Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2018, Vol. 29 ›› Issue (7): 99 doi: 10.1007/s41365-018-0436-7

• LOW ENERGY ACCELERATOR, RAY AND APPLICATIONS • Previous Articles     Next Articles

Preparation and characterization of Bi2O3/XNBR flexible films for attenuating gamma rays

Yi-Chuan Liao 1 • Dui-Gong Xu 1 • Peng-Cheng Zhang 2   

  1. 1 Institute of Materials, China Academy of Engineering Physics, Jiangyou 621907, China
    2 Science and Technology on Surface Physics and Chemistry Laboratory, Jiangyou 621908, China
  • Contact: Yi-Chuan Liao E-mail:liaoyichuan@caep.cn
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (No. 11405149) and the Military Technology Extension Project (No. JMZF201601).

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Yi-Chuan Liao, Dui-Gong Xu, Peng-Cheng Zhang. Preparation and characterization of Bi2O3/XNBR flexible films for attenuating gamma rays.Nuclear Science and Techniques, 2018, 29(7): 99     doi: 10.1007/s41365-018-0436-7

Abstract:

A bismuth oxide (Bi2O3)-dispersed carboxylated nitrile butadiene rubber (XNBR) flexible film was prepared as a flexible lead-free material for gamma ray (γ-ray) attenuation. However, obtaining a uniform and stable dispersion of Bi2O3 in carboxylated nitrile butadiene rubber latex (XNBRL) is a challenge due to sedimentation induced by the remarkable density differences. Here, this challenge was approached by reducing the Bi2O3 particle radius, increasing the viscosity of the latex, and adding a dispersant. The experimental results confirmed that Bi2O3 was well dispersed in the XNBRL in the concentration range of 30–70 wt%. The mechanical properties demonstrated that the Bi2O3/XNBR flexible films had a good resistance to oil, acid, alkali, and hot air. The linear attenuation coefficients of the Bi2O3/XNBR flexible films obtained from the experiments were in good agreement with the calculated values. The attenuation efficiencies of the Bi2O3/XNBR flexible films with different thicknesses and Bi2O3 contents were investigated for a few different cray energies. These results showed that the Bi2O3/XNBR flexible films have wide application prospects for low-energy γ-ray attenuation.

Key words: Carboxylated nitrile butadiene, Rubber latex, Bi2O3, Gamma ray attenuation, Flexible films