化工新型材料

化工新型材料 ›› 2024, Vol. 52 ›› Issue (2) : 104-109. DOI: 10.19817/j.cnki.issn1006-3536.2024.02.040

新材料与新技术

改性纳米Bi₂O₃/Eu₂O₃/EPVC基X射线屏蔽材料的制备及性能研究

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^1,2,3*

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Preparation and properties of modified nano Bi₂O₃/Eu₂O₃/EPVC X-ray shielding materials

Zhao Jiao^1,2, Ren Yi^1,2, Dai Xuezhi^1,2, Yan Minhao^1,2,3

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Received		Published
2022-11-16		2024-02-20
Issue Date	Revised Date
2024-02-28	2022-11-16

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摘要

针对当前辐射防护产品日益增长的需求,研发出一种新型X射线屏蔽材料。以乙烯基三甲氧基硅烷(A-171)对纳米氧化铋(Bi₂O₃)、纳米氧化铕(Eu₂O₃)进行表面改性,并作为填料填充至PVC糊树脂(EPVC)基体中制备得到改性纳米复合材料Bi₂O₃/Eu₂O₃/EPVC(简称为BEP)。采用X射线衍射仪(XRD)、傅里叶红外光谱(FT-IR)对改性前后的纳米颗粒进行表征。采用模拟计算与实验相结合的方式,通过WinXcom模拟Bi₂O₃、Eu₂O₃对X射线的屏蔽能力并计算Bi₂O₃、Eu₂O₃的最佳质量配比,通过热重分析、力学性能测试、断面扫描及X射线屏蔽性能测试研究了改性纳米填料含量对BEP性能的影响。结果表明:改性纳米Bi₂O₃、Eu₂O₃质量比为1:1时BEP同时具备对中、低能X射线有较好的屏蔽性能,且填料基体质量比为5:2,厚度为4mm时能达到同等厚度下最佳的X射线屏蔽效果。实际应用中,填料与EPVC基体的质量比为5:1时具有最佳拉伸性能。BEP材料环境友好、无生物毒性,可用来替代含铅材料在X射线屏蔽中的部分功能。

Abstract

A new X-ray shielding material was developed to meet the current growing demand for radiation protection products.The modified nanocomposites Bi₂O₃/Eu₂O₃/EPVC (referred to as BEP) were prepared by surface modification of bismuth oxide nanoparticles (Bi₂O₃) and europium oxide nanoparticles (Eu₂O₃) with vinyltrimethoxysilane (A-171) and filled into the matrix of PVC paste resin (EPVC) as fillers.The nanoparticles before and after modification were characterized by X-ray diffractometry (XRD) and Fourier infrared spectroscopy (FT-IR).A combination of simulation calculation and experiment was used to simulate the shielding ability of Bi₂O₃ and Eu₂O₃ against X-rays and calculate the optimal mass ratio of Bi₂O₃ and Eu₂O₃ by WinXcom.The effect of modified nanofiller content on the performance of BEP was investigated by thermogravimetric analysis,mechanical property test,section scan and X-ray shielding property test.The results showed that BEP had good shielding performance against both medium and low energy X-rays when the mass ratio of modified nano Bi₂O₃ and Eu₂O₃ was 1:1.Moreover,the best X-ray shielding effect could be achieved at the same thickness when the mass ratio of filler matrix was 5:2 and the thickness was 4 mm.In practical applications,the best tensile performance was observed when the mass ratio of filler to EPVC matrix was 5:1.BEP material is environmentally friendly,non-biotoxic,and can be used to replace some of the functions of lead-containing materials in X-ray shielding.

关键词

X射线屏蔽 / 辐射防护 / 氧化铋 / 氧化铕

Key words

X-ray shielding / radiation protection / bismuth oxide / europium oxide

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改性纳米Bi₂O₃/Eu₂O₃/EPVC基X射线屏蔽材料的制备及性能研究[J]. 化工新型材料, 2024, 52(2): 104-109 DOI:10.19817/j.cnki.issn1006-3536.2024.02.040

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