Surface modified-gadolinium/boron/polyethylene composite with high shielding performance for neutron and gamma-ray

A series of surface modified-gadolinium/boron/polyethylene composites composed of surface modified fillers (M−microGd2O3 and M−nanoGd2O3) are prepared for shielding neutron and gamma radiation. Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), energy dispersive X-r...

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Autores principales:	Zhipeng Huo, Sheng Zhao, Guoqiang Zhong, Hong Zhang, Liqun Hu
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Surface modification Gadolinium oxide Composite Neutron Gamma-ray Radiation protection Nuclear engineering. Atomic power TK9001-9401
Acceso en línea:	https://doaj.org/article/45a9d7014c7f48aa907ddd9f0c491ffb
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spelling	oai:doaj.org-article:45a9d7014c7f48aa907ddd9f0c491ffb2021-11-28T04:33:18ZSurface modified-gadolinium/boron/polyethylene composite with high shielding performance for neutron and gamma-ray2352-179110.1016/j.nme.2021.101095https://doaj.org/article/45a9d7014c7f48aa907ddd9f0c491ffb2021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2352179121001617https://doaj.org/toc/2352-1791A series of surface modified-gadolinium/boron/polyethylene composites composed of surface modified fillers (M−microGd2O3 and M−nanoGd2O3) are prepared for shielding neutron and gamma radiation. Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), energy dispersive X-ray energy spectrometer (EDS) reveal that the surface modification of fillers significantly improved the interfacial compatibility and dispersion in the polyethylene matrix. Thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and mechanical tensile tests show that the modification of nanoGd2O3 and microGd2O3 improve the thermal stability and mechanical property of the composites. The T5% (initial decomposition temperature), Tp (endothermic peak temperatures) and Tensile strength of 10wt% M-nanoGd2O3/20wt% B4C/70wt% HDPE reachs 463.5℃,137.2℃, and 19.6MPa, which is greatly improved compared with unmodified materials and neat HDPE. The neutron and gamma shielding mechanism of the composites is studied both by experimental measurements and Monte Carlo simulation. The results show that the improved interfacial compatibility and dispersion of fillers in the polyethylene matrix effectively enhances the neutron and gamma shielding rate. The shielding performance of the composite blended with M−nanoGd2O3 is significantly better than that of the composite blended with M−microGd2O3 and the unmodified materials with the relatively thin thickness. Finally, a superior composite containing 10 wt% M−nanoGd2O3/20 wt% B4C/70 wt% HDPE reaches a neutron shielding rate of 90% at 9.1 cm under Cf-252 environment, and a gamma shielding rate of 70% at 13.7 cm under Cs-137 environment, which have the characteristics of lead free, low specific gravity and high shielding performance and is expected to be a promising radiation shielding materials used in neutron-gamma mixed fields.Zhipeng HuoSheng ZhaoGuoqiang ZhongHong ZhangLiqun HuElsevierarticleSurface modificationGadolinium oxideCompositeNeutronGamma-rayRadiation protectionNuclear engineering. Atomic powerTK9001-9401ENNuclear Materials and Energy, Vol 29, Iss , Pp 101095- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Surface modification Gadolinium oxide Composite Neutron Gamma-ray Radiation protection Nuclear engineering. Atomic power TK9001-9401
spellingShingle	Surface modification Gadolinium oxide Composite Neutron Gamma-ray Radiation protection Nuclear engineering. Atomic power TK9001-9401 Zhipeng Huo Sheng Zhao Guoqiang Zhong Hong Zhang Liqun Hu Surface modified-gadolinium/boron/polyethylene composite with high shielding performance for neutron and gamma-ray
description	A series of surface modified-gadolinium/boron/polyethylene composites composed of surface modified fillers (M−microGd2O3 and M−nanoGd2O3) are prepared for shielding neutron and gamma radiation. Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), energy dispersive X-ray energy spectrometer (EDS) reveal that the surface modification of fillers significantly improved the interfacial compatibility and dispersion in the polyethylene matrix. Thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and mechanical tensile tests show that the modification of nanoGd2O3 and microGd2O3 improve the thermal stability and mechanical property of the composites. The T5% (initial decomposition temperature), Tp (endothermic peak temperatures) and Tensile strength of 10wt% M-nanoGd2O3/20wt% B4C/70wt% HDPE reachs 463.5℃,137.2℃, and 19.6MPa, which is greatly improved compared with unmodified materials and neat HDPE. The neutron and gamma shielding mechanism of the composites is studied both by experimental measurements and Monte Carlo simulation. The results show that the improved interfacial compatibility and dispersion of fillers in the polyethylene matrix effectively enhances the neutron and gamma shielding rate. The shielding performance of the composite blended with M−nanoGd2O3 is significantly better than that of the composite blended with M−microGd2O3 and the unmodified materials with the relatively thin thickness. Finally, a superior composite containing 10 wt% M−nanoGd2O3/20 wt% B4C/70 wt% HDPE reaches a neutron shielding rate of 90% at 9.1 cm under Cf-252 environment, and a gamma shielding rate of 70% at 13.7 cm under Cs-137 environment, which have the characteristics of lead free, low specific gravity and high shielding performance and is expected to be a promising radiation shielding materials used in neutron-gamma mixed fields.
format	article
author	Zhipeng Huo Sheng Zhao Guoqiang Zhong Hong Zhang Liqun Hu
author_facet	Zhipeng Huo Sheng Zhao Guoqiang Zhong Hong Zhang Liqun Hu
author_sort	Zhipeng Huo
title	Surface modified-gadolinium/boron/polyethylene composite with high shielding performance for neutron and gamma-ray
title_short	Surface modified-gadolinium/boron/polyethylene composite with high shielding performance for neutron and gamma-ray
title_full	Surface modified-gadolinium/boron/polyethylene composite with high shielding performance for neutron and gamma-ray
title_fullStr	Surface modified-gadolinium/boron/polyethylene composite with high shielding performance for neutron and gamma-ray
title_full_unstemmed	Surface modified-gadolinium/boron/polyethylene composite with high shielding performance for neutron and gamma-ray
title_sort	surface modified-gadolinium/boron/polyethylene composite with high shielding performance for neutron and gamma-ray
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/45a9d7014c7f48aa907ddd9f0c491ffb
work_keys_str_mv	AT zhipenghuo surfacemodifiedgadoliniumboronpolyethylenecompositewithhighshieldingperformanceforneutronandgammaray AT shengzhao surfacemodifiedgadoliniumboronpolyethylenecompositewithhighshieldingperformanceforneutronandgammaray AT guoqiangzhong surfacemodifiedgadoliniumboronpolyethylenecompositewithhighshieldingperformanceforneutronandgammaray AT hongzhang surfacemodifiedgadoliniumboronpolyethylenecompositewithhighshieldingperformanceforneutronandgammaray AT liqunhu surfacemodifiedgadoliniumboronpolyethylenecompositewithhighshieldingperformanceforneutronandgammaray
_version_	1718408312179916800

Surface modified-gadolinium/boron/polyethylene composite with high shielding performance for neutron and gamma-ray

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