High-efficiency, flexibility and lead-free X-ray shielding multilayered polymer composites: layered structure design and shielding mechanism

Abstract To overcome the severe toxicity and blind absorption zone of conventional lead-based shielding materials for X-rays in 70–90 keV range, lead-free multilayered polymer composites were designed fabricated. The effects direction incidence number layers as well layer thickness ratio (tungsten/ethylene-octene copolymer)/(bismuth/ethylene-octene copolymer) layered on their efficiency studied systematically. Compared to traditional blending, exhibited improved photon attenuation. (layer was 3:7) with 6 had best X-ray ability. Moreover, provided by multi-layered interfaces multiple complementary effect within structure firstly proposed based computer simulations. structural design effectively weakened probability penetration. Therefore, capability can be enhanced through increasing synergistic interfaces. experimental results this study serve guidelines fabrication flexibility, lead-free, lightweight high-efficiency materials.