CaO-enhanced polyester for safety: experimental study on fabrication, characterization, and gamma-ray attenuation

IF 1.4 3区化学 Q4 CHEMISTRY, INORGANIC & NUCLEAR Radiochimica Acta Pub Date : 2024-01-12 DOI:10.1515/ract-2023-0265

M. Marashdeh, K. A. Mahmoud

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Abstract

Abstract The current work deals with studying the influence of cheap, widespread CaO on improving the γ ray-protection capacity of the lightweight, sealing polyester. Therefore, polyester composites were filled with different concentrations of CaO fillers. The fabricated CaO-reinforced polyester composites’ density ranged between 1.177 g/cm3 and 1.377 g/cm3, when CaO filler concentrations increased between 0 wt% and 60 wt%, respectively. Fabricated composites’ morphology and chemical composition, as well as CaO fillers’ grain size and distribution, were proved using SEM and EDX spectroscopy. Additionally, the influence of CaO fillers on the gamma-ray shielding properties of the fabricated composites was evaluated using the Monte Carlo simulation and confirmed using the experimental measurements. The recorded results show an enhancement in the synthesized composites’ linear attenuation coefficient from 0.091 cm−1 to 0.106 cm−1 at a gamma ray energy of 0.662 MeV. Moreover, the excess in CaO concentration from 0 wt% and 60 wt% reduces the fabricated composites’ half-value thickness values from 7.64 cm to 6.51 cm, respectively.

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氧化钙增强型安全聚酯：关于制造、表征和伽马射线衰减的实验研究

摘要当前的工作是研究廉价、广泛使用的氧化钙对提高轻质密封聚酯的γ射线防护能力的影响。因此，聚酯复合材料中填充了不同浓度的 CaO 填料。当 CaO 填料浓度在 0 wt% 和 60 wt% 之间增加时，制备的 CaO 增强聚酯复合材料的密度在 1.177 g/cm3 和 1.377 g/cm3 之间。利用扫描电镜和乙二胺四乙酸（EDX）光谱法证明了制备的复合材料的形貌和化学成分，以及 CaO 填料的粒度和分布。此外，还利用蒙特卡洛模拟评估了 CaO 填料对所制复合材料伽马射线屏蔽性能的影响，并通过实验测量进行了确认。记录结果显示，在伽马射线能量为 0.662 MeV 时，合成复合材料的线性衰减系数从 0.091 cm-1 提高到 0.106 cm-1。此外，氧化钙浓度从 0 wt% 增加到 60 wt%，复合材料的半值厚度值也从 7.64 cm 减小到 6.51 cm。

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