concentration, a decrease of more than four times in the activity was observed when compared to the pure polyvinylacetate host.
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