Nuclear Science and Techniques ›› 2018, Vol. 29 ›› Issue (7):
• LOW ENERGY ACCELERATOR, RAY AND APPLICATIONS •
Yi-Chuan Liao 1 • Dui-Gong Xu 1 • Peng-Cheng Zhang 2
This work was supported by the National Natural Science Foundation of China (No. 11405149) and the Military Technology Extension Project (No. JMZF201601).
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.
Carboxylated nitrile butadiene,
Gamma ray attenuation,
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