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Nano‐W Dispersed Gamma Radiation Shielding Materials
Author(s) -
Kim Jaewoo,
Seo Duckbong,
Lee Byung Chul,
Seo Young Soo,
Miller William H.
Publication year - 2014
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201400127
Subject(s) - materials science , nano , polyethylene , composite material , attenuation , polymer , electromagnetic shielding , transmission electron microscopy , ball mill , composite number , adhesive , scanning electron microscope , radiation , nanoparticle , nanotechnology , optics , physics , layer (electronics)
We present a nano‐W dispersed polymer composite whose gamma attenuation is greatly enhanced. In situ pulverization and simultaneous encapsulation of polyethylene (PE) onto the nano‐W particles was successfully performed by ball milling. Adhesive encapsulation of PE was observed by means of interstitial diffusion of atomic W at the boundary using transmission electron microscope. Prepared nano‐W/PE particles were dispersed into ethylene‐propylene‐based polymer mixture using melt mixing. Attenuation of gammas for the nano‐W composites was enhanced up to ∼75% for Ba‐133 (∼0.3 MeV) compared to the micro‐W composites, while it decreases as the photon energy increases. MCNP simulation also shows similar gamma attenuation behaviors.