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- Title
Nano-W Dispersed Gamma Radiation Shielding Materials.
- Authors
Kim, Jaewoo; Seo, Duckbong; Lee, Byung Chul; Seo, Young Soo; Miller, William H.
- Abstract
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.
- Subjects
COMPOSITE materials; GAMMA rays; ELECTROMAGNETIC waves; RADIATION shielding; NUCLEAR engineering safety measures
- Publication
Advanced Engineering Materials, 2014, Vol 16, Issue 9, p1083
- ISSN
1438-1656
- Publication type
Article
- DOI
10.1002/adem.201400127