Radiation shielding properties of silicon polymers

Nagaraja, N.; Manjunatha, H. C.; Seenappa, L.; Sridhar, K.N.; Ramalingam, H.B.

doi:10.1016/j.radphyschem.2020.108723

Cited by 64 publications

(18 citation statements)

References 27 publications

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“…The X-ray and gamma radiation shielding properties of silicon polymers such as polymer A-poly dimethyl siloxane (C 2 H 6 OSi), polymer B-polymethyl hydro-siloxane (CH 4 SiO), polymer C-per hydro-polysiloxane (H 3 SiN), polymer D-poly dimethyl siloxane (C 2 H 6 Si), polymer E-methylsilses quinoxaline (C 12 H 32 O 8 Si 8 ), and polymer F-silalkalyene polymer (SiC 3 H 8 ) were studied. So that polymethyl hydro-siloxane (CH 4 SiO) possessed the lowest values of half-value layer, tenth value layer and mean free path (HVL, TVL, and λ), and the highest attenuation coefficient (Nagaraja et al 2020 ). Another type of polymer blends was prepared via compression molding, where MCNP5 simulation geometry would be suitable to study the radiation shielding performance of polyamide 6/acrylonitrile butadiene styrene blends against gamma rays for various energies (Abdel-Haseiba et al 2018 ).…”

Section: Polymers Used In Radiological Protectionmentioning

confidence: 99%

Polymeric composite materials for radiation shielding: a review

et al. 2021

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The rising use of radioactive elements is increasing radioactive pollution and calling for advanced materials to protect individuals. For instance, polymers are promising due to their mechanical, electrical, thermal, and multifunctional properties. Moreover, composites made of polymers and high atomic number fillers should allow to obtain material with low-weight, good flexibility, and good processability. Here we review the synthesis of polymer materials for radiation protection, with focus on the role of the nanofillers. We discuss the effectivness of polymeric materials for the absorption of fast neutrons. We also present the recycling of polymers into composites.

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Section: Polymers Used In Radiological Protectionmentioning

confidence: 99%

Polymeric composite materials for radiation shielding: a review

et al. 2021

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“…These changes are attributed to two phenomena: degradation by excision of the polymeric chain due to the breaking of covalent bonds or the crosslinking of chains due to the formation of free radicals that induce the generation of new chemical bonds [45]. On the other hand, polymers based on silicon showed that the perhydro poly siloxane possesses higher shielding properties in the range between 84 keV and 1.3 MeV compared with other siloxane-based polymers such as poly dimethyl siloxane [46].…”

Section: Effect Of He-emr On Polymersmentioning

confidence: 99%

A Brief Review on the High-Energy Electromagnetic Radiation-Shielding Materials Based on Polymer Nanocomposites

Acevedo-Del-Castillo

Águila-Toledo

Maldonado-Magnere

et al. 2021

IJMS

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This paper revises the use of polymer nanocomposites to attenuate high-energy electromagnetic radiation (HE-EMR), such as gamma radiation. As known, high-energy radiation produces drastic damage not only in facilities or electronic devices but also to life and the environment. Among the different approaches to attenuate the HE-EMR, we consider the use of compounds with a high atomic number (Z), such as lead, but as known, lead is toxic. Therefore, different works have considered low-toxicity post-transitional metal-based compounds, such as bismuth. Additionally, nanosized particles have shown higher performance to attenuate HE-EMR than those that are micro-sized. On the other hand, materials with π-conjugated systems can also play a role in spreading the energy of electrons ejected as a consequence of the interaction of HE-EMR with matter, preventing the ionization and bond scission of polymers. The different effects produced by the interactions of the matter with HE-EMR are revised. The increase of the shielding properties of lightweight, flexible, and versatile materials such as polymer-based materials can be a contribution for developing technologies to obtain more efficient materials for preventing the damage produced for the HE-EMR in different industries where it is found.

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“…For related details on µ, μ/ρ, Z eff , N eff , HVL, TVL, MFP, and RPE parameters, including Z eq and a five parameter G–P fitting approximation for EBFs and EABFs computation, one can review Refs. [ 8 , 9 , 10 , 11 , 27 , 29 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 ], as these perspectives are not restated in this part. Likewise, specifics on ‘ Σ R ’ and related expressions can be found elsewhere [ 8 , 9 , 22 , 27 , 45 ].…”

Section: Methodsmentioning

confidence: 99%

“…It is vital to explore definite parameters, such as linear attenuation coefficient ( μ ), mass attenuation coefficient (μ/ρ), effective atomic number ( Z eff ), effective electron density ( N eff ), half-value layer (HVL), tenth-value layer (TVL), mean free path (MFP), radiation protection efficiency (RPE), equivalent atomic number ( Z eq ), exposure buildup factor (EBF), and energy absorption buildup factor (EABF) for γ -rays and other quantities, such as macroscopic effective removal cross-sections for fast neutrons ( Σ R ), scattering cross-sections (coherent ( σ cs ) and incoherent (σ ics )), and absorption cross-section ( σ A ), including total cross-section ( σ T ) for slow or thermal neutrons, by utilizing appropriate experimental procedures or theoretical and simulation methods to test glasses [ 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 22 ], glass ceramics [ 23 ], ceramics [ 24 ], metallic glasses [ 25 ], concretes [ 26 , 27 ], steels [ 28 ], alloys [ 29 , 30 , 31 ], and polymers [ 32 , 33 ], etc. for radiation shielding.…”

Section: Introductionmentioning

confidence: 99%

Detailed Inspection of γ-ray, Fast and Thermal Neutrons Shielding Competence of Calcium Oxide or Strontium Oxide Comprising Bismuth Borate Glasses

Lakshminarayana

Elmahroug

Kumar³

et al. 2021

Materials

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For both the B2O3-Bi2O3-CaO and B2O3-Bi2O3-SrO glass systems, γ-ray and neutron attenuation qualities were evaluated. Utilizing the Phy-X/PSD program, within the 0.015–15 MeV energy range, linear attenuation coefficients (µ) and mass attenuation coefficients (μ/ρ) were calculated, and the attained μ/ρ quantities match well with respective simulation results computed by MCNPX, Geant4, and Penelope codes. Instead of B2O3/CaO or B2O3/SrO, the Bi2O3 addition causes improved γ-ray shielding competence, i.e., rise in effective atomic number (Zeff) and a fall in half-value layer (HVL), tenth-value layer (TVL), and mean free path (MFP). Exposure buildup factors (EBFs) and energy absorption buildup factors (EABFs) were derived using a geometric progression (G–P) fitting approach at 1–40 mfp penetration depths (PDs), within the 0.015–15 MeV range. Computed radiation protection efficiency (RPE) values confirm their excellent capacity for lower energy photons shielding. Comparably greater density (7.59 g/cm3), larger μ, μ/ρ, Zeff, equivalent atomic number (Zeq), and RPE, with the lowest HVL, TVL, MFP, EBFs, and EABFs derived for 30B2O3-60Bi2O3-10SrO (mol%) glass suggest it as an excellent γ-ray attenuator. Additionally, 30B2O3-60Bi2O3-10SrO (mol%) glass holds a commensurably bigger macroscopic removal cross-section for fast neutrons (ΣR) (=0.1199 cm−1), obtained by applying Phy-X/PSD for fast neutrons shielding, owing to the presence of larger wt% of ‘Bi’ (80.6813 wt%) and moderate ‘B’ (2.0869 wt%) elements in it. 70B2O3-5Bi2O3-25CaO (mol%) sample (B: 17.5887 wt%, Bi: 24.2855 wt%, Ca: 11.6436 wt%, and O: 46.4821 wt%) shows high potentiality for thermal or slow neutrons and intermediate energy neutrons capture or absorption due to comprised high wt% of ‘B’ element in it.

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Radiation shielding properties of silicon polymers

Cited by 64 publications

References 27 publications

Polymeric composite materials for radiation shielding: a review

Polymeric composite materials for radiation shielding: a review

A Brief Review on the High-Energy Electromagnetic Radiation-Shielding Materials Based on Polymer Nanocomposites

Detailed Inspection of γ-ray, Fast and Thermal Neutrons Shielding Competence of Calcium Oxide or Strontium Oxide Comprising Bismuth Borate Glasses

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