Research on X-ray shielding performance of wearable Bi/Ce-natural leather composite materials
2020
Li, Qian | Wang, Yaping | Xiao, Xiao | Zhong, Rui | Liao, Jiali | Guo, Junling | Liao, Xuepin | Shi, Bi
Natural leather (NL) based composite protection materials with lightweight, flexibility, wearability and high shielding efficiency will remarkably innovate the current research on X-ray protection materials. A co-doped Bi/Ce-NL composite with outstanding X-ray attenuation in the energy range of 20−120 keV is successfully fabricated. The uniform distribution of Bi₂O₃ and CeO₂ nanoparticles in the hierarchical structure of natural leather significantly promotes the X-ray attenuation by improving the weak absorption region of Bi with Ce via synergistic effects of the two elements. The fabricated Bi/Ce-NL loading with 0.755 mmol cm⁻³ Bi₂O₃ and 1.51 mmol cm⁻³ CeO₂ achieves approximately 100% X-ray shielding when the energy below 40 keV. Thus, the fabricated Bi/Ce-NL with superb X-ray attenuation can safely and comfortably protect human from the risk of X-ray exposure with low bulk density, high water vapor permeability, exceptional mechanical properties and excellent bending resistance, presenting significant advantages in wearability and flexibility compared to both traditional lead-based and polymer-based protection materials.
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