Flexible gamma ray shielding based on natural Rubber/BaSO4 nanocomposites

Plangpleng, Nattha; Charoenphun, Putthiporn; Polpanich, Duangporn; Sakulkaew, Kartpan; Buasuwan, Nichapa; Onjun, Orasa; Chuamsaamarkkee, Krisanat

doi:10.1016/j.radphyschem.2022.110311

Cited by 17 publications

(3 citation statements)

References 12 publications

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“…Recently, it became clear that science had taken a huge leap forward in the field of nanotechnology, as many researchers have focused on merging it with different materials such as cement and other inexpensive materials to improve the quality and production of the mixture. Plangpleng et al [ 14 ] developed flexible radiation shielding based on NR using BaSO 4 nanocomposites. Nanofillers were present in concentrations at 0, 10, 20, 30, and 50 phr and the results indicated that the increased concentrations of BaSO 4 nanoparticles in NR increased the density, hardness, tensile modulus, tensile strength, and elongation at the break of natural rubber, and the radiation shielding properties were improved.…”

Section: Introductionmentioning

confidence: 99%

Gamma Attenuation Features of White Cement Mortars Reinforced by Micro/Nano Bi2O3 Particles

et al. 2023

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This study aims to explore the radiation protection properties of white mortars based on white cement as a binder and Bi2O3 micro and nanoparticles in proportions of 15 and 30% by weight as replacement sand. The average particle size of micro- and nano-Bi2O3 was measured using a transmission electron microscope (TEM). The cross-sectional morphology and distribution of Bi2O3 within the samples can be obtained by scanning electron microscopy (SEM), showing that nanoscale Bi2O3 particles have a more homogeneous distribution within the samples than microscale Bi2O3 particles. The shielding parameters of the proposed mortars were measured using the HPGe detector at various γ-ray energies emitted by standard radioactive point sources 241Am, 133Ba, 60Co, 137Cs, and 152Eu. The experimental values of the prepared mortars’ mass attenuation coefficients (MAC) match well with those determined theoretically from the XCOM database. Other shielding parameters, including half value layer (HVL), tenth value layer (TVL), mean free path (MFP), effective electron density (Neff), effective atomic number (Zeff), equivalent atomic number (Zeq), and exposure buildup factor (EBF), were also determined at different photon energies to provide more shielding information about the penetration of gamma radiation into the selected mortars. The obtained results indicated that the sample containing 30% by weight of nano Bi2O3 has the largest attenuation coefficient value. Furthermore, the results show that the sample with a high concentration of Bi2O3 has the highest equivalent atomic numbers and the lowest HVL, TVL, MFP, and EBF values. Finally, it can be concluded that Bi2O3 nanoparticles have higher efficiency and protection compared to microparticles, especially at lower gamma-ray energies.

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Section: Introductionmentioning

confidence: 99%

Gamma Attenuation Features of White Cement Mortars Reinforced by Micro/Nano Bi2O3 Particles

et al. 2023

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“…This is because nano-sized fillers can disperse more uniformly and with less agglomeration inside the polymer matrix compared to micro-sized fillers 17 – 19 . Plangpleng et al 20 demonstrated that the NR filled with BaSO 4 nanoparticles provided better gamma radiation shielding than the ordinary-sized BaSO 4 due to the large surface to volume area of nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Novel slag/natural rubber composite as flexible material for protecting workers against radiation hazards

El-Khatib,

Doma,

Abbas

et al. 2023

Sci Rep

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This work is an attempt to employ the electric arc furnace (EAF) slag as a by-product material to develop an alternative and environmentally friendly material for gamma-radiation protection applications such as in medical and industrial areas. For this purpose, different concentrations of micro-sized EAF slag (0, 20, 40, 60, 80, 100, 500, and 800 phr) were incorporated as fillers in the natural rubber (NR) matrix to produce the shielding composites. In addition, nano-sized EAF slag particles were prepared by using a high-energy ball milling technique to investigate the effect of particle size on the gamma-radiation shielding properties. The synthesized micro and nano EAF/NR composites were tested as protective materials against gamma-radiation by employing NaI(Tl) scintillation detector and standard radioactive point sources (152Eu, 137Cs, 133Ba, and 60Co). Different shielding parameters such as linear and mass attenuation coefficient, half value layer (HVL), tenth value layer, mean free path, effective atomic number (Zeff), and effective electron density (Neff) were determined to assess the radiation shielding capability of the EAF/NR composites. Furthermore, equivalent atomic number (Zeq) and the exposure buildup factor values for photon energy in the range from 0.015 to 15 MeV were also computed by Geometric Progression method. The experimental results of micro EAF/NR composites showed that at 121.78 keV, EAF0 composite (without EAF slag content) had the lowest μ value of 0.1695 cm−1, while the EAF800 composite (which was loaded with 800 phr of micro EAF slag) had the highest μ value of 0.2939 cm−1 at the same energy, which in turn decreases the HVL from 4.09 to 2.36 cm, respectively. Therefore, increasing the filler weight fractions of EAF slag in the NR matrix, increases the shielding properties of the composites. Moreover, the NR composite reinforced with 800 phr of nano EAF slag has better gamma-radiation shielding efficiency compared to that filled with 800 phr of micro EAF slag. The success of this work was to prepare a flexible, lightweight, low-cost, and lead-free material with better shielding capability.

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“…In a previous study, NR demonstrated its ability to attenuate radiation sufficiently more highly than other polymers [15]. Numerous works have been carried out to demonstrate flexible radiation shielding materials using metal oxide as filler and NR as the matrix, namely Sb 2 O 3 [16], BaSO 4 [17], Pb and Pb/W [18], bismuth oxide (Bi 2 O 3 ) [19], Gd 2 O 2 S [20] and magnetite (Fe 3 O 4 ) [21]. Indonesia, the world's second-largest NR producer after Thailand, contributes 27 % of global production [22].…”

Section: Introduction mentioning

confidence: 99%

Some Metal Oxide-Natural Rubber Composites for Gamma- and Low-Energy X-Ray Radiation Shielding

et al. 2023

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This work studied protective material consisting of several metal oxide composites (Pb3O4, WO3, SnO2, and Bi2O3)-natural rubber (NR) for X-ray and gamma-ray shielding. The composites were prepared through open milling and vulcanization processes and further characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), rheometry analysis, and density gauge. The attenuation coefficient of the sample was investigated using X-ray generators with voltages ranging from 50 to 140 kV and gamma-ray energies ranging and 356 to 1250 keV, respectively. The experimental results show that the linear attenuation coefficient of NR filled with metal oxides was significantly improved compared to pure NR. For gamma-ray 661 keV, the HVL of NR decreased from 9.0 cm to between 4.4 - 6.2 cm after it was filled with metal oxides. The Bi2O3-NR is the best suitable material for gamma-ray attenuation, followed by Pb3O4-NR, WO3-NR, and SnO2-NR. Meanwhile, for x-rays, the HVL of NR decreased from 2.0 cm to between 0.17 -0.31 cm after it was filled with metal oxides. The proposed metal oxide-NR composites can be appropriate as a flexible protective material for manufacturing wearable radiation shielding products such as gloves, aprons, rubber underwear, and other wearable materials.

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Flexible gamma ray shielding based on natural Rubber/BaSO4 nanocomposites

Cited by 17 publications

References 12 publications

Gamma Attenuation Features of White Cement Mortars Reinforced by Micro/Nano Bi2O3 Particles

Gamma Attenuation Features of White Cement Mortars Reinforced by Micro/Nano Bi2O3 Particles

Novel slag/natural rubber composite as flexible material for protecting workers against radiation hazards

Some Metal Oxide-Natural Rubber Composites for Gamma- and Low-Energy X-Ray Radiation Shielding

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