Investigation of gamma ray attenuation features of bismuth oxide nano powder reinforced high-density polyethylene matrix composites

Abdalsalam, Alyaa H.; Şakar, Erdem; Kaky, Kawa M.; Mhareb, M.H.A.; Şakar, Betül Cevi̇z; Sayyed, M.I.; Gürol, Ali

doi:10.1016/j.radphyschem.2019.108537

Cited by 74 publications

(18 citation statements)

References 38 publications

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“…They concluded that these novel radiation shields can be useful in protection against X-ray energy [ 27 ]. In addition, the applicability of nano-WO 3 , micro-WO 3 , nano-Bi 2 O 3 , and micro-Bi 2 O 3 as X-ray shielding material is mentioned in the literature [ 28 , 29 , 30 , 31 ].…”

Section: Discussionmentioning

confidence: 99%

Designing and Fabricating Nano-Structured and Micro-Structured Radiation Shields for Protection against CBCT Exposure

et al. 2020

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Researchers have always been interested in finding new and effective materials for protection against radiation. This experimental study aimed to design and fabricate new types of nano-material and micro-material based shields against the ionizing effect of cone beam computed tomography (CBCT) X-rays. To fabricate a flexible prototype, we added dioctyl phthalate (DOP) oil to emulsion polyvinyl chloride (PVC) powder. The paste was mixed and dispersed. Then, nano- and micro-powders of WO3 and Bi2O3 were added to the paste, with the weight ratio of 20% PVC, 20% DOP, and 60% nano- and micro-metals. Using an ultrasonic mixer, the polymer matrix and metals were mixed and a paste with a thick texture was developed. The resultant paste was poured into glass molds and the molds were then heated in an oven. After cooling, the resultant sheets were selected for further experiments. A CBCT unit and dosimeter were used to evaluate the characterization and X-ray shielding properties of the fabricated prototypes. The half-value layers (HVL) for nano-WO3, micro-WO3, nano-Bi2O3, and micro-Bi2O3 were 0.0390, 0.0524, 0.0351, and 0.0374 cm, respectively. In addition, the linear attenuation coefficient (µ) for these materials were 17.77, 13.20, 19.71, and 18.5 cm−1, respectively. The findings indicate that nano-structured samples are more effective in the attenuation of X-ray energy. The nano-structured WO3 prototype was nearly 34% more efficient in attenuating radiation compared to the micro-structured WO3 prototype. This difference in nano- and micro-structured Bi2O3 prototypes was 6.5%.

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Section: Discussionmentioning

confidence: 99%

Designing and Fabricating Nano-Structured and Micro-Structured Radiation Shields for Protection against CBCT Exposure

et al. 2020

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“…Several studies on polymer nanocomposites have reported remarkable enhancement in barrier properties, thermal stability, flame resistance, specific strength and modulus, dimensional stability, electro‐optical, and antibacterial properties 10 . Radiation shielding performance of PMCs have also been investigated to examine the effect of filler size 11–14 . Studies on WO 3 /E44 epoxy, low density polyethylene (LDPE) pulverized W reinforced ethylene propylene diene monomer (EPM)/HDPE blend, PbO/HDPE, Bi 2 O 3 /WO 3 /PbO in silicone resin using MCNP code, CdO/HDPE and Bi 2 O 3 /epoxy composites suggest that the use of nano‐scaled fillers is a promising way to achieve enhanced radiation attenuation performance 1,15–19 .…”

Section: Introductionmentioning

confidence: 99%

Thermal, mechanical and γ‐ray shielding properties of micro‐ and nano‐Ta₂O₅ loaded DGEBA epoxy resin composites

Prabhu

Bubbly

2021

J of Applied Polymer Sci

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In this work, we have investigated the synergistic effect of micro‐ and nano‐Ta2O5 fillers in the epoxy matrix on the thermal, mechanical, and radioprotective properties of the composites. Morphological analysis revealed uniform dispersion of fillers in the matrix. Both the thermal stability and tensile properties of matrices have enhanced in the presence of fillers. Although the nanocomposites showed significantly higher tensile strength and Youngs modulus compared to micro‐composites, the enhancement in these properties was predominant at low loadings. Dynamic mechanical analysis indicated good interfacial adhesion and positive reinforcing effect on the matrix even at higher loading (30 wt%) of nano‐Ta2O5. γ‐Ray attenuation studies performed in the energy range of 0.356–1.332 MeV revealed better γ‐ray shielding ability of nanocomposites compared to microcomposites at same weight fraction of fillers. In particular, γ‐ray attenuation at 0.356 MeV for 30 wt% nano‐Ta2O5 loaded epoxy composite was enhanced by around 13% compared to the microcomposite at the same loading. Increased surface‐to‐volume ratio of nanofillers and consequent increase in matrix‐filler adhesion and radiation‐matter interaction have manifested in an overall enhancement in the thermal, mechanical, dynamic mechanical, and radiation shielding characteristics of nano‐Ta2O5/epoxy composites, proving them as promising γ‐ray shields.

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“…Extensive research has been devoted to develop high‐performance polymer matrix composites efficient in attenuating γ‐ray photons. Some of the recently explored polymer matrix composites are ultrahigh molecular weight polyethylene (UHMWPE)/B 4 C/W, polyethylene (PE)/nano‐W, epoxy/W, unsaturated polyester (UP)/Bi 2 O 3 , epoxy/Gd 2 O 3 , high‐density polyethylene (HDPE)/Bi 2 O 3 , epoxy/Bi 2 O 3 /Ta 2 O 5 , and poly(methyl methacrylate) (PMMA)/Bi 2 O 3 4–11 . However, most of these are usually stiff with high moduli making it difficult to process them in wearable form.…”

Section: Introductionmentioning

confidence: 99%

Sodium alginate/bismuth (III) oxide composites for γ‐ray shielding applications

Prabhu

Bubbly

Gudennavar

2020

J of Applied Polymer Sci

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In the present work, we have explored the efficacy of bismuth (III) oxide (Bi2O3) loaded, calcium ion cross‐linked solution cast sodium alginate composite films for radioprotective applications. Calcium ion cross‐linking increased the water and chemical resistance, which further improved on introduction of Bi2O3 into the composites. The 40 wt% Bi2O3 loaded films showed good heat resistance with the peak degradation temperature reaching as high as 251°C. The Bi2O3 loaded composites showed enhanced tensile strength (TS) and Youngs modulus (YM). Compared to high‐modulus polymers like epoxy, high‐density polyethylene (HDPE) and poly (vinyl chloride) (PVC), these exhibit relatively greater extent of stretching before breaking. The γ‐ray attenuation experiments showed that mass attenuation coefficients of the composites at various γ‐ray energies increased with filler loading. These composites are effective in shielding γ‐rays from radioactive sources like 137Cs, 22Na, 133Ba, and 60Co that are widely employed in several medical and industrial applications. The overall enhancement in thermal, mechanical, and radiation shielding characteristics of the composites may be attributed to the uniform distribution of the fillers in alginate matrix. These nontoxic sodium alginate/Bi2O3 composites can be used as soft and biodegradable radiation shields, which may be processed to wearable forms.

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Investigation of gamma ray attenuation features of bismuth oxide nano powder reinforced high-density polyethylene matrix composites

Cited by 74 publications

References 38 publications

Designing and Fabricating Nano-Structured and Micro-Structured Radiation Shields for Protection against CBCT Exposure

Designing and Fabricating Nano-Structured and Micro-Structured Radiation Shields for Protection against CBCT Exposure

Thermal, mechanical and γ‐ray shielding properties of micro‐ and nano‐Ta₂O₅ loaded DGEBA epoxy resin composites

Sodium alginate/bismuth (III) oxide composites for γ‐ray shielding applications

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Investigation of gamma ray attenuation features of bismuth oxide nano powder reinforced high-density polyethylene matrix composites

Cited by 74 publications

References 38 publications

Designing and Fabricating Nano-Structured and Micro-Structured Radiation Shields for Protection against CBCT Exposure

Designing and Fabricating Nano-Structured and Micro-Structured Radiation Shields for Protection against CBCT Exposure

Thermal, mechanical and γ‐ray shielding properties of micro‐ and nano‐Ta2O5 loaded DGEBA epoxy resin composites

Sodium alginate/bismuth (III) oxide composites for γ‐ray shielding applications

Contact Info

Product

Resources

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Thermal, mechanical and γ‐ray shielding properties of micro‐ and nano‐Ta₂O₅ loaded DGEBA epoxy resin composites