改性纳米Bi_(2)O_(3)/Eu_(2)O_(3)/EPVC基X射线屏蔽材料的制备及性能研究  

Preparation and properties of modified nano Bi_(2)O_(3)/Eu 2O 3/EPVC X-ray shielding materials

作　　者：赵娇 任翼 戴学志 晏敏皓 Zhao Jiao;Ren Yi;Dai Xuezhi;Yan Minhao(State Key Laboratory of Environment-Friendly Energy Materials,Southwest University of Science and Technology,Mianyang 621010;School of Materials and Chemistry,Southwest University of Science and Technology,Mianyang 621010;Suzhou Zihan Science and Technology Co.,Ltd.,Suzhou 215011)

机构地区：[1]西南科技大学环境友好能源材料国家重点实验室,绵阳621010 [2]西南科技大学材料与化学学院,绵阳621010 [3]苏州子涵科技有限公司,苏州215011

出　　处：《化工新型材料》2024年第2期104-109,共6页New Chemical Materials

基　　金：国家自然科学基金联合基金项目(U1932117);四川省自然科学基金项目(2022JDTD0017和2022NSFSC1228);西南科技大学博士基金项目(21zx7102)。

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(Bi_(2)O_(3))、纳米氧化铕(Eu_(2)O_(3))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Bi_(2)O_(3)/Eu_(2)O_(3)/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Bi_(2)O_(3)、Eu_(2)O_(3)对X射线的屏蔽能力并计算Bi_(2)O_(3)、Eu_(2)O_(3)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Bi_(2)O_(3)、Eu_(2)O_(3)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。A new X-ray shielding material was developed to meet the current growing demand for radiation protection products.The modified nanocomposites Bi_(2)O_(3)/Eu_(2)O_(3)/EPVC(referred to as BEP)were prepared by surface modification of bismuth oxide nanoparticles(Bi_(2)O_(3))and europium oxide nanoparticles(Eu_(2)O_(3))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 Bi_(2)O_(3) and Eu_(2)O_(3) against X-rays and calculate the optimal mass ratio of Bi_(2)O_(3) and Eu_(2)O_(3) 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 Bi_(2)O_(3) and Eu_(2)O_(3) 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 

分 类 号：TQ050[化学工程]