Self-healable soft shield for γ-ray radiation based on polyacrylamide hydrogel composites

Abstract With the growing risk of radiation exposure, there are growing interests in radiation shielding. Because most radiation shields are made from heavy metals, a need to develop a soft shield is raised to protect human body. However, because the shield can easily undergo a mechanical damage by...

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Autores principales:	Jinwoo Park, Minseok Kim, Sooseok Choi, Jeong-Yun Sun
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/305bfef7844d41a79e8bea6afb1db478
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spelling	oai:doaj.org-article:305bfef7844d41a79e8bea6afb1db4782021-12-02T16:18:03ZSelf-healable soft shield for γ-ray radiation based on polyacrylamide hydrogel composites10.1038/s41598-020-78663-x2045-2322https://doaj.org/article/305bfef7844d41a79e8bea6afb1db4782020-12-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-78663-xhttps://doaj.org/toc/2045-2322Abstract With the growing risk of radiation exposure, there are growing interests in radiation shielding. Because most radiation shields are made from heavy metals, a need to develop a soft shield is raised to protect human body. However, because the shield can easily undergo a mechanical damage by an impact, it would be better to have self-repairing system in the shield. Here, we have fabricated an intrinsic self-healable soft shield for gamma ray by making acrylamide based hydrogel composite. The composite contains lead dioxide nanoparticles for gamma ray shielding and Laponite clays for self-repairing. Although the hydrogel contained a large amount of lead dioxide nanoparticles (3.23 M), the fabricated composites stretched beyond 1400% while showing a high attenuation coefficient of 0.1343 cm−1 against gamma ray from a cobalt-60 source. Then a systematic study was performed to analyze self-healing properties and the 96.55% of maximum self-healing efficiency was obtained. We also analyzed a storage modulus of hydrogel and molecular weight of polyacrylamide to study an effect of gamma ray on the self-healing. The self-healing efficiency was decreased by a gamma ray because the radiation induces scissioning or covalent crosslinking in the chains.Jinwoo ParkMinseok KimSooseok ChoiJeong-Yun SunNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-8 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jinwoo Park Minseok Kim Sooseok Choi Jeong-Yun Sun Self-healable soft shield for γ-ray radiation based on polyacrylamide hydrogel composites
description	Abstract With the growing risk of radiation exposure, there are growing interests in radiation shielding. Because most radiation shields are made from heavy metals, a need to develop a soft shield is raised to protect human body. However, because the shield can easily undergo a mechanical damage by an impact, it would be better to have self-repairing system in the shield. Here, we have fabricated an intrinsic self-healable soft shield for gamma ray by making acrylamide based hydrogel composite. The composite contains lead dioxide nanoparticles for gamma ray shielding and Laponite clays for self-repairing. Although the hydrogel contained a large amount of lead dioxide nanoparticles (3.23 M), the fabricated composites stretched beyond 1400% while showing a high attenuation coefficient of 0.1343 cm−1 against gamma ray from a cobalt-60 source. Then a systematic study was performed to analyze self-healing properties and the 96.55% of maximum self-healing efficiency was obtained. We also analyzed a storage modulus of hydrogel and molecular weight of polyacrylamide to study an effect of gamma ray on the self-healing. The self-healing efficiency was decreased by a gamma ray because the radiation induces scissioning or covalent crosslinking in the chains.
format	article
author	Jinwoo Park Minseok Kim Sooseok Choi Jeong-Yun Sun
author_facet	Jinwoo Park Minseok Kim Sooseok Choi Jeong-Yun Sun
author_sort	Jinwoo Park
title	Self-healable soft shield for γ-ray radiation based on polyacrylamide hydrogel composites
title_short	Self-healable soft shield for γ-ray radiation based on polyacrylamide hydrogel composites
title_full	Self-healable soft shield for γ-ray radiation based on polyacrylamide hydrogel composites
title_fullStr	Self-healable soft shield for γ-ray radiation based on polyacrylamide hydrogel composites
title_full_unstemmed	Self-healable soft shield for γ-ray radiation based on polyacrylamide hydrogel composites
title_sort	self-healable soft shield for γ-ray radiation based on polyacrylamide hydrogel composites
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/305bfef7844d41a79e8bea6afb1db478
work_keys_str_mv	AT jinwoopark selfhealablesoftshieldforgrayradiationbasedonpolyacrylamidehydrogelcomposites AT minseokkim selfhealablesoftshieldforgrayradiationbasedonpolyacrylamidehydrogelcomposites AT sooseokchoi selfhealablesoftshieldforgrayradiationbasedonpolyacrylamidehydrogelcomposites AT jeongyunsun selfhealablesoftshieldforgrayradiationbasedonpolyacrylamidehydrogelcomposites
_version_	1718384222646829056

Self-healable soft shield for γ-ray radiation based on polyacrylamide hydrogel composites

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