用于中子屏蔽应用的新型GdO-环氧树脂复合材料的制备与表征

Preparation and characterization of a new GdO-epoxy composite for neutron shielding applications.

作者信息

Safavi Seyed Mohammadreza, Outokesh Mohammad, Vosoughi Naser, Yahyazadeh Amin, Mohammadi Aghil, Kiani Mohammad Amin, Jabalamelian Seyed Sajad

机构信息

Department of Energy Engineering, Sharif University of Technology, Azadi Ave., P.O. Box: 11115-1639, Tehran, Iran.

Department of Energy Engineering and Physics, Amirkabir University of Technology, Enghelab Ave., P.O. Box: 15875-4413, Tehran, Iran.

出版信息

Sci Rep. 2024 Oct 27;14(1):25663. doi: 10.1038/s41598-024-77070-w.

DOI:10.1038/s41598-024-77070-w

PMID:39463381

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11514267/

Abstract

The current study aims to introduce a new polymeric composite consisting of epoxy resin as the matrix and gadolinium oxide (GdO) as the neutron adsorption ingredient. The shielding performance of the composite was assessed by neutron attenuation experiments with an Am-Be source and polyethylene moderator. The results of these experiments showed an appreciable agreement with the Monte Carlo simulations. Other characteristics of the composite, including mechanical strength, thermal stability, microtexture, and its chemical compositions, were examined using standard tensile test, thermogravimetric analysis, X-ray diffraction, scanning electron microscopy, static light scattering analyses, and Fourier-transform infrared spectroscopy (FTIR). The results indicated that the new composites offer appreciable neutron absorption properties so that samples with 0.5%, 2%, 5%, and 10% GdO content could reduce the neutron beam intensity by 54%, 63%, 66%, and 70% at a thickness of 4 cm.

摘要

当前的研究旨在引入一种新型聚合物复合材料，该材料以环氧树脂为基体，氧化钆（GdO）作为中子吸收成分。通过使用镅 - 铍源和聚乙烯慢化剂进行中子衰减实验，评估了该复合材料的屏蔽性能。这些实验结果与蒙特卡罗模拟结果显示出明显的一致性。使用标准拉伸试验、热重分析、X射线衍射、扫描电子显微镜、静态光散射分析和傅里叶变换红外光谱（FTIR）对该复合材料的其他特性进行了研究，包括机械强度、热稳定性、微观结构及其化学成分。结果表明，这种新型复合材料具有可观的中子吸收性能，以至于氧化钆含量为0.5%、2%、5%和10%的样品在4厘米厚度时可使中子束强度分别降低54%、63%、66%和70%。