abstract

• Plasticized polyvinyl chloride (PVC) composites were prepared with tantalum oxide V (Ta2O5) and/or bismuth oxide III (Bi2O3) nanoparticles (NPs) at different concentrations and further cross-linked with a dose of 75 kGy of gamma rays. The materials obtained are light, flexible and nontoxic, to be used as radiation attenuators in the medical area for replacing the traditional lead which is toxic and dense. Mechanical tests through mechanical dynamic analysis (DMA) show an enhanced tenacity for composites and lightness, according to density mea-surements. By means of scanning electron microscope images (SEM), an adequate dispersion of the nanoparticles (NPs) was observed. The X-ray attenuation property was evaluated at radiodiagnosis energies (50-129 kV) using a conventional X-ray equipment, observing values of mass attenuation coefficients greater than those of lead, when PVC composites were loaded with 50 wt percent (%25 wt) of a combination of Ta2O5 and Bi2O3 NPs. Half and tenth value layers of 0.77 and 2.20 mm respectively, for 129 kV X-Rays were also obtained. Non-toxicity of the composites was observed by means of a cell viability test. Therefore, the investigated materials are promising for the fabrication of medical diagnostic X-ray shielding attachments.

authors

• Martínez-Pardo M.E.
• Mendoza Mendoza Esmeralda
• Nuñez-Briones A.G.

publication date

• 2023-01-01

funding provided via

• CONACYT [552916]  Grant

published in

• RADIATION PHYSICS AND CHEMISTRY  Journal

keywords

• Nanoparticles; X-ray; Attenuation coefficient; Toughness; Half-value layer; Nontoxic materials

Digital Object Identifier (DOI)

• 10.1016/j.radphyschem.2022.110512

PubMed ID

start page

end page

volume

• 202

issue