高等学校化学学报 ›› 2024, Vol. 45 ›› Issue (9): 20240142.doi: 10.7503/cjcu20240142

• 研究论文: 无机化学 • 上一篇    下一篇

微米板Sm2O3填料增强HDPE复合材料的制备及中子和伽马辐射屏蔽性能

鲁义东1,2, 霍志鹏1(), 张宏1, 钟国强1   

  1. 1.中国科学院合肥物质科学研究院等离子体物理研究所, 合肥 230031
    2.中国科学技术大学研究生院科学岛分院, 合肥 230026
  • 收稿日期:2024-03-25 出版日期:2024-09-10 发布日期:2024-05-23
  • 通讯作者: 霍志鹏 E-mail:zhipeng.huo@ipp.ac.cn
  • 基金资助:
    安徽省生态环境科研项目(2023hb0017);安徽省高校协同创新项目(GXXT-2022-001);聚变堆主机关键系统综合研究设施项目(2018-000052-73-01-001228);合肥综合性国家科学中心能源研究院(安徽省能源实验室)项目(21KZL401)

Preparation of Micron Plate Sm2O3 Fillers Reinforced High-density Polyethylene Composites for Neutron and Gamma Radiation Shielding

LU Yidong1,2, HUO Zhipeng1(), ZHANG Hong1, ZHONG Guoqiang1   

  1. 1.Institute of Plasma Physics,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China
    2.Science Island Branch,Graduate School of University of Science and Technology of China,Hefei 230026,China
  • Received:2024-03-25 Online:2024-09-10 Published:2024-05-23
  • Contact: HUO Zhipeng E-mail:zhipeng.huo@ipp.ac.cn
  • Supported by:
    the Anhui Province Ecological Environment Research Project, China(2023hb0017);the University Synergy Innovation Program of Anhui Province, China(GXXT-2022-001);the Comprehensive Research Facility for Fusion Technology Program of China(2018-000052-73-01-001228);the Programs of Institute of Energy, Hefei Comprehensive National Science Center, China(21KZL401)

摘要:

分别采用合成的Sm2O3(Sm2O3-I)填料与商用Sm2O3(Sm2O3-II)填料制备了Sm2O3/碳化硼(B4C)/高密度聚乙烯(HDPE)复合材料, 并用于中子和伽马辐射屏蔽. X射线衍射(XRD)结果表明, Sm2O3-I填料属于立方晶系、 体心立方晶格、 Ia3¯(206)空间群; 而Sm2O3-II填料中存在两种物相, 一种为单斜晶系、 简单单斜格子、 C2/m(12)空间群, 另一种为立方晶系、 体心立方晶格、 Ia3¯(206)空间群. 场发射扫描电子显微镜(FESEM)和比表面积分析 结果表明, Sm2O3-I填料微观形貌为带狭缝的微米板结构, 其Brunauer-Emmett-Teller(BET)比表面积(SBET)为5.15 m2/g; Sm2O3-II填料中存在由两种物相导致的板状团聚体与无特定形貌团聚体两种微观形貌, 其SBET为2.47 m2/g. 合成的微米板Sm2O3-I/B4C/HDPE复合材料的熔融温度(Tp)和屈服应力(σy)分别为140.6 ℃和22.6 MPa, 优于商用Sm2O3-II/B4C/HDPE复合材料. 中子和伽马辐射屏蔽测试结果表明, 尺寸均一且具有高BET比表面积的微米板Sm2O3-I填料可提高复合材料的中子和伽马辐射屏蔽性能. 厚度为15 cm的10%Sm2O3-I/20%B4C/70%HDPE(质量分数)复合材料对252Cf中子源的中子屏蔽率达98.4%, 对137Cs伽马源的伽马辐射屏蔽率达71.7%, 均高于采用商用Sm2O3-II作为填料的复合材料.

关键词: Sm2O3, 复合材料, 中子, 伽马, 辐射屏蔽

Abstract:

Samarium oxide (Sm2O3)/boron carbide (B4C)/high-density polyethylene (HDPE) composites are respectively prepared by using synthesized Sm2O3 fillers (Sm2O3-I) and commercial Sm2O3 fillers (Sm2O3-II) for neutron and gamma radiation shielding. The X-ray diffraction (XRD) patterns reveal that the phase of Sm2O3-I fillers is a cubic crystal system, body-centered cubic lattices, and its space group is Ia3¯(206). However, Sm2O3-II fillers have two phases. One is a monoclinic crystal system, simple monoclinic lattices, and its space is C2/m(12). The other one is a cubic crystal system, body-centered cubic lattices, and the space group is Ia3¯(206). Field emission scanning electron microscopy(FESEM) and specific surface area analyses reveal that the micromorphology of Sm2O3-I fillers is micron plate with silt and its Brunauer-Emmett-Teller(BET) specific surface area(SBET) is 5.15 m2/g, while irregularly shaped Sm2O3-II fillers have two kinds of micromorphology caused by the two phases of Sm2O3-II fillers, which are plate-like agglomeration and agglomeration without specific shape, and the SBET of Sm2O3-II fillers is 2.47 m2/g. The melting temperature (Tp) and yield strength (σy) of the synthesized Sm2O3-I/B4C/HDPE composites are respectively 140.6 °C and 22.6 MPa, which are better than the commercial Sm2O3-II/B4C/HDPE composites. The neutron and gamma radiation shielding tests reveal that the synthesized Sm2O3 fillers with even size and high BET-specific surface area can improve the neutron and gamma radiation shielding performance of composites. 10%Sm2O3-I/20%B4C/70%HDPE(mass fraction) with a thickness of 15 cm has a neutron radiation shielding rate of 98.4% under the 252Cf neutron source and a gamma radiation shielding rate of 71.7% under 137Cs gamma source.

Key words: Sm2O3, Composite material, Neutron, Gamma, Radiation shielding

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