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 the 70–90 keV range, the lead-free multilayered polymer composites were designed and fabricated. The effects of the direction of incidence of the X-rays and number of layer...

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Autores principales:	Zefeng Li, Wei Zhou, Xianlong Zhang, Yue Gao, Shaoyun Guo
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/0aae7481c2e4468aa552579228ca187e
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spelling	oai:doaj.org-article:0aae7481c2e4468aa552579228ca187e2021-12-02T14:28:20ZHigh-efficiency, flexibility and lead-free X-ray shielding multilayered polymer composites: layered structure design and shielding mechanism10.1038/s41598-021-83031-42045-2322https://doaj.org/article/0aae7481c2e4468aa552579228ca187e2021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-83031-4https://doaj.org/toc/2045-2322Abstract To overcome the severe toxicity and blind absorption zone of conventional lead-based shielding materials for X-rays in the 70–90 keV range, the lead-free multilayered polymer composites were designed and fabricated. The effects of the direction of incidence of the X-rays and number of layers as well as layer thickness ratio of the (tungsten/ethylene-octene copolymer)/(bismuth/ethylene-octene copolymer) layered composites on their shielding efficiency were studied systematically. Compared to the traditional polymer blending, the multilayered polymer composites exhibited the improved photon attenuation. The multilayered polymer composites (layer thickness ratio was 3:7) with 6 layers had the best X-ray shielding ability. Moreover, the X-ray shielding provided by the multi-layered interfaces and the multiple complementary effect of the absorption within the multilayered structure were firstly proposed based on computer simulations. The multilayered structural design effectively weakened the probability of the X-ray penetration. Therefore, the X-ray shielding capability can be effectively enhanced through increasing number of layers and the synergistic effect of multi-layered interfaces. The experimental results of this study can serve as guidelines for the fabrication of flexibility, lead-free, lightweight and high-efficiency X-ray shielding materials.Zefeng LiWei ZhouXianlong ZhangYue GaoShaoyun GuoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Zefeng Li Wei Zhou Xianlong Zhang Yue Gao Shaoyun Guo High-efficiency, flexibility and lead-free X-ray shielding multilayered polymer composites: layered structure design and shielding mechanism
description	Abstract To overcome the severe toxicity and blind absorption zone of conventional lead-based shielding materials for X-rays in the 70–90 keV range, the lead-free multilayered polymer composites were designed and fabricated. The effects of the direction of incidence of the X-rays and number of layers as well as layer thickness ratio of the (tungsten/ethylene-octene copolymer)/(bismuth/ethylene-octene copolymer) layered composites on their shielding efficiency were studied systematically. Compared to the traditional polymer blending, the multilayered polymer composites exhibited the improved photon attenuation. The multilayered polymer composites (layer thickness ratio was 3:7) with 6 layers had the best X-ray shielding ability. Moreover, the X-ray shielding provided by the multi-layered interfaces and the multiple complementary effect of the absorption within the multilayered structure were firstly proposed based on computer simulations. The multilayered structural design effectively weakened the probability of the X-ray penetration. Therefore, the X-ray shielding capability can be effectively enhanced through increasing number of layers and the synergistic effect of multi-layered interfaces. The experimental results of this study can serve as guidelines for the fabrication of flexibility, lead-free, lightweight and high-efficiency X-ray shielding materials.
format	article
author	Zefeng Li Wei Zhou Xianlong Zhang Yue Gao Shaoyun Guo
author_facet	Zefeng Li Wei Zhou Xianlong Zhang Yue Gao Shaoyun Guo
author_sort	Zefeng Li
title	High-efficiency, flexibility and lead-free X-ray shielding multilayered polymer composites: layered structure design and shielding mechanism
title_short	High-efficiency, flexibility and lead-free X-ray shielding multilayered polymer composites: layered structure design and shielding mechanism
title_full	High-efficiency, flexibility and lead-free X-ray shielding multilayered polymer composites: layered structure design and shielding mechanism
title_fullStr	High-efficiency, flexibility and lead-free X-ray shielding multilayered polymer composites: layered structure design and shielding mechanism
title_full_unstemmed	High-efficiency, flexibility and lead-free X-ray shielding multilayered polymer composites: layered structure design and shielding mechanism
title_sort	high-efficiency, flexibility and lead-free x-ray shielding multilayered polymer composites: layered structure design and shielding mechanism
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/0aae7481c2e4468aa552579228ca187e
work_keys_str_mv	AT zefengli highefficiencyflexibilityandleadfreexrayshieldingmultilayeredpolymercompositeslayeredstructuredesignandshieldingmechanism AT weizhou highefficiencyflexibilityandleadfreexrayshieldingmultilayeredpolymercompositeslayeredstructuredesignandshieldingmechanism AT xianlongzhang highefficiencyflexibilityandleadfreexrayshieldingmultilayeredpolymercompositeslayeredstructuredesignandshieldingmechanism AT yuegao highefficiencyflexibilityandleadfreexrayshieldingmultilayeredpolymercompositeslayeredstructuredesignandshieldingmechanism AT shaoyunguo highefficiencyflexibilityandleadfreexrayshieldingmultilayeredpolymercompositeslayeredstructuredesignandshieldingmechanism
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High-efficiency, flexibility and lead-free X-ray shielding multilayered polymer composites: layered structure design and shielding mechanism

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