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Wearable and Flexible Radiation Shielding Natural Rubber Composites: Effect of Different Radiation Shielding Fillers
Radiation Physics and Chemistry ( IF 2.9 ) Pub Date : 2021-02-01 , DOI: 10.1016/j.radphyschem.2020.109261
Ekwipoo Kalkornsurapranee , Suchart Kothan , Sirilak Intom , Jobish Johns , Siriprapa Kaewjaeng , Chittra Kedkaew , Wuttichai Chaiphaksa , Thanapong Sareein , Jakrapong Kaewkhao

Abstract Flexible shielding materials based on natural rubber (NR) composites were successfully prepared and developed. The different radiation shielding fillers including barium carbonate (BaCO3), bismuth oxides (Bi2O3) and barium sulfate (BaSO4) were used as X-rays and gamma rays radiation shielding fillers in NR composites. Crosslink density and mechanical properties (i.e., modulus at 100% elongation, tensile strength, % Elongation at break, hardness and specific gravity) were investigated extensively. It was found that NR/Bi2O3 composite gave highest crosslink density, tensile strength, % Elongation at break and specific gravity. It is noted that all types of radiation shielding fillers showed insignificantly difference in term of modulus at 100% elongation and hardness. For the resulting of gamma radiation attenuation properties, it is seen that NR/Bi2O3 composite gave highest mass attenuation coefficient ( μ m ), lead equivalent and lowest half value layer (HVL), inferring that NR/Bi2O3 composite could be better gamma radiation attenuation than those of NR/BaCO3 and NR/BaSO4 composite. For the X-rays radiation attenuation properties in terms of liner attenuation coefficient ( μ ), half value layer (HVL) and lead equivalent, the results gave good agreement with gamma radiation attenuation properties. In comparison of half value layer between NR/radiation shielding fillers composites and commercial available radiation shielding materials showed that the NR/Bi2O3 composite provided better gamma radiation shielding than those of commercial radiation shielding window, serpentine, hematite serpentine and ordinary concrete. In addition, all NR composite with different shielding fillers exhibited greater X-rays radiation shielding than those of commercial and X-rays window with better performance in term of flexibilities, extensibilities and elasticities. NR/Bi2O3 composite is the most suitable choice of preparing a novel flexible radiation shielding materials.

中文翻译:

耐磨和柔性辐射屏蔽天然橡胶复合材料:不同辐射屏蔽填料的影响

摘要 成功制备并开发了基于天然橡胶(NR)复合材料的柔性屏蔽材料。包括碳酸钡 (BaCO3)、氧化铋 (Bi2O3) 和硫酸钡 (BaSO4) 在内的不同辐射屏蔽填料被用作 NR 复合材料中的 X 射线和伽马射线辐射屏蔽填料。广泛研究了交联密度和机械性能(即 100% 伸长率时的模量、拉伸强度、断裂伸长率百分比、硬度和比重)。发现 NR/Bi2O3 复合材料具有最高的交联密度、拉伸强度、断裂伸长率和比重。值得注意的是,所有类型的辐射屏蔽填料在 100% 伸长率和硬度的模量方面均表现出不显着的差异。对于由此产生的伽马辐射衰减特性,可以看出,NR/Bi2O3 复合材料具有最高的质量衰减系数 (μm)、铅当量和最低半值层 (HVL),推断 NR/Bi2O3 复合材料比 NR/BaCO3 和 NR/ BaSO4 复合物。对于线性衰减系数 (μ)、半值层 (HVL) 和铅当量方面的 X 射线辐射衰减特性,结果与伽马辐射衰减特性具有良好的一致性。NR/辐射屏蔽填料复合材料与市售辐射屏蔽材料半值层的比较表明,NR/Bi2O3复合材料比商业辐射屏蔽窗、蛇纹石、赤铁矿蛇纹石和普通混凝土提供更好的γ辐射屏蔽。此外,所有具有不同屏蔽填料的 NR 复合材料都表现出比商业和 X 射线窗口更大的 X 射线辐射屏蔽,在柔韧性、延展性和弹性方面具有更好的性能。NR/Bi2O3复合材料是制备新型柔性辐射屏蔽材料最合适的选择。
更新日期:2021-02-01
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