Flexible Low-Melting Point Radiation Shielding Materials: Soft Elastomers with GaInSnPbBi High-Entropy Alloy Inclusions

作者：Wang, Kaizhao; Hu, Jin^*; Chen, Tianyou; Zhang, Weijun; Fan, Hongtao; Feng, Yongjin; Zhao, Ziqiang; Wang, Kaijun^*

来源：Macromolecular Materials and Engineering, 2021, 306(12): 2100457.

DOI：10.1002/mame.202100457

• GaInSnPbBi
• low-melting-point high-entropy alloys
• Monte Carlo N-particle extended
• polymer composites
• radiation shielding
• soft elastomers

A polydimethylsiloxane (PDMS) matrix soft elastic composite material with low-melting-point GaInSnPbBi high-entropy alloy (LHEA) inclusions is prepared to evaluate its radiation shielding performance. The LHEA is composed of two different three-component eutectic microstructures, which are grown in a mixed manner to form a complex eutectic structure. The inclusions have excellent mechanical properties that matched the deformation of the PDMS matrix. To evaluate the interaction of the shielding material with photons, the Monte Carlo N-Particle Extended and XCOM codes are used to determine the shielding parameters of the LHEA/PDMS composites, such as mass attenuation coefficient, linear attenuation coefficient, half-value layer, tenth value layer, mean free path, and effective atomic number. The composite with 50-vol% LHEA has the best radiation shielding properties, validated by medical X-ray imaging experiments. The excellent shielding properties of the flexible lightweight composites are attributed to the higher mass attenuation coefficient of the LHEA inclusions than that of lead.

• 单位
  云南省第一人民医院; 核工业西南物理研究院; 昆明理工大学