期刊
APPLIED RADIATION AND ISOTOPES
卷 143, 期 -, 页码 141-148出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.apradiso.2018.10.006
关键词
Gamma ray shielding; Mechanical property; Thermal stability; Epoxy resin; Attenuation coefficient
In this study, a series of Epoxy-Clay-PbO nanocomposites under the name of ECPNCs were prepared by the molding method, and their physico-mechanical properties were investigated by different techniques. Focus of the work, was on the shielding ability of the ECPNCs for the gamma rays, emitted from Ir-192, Cs-137 and Co-60 with a wide range of energy. Scanning electron microscopy, and X-ray diffractometry demonstrated that clay platelets were fully exfoliated, and the PbO particles were homogenously distributed in the polymeric matrix. Thermo-gravimetric analysis and standard tensile tests revealed that PbO content has an increasing/decreasing effect on thermal stability/mechanical strength of the nanocomposites. Gamma shielding experiments showed that efficacy of ECPNCs containing 30 wt% PbO was 47% better than that of concrete. Experimental attenuation data were confirmed by theoretical calculations, so that the maximum difference between them was 14.1%. Furthermore, a correlation was developed between PbO content of the ECPNCs and their mass attenuation coefficient for all gamma sources.
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