Gamma ray shielding property, shielding mechanism and predicting model of continuous basalt fiber reinforced polymer matrix composite containing functional filler
Gamma ray shielding property, shielding mechanism and predicting model of continuous basalt fiber reinforced polymer matrix composite containing functional filler
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DOI：
10.1016/j.matdes.2017.03.045
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发表时间：
2017-06-15
影响因子：
8.4
通讯作者：
Zhang, Zuoguang
中科院分区：
文献类型：
--
作者：
Li, Ran;Gu, Yizhuo;Zhang, Zuoguang
功能屏蔽填料改性纤维增强聚合物基复合材料是一种新型结构/辐射屏蔽材料，在核工业和放射治疗等领域具有广阔的应用前景。本研究制备了含有不同含量的钨(W)和氧化铒（Er2O3）填料的单向玄武岩纤维增强环氧树脂基复合材料层板。基于光子屏蔽机理，对伽玛射线的质量衰减系数进行了实验测量和理论计算，并进行了分析。研究了填料含量和γ射线光子能量对复合材料屏蔽性能的影响。研究发现，添加W和Er2O3填料可显著提高玄武岩纤维复合材料的质量衰减系数，特别是在低光子能量下。在低填充物含量时，测量结果与计算结果之间的差异很明显，这可能是由于对穿透光子的考虑不同，穿透光子经历了轻微的康普顿散射。讨论了相应的机理。建立了基于光电吸收效应、康普顿散射效应和有效原子序数的经验模型，修正了计算得到的质量衰减系数。仿真结果表明，该模型具有良好的精度，可用于设计具有较好屏蔽性能的复合材料。(C) 2017 Elsevier Ltd.版权所有。
Functional shielding filler modified fiber reinforced polymer matrix composites are novel structural/radiation shielding materials with great potentials in applications such as nuclear industry and radioactive therapy. In this study, unidirectional basalt fiber reinforced epoxy resin matrix composite laminates containing different contents of tungsten (W) and erbium oxide (Er2O3) fillers were fabricated. Experimental measurement and theoretical calculation of mass attenuation coefficients of gamma ray were carried out and analyzed based on photon shielding mechanism. The effects of filler content and photon energy of gamma ray on shielding property of composite were studied. It is found that adding W and Er2O3 fillers significantly increases mass attenuation coefficient of basalt fiber composite, especially for low photon energy. The discrepancy between measured and calculated results is obvious at low filler content, and is believed to come from different considerations on penetrating photons, which have undergone slight Compton scattering. The corresponding mechanism was discussed. An empirical model based on photoelectric absorption effect, Compton scattering effect and effective atomic number is established to modify calculated mass attenuation coefficient. A good accuracy was validated, so the model can be used to design this kind of composite for better shielding ability. (C) 2017 Elsevier Ltd. All rights reserved.