Synthesis and characterization of Polyethylene/B4C composite, and its neutron shielding performance in cementitious materials: Experimental and simulation studies

Park, Jae-Yeon; Her, Sungwun; Cho, Seong-Min; Woo, Seung Min; Bae, Sungchul

doi:10.1016/j.cemconcomp.2022.104458

Cited by 39 publications

(3 citation statements)

References 57 publications

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“…First, B 4 C (BC) particles as neutron shielding fillers have been superficially modified with polymaleic acid (PMA) to form a typical core− shell structure BC@PMA. 30 Then, BC@PMA/PVA fibers with as high as 50 wt % BC particles are first fabricated with wet spinning. 31 Second, 70 wt % PWO@SMA/PVA fibers for γ-ray shielding are prepared according to our previous work.…”

Section: Introductionmentioning

confidence: 99%

“…In this study, we present a new type of multilayer fabric containing densely packed PVA fibers that possess the capability to simultaneously shield neutrons and γ-rays while allowing for air and water vapor permeability. First, B 4 C (BC) particles as neutron shielding fillers have been superficially modified with polymaleic acid (PMA) to form a typical core–shell structure BC@PMA . Then, BC@PMA/PVA fibers with as high as 50 wt % BC particles are first fabricated with wet spinning .…”

Section: Introductionmentioning

confidence: 99%

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Large-Scale Fabrication of Highly Filled Polymer Fibers for Radiation Protection Safety and Wear Comfort of Multilayer Fabrics in Complex Radiations

Meng,

Zhang,

Mai

et al. 2024

ACS Appl. Polym. Mater.

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Developing wearable articles with radiation protection safety and wear comfort in complex radiations is one of the urgent issues because flourishing nuclear technologies lead to increasing radiation threats. However, current wearable articles either shield neutrons or γ-rays or display poor permeability of air and water vapor and so on, which leads to difficulty in satisfying the requirements of complex radiations. Herein, surface modification techniques are applied to construct sufficient hydrogen bonds between functional particles (B 4 C and PbWO 4 ) and PVA matrixes for intensifying the interface interaction, which facilitate the smooth wet spinning of as high as 50 wt % B 4 C/ PVA and 70 wt % PbWO 4 /PVA fibers under an exclusive pilot line for large-scale preparation. Then, both of the highly filled PVA fibers are woven into two kinds of fabrics that are overlapped for multilayer fabrics. They jointly shield neutrons and γ-rays while giving good permeability of air and water vapor. The overlapping two-layer B 4 C/PVA and two-layer PbWO 4 /PVA fabrics are provided with 72.90% thermal neutron adsorption (0.025 eV) and 38.62% γ-ray attenuation (105 keV). In addition, they also display 155.88 mm/s and 2536.37 g/m 2 •24 h air and water vapor permeabilities, respectively. Besides, good flexibility of the fabrics is not sacrificed in spite of the extremely high loading of functional particles in PVA fibers. This work provides a feasible approach to deal with the challenge of radiation protection safety and wear comfort of wearable articles in complex radiations.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Large-Scale Fabrication of Highly Filled Polymer Fibers for Radiation Protection Safety and Wear Comfort of Multilayer Fabrics in Complex Radiations

Meng,

Zhang,

Mai

et al. 2024

ACS Appl. Polym. Mater.

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“…Conventional methods were unable to simultaneously enhance the content of both hydrogen and boron atoms in the materials. Exploring a method that simultaneously considers multiple performances was challenging. − …”

Section: Introductionmentioning

confidence: 99%

Preparation of Structural Heat-and-Radiation-Resistant Integrated Epoxy by Constructing a Carborane-Hybridized Cross-Linked Network

Xu,

Zhao,

Chen

et al. 2024

Macromolecules

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The polymer materials in nuclear facilities are exposed to high temperatures, radiation, and high loads. Their excellent heat resistance, radiation resistance, and shielding properties are important for the safe operation of nuclear facilities. In this study, 1,2-bis(hydroxymethyl)carborane (CBOH) was first synthesized in large quantities through water extraction and then introduced into an epoxy resin cross-linked network. The incorporation of a carborane structure significantly improved the heat resistance of epoxy. Under air atmosphere, the T 5% (the temperature at 5 wt % degradation), T 10% (the temperature at 10 wt % degradation), and char yield at 800 °C of the materials were 315.67 °C (16.51 °C increased), 326.29 °C (12.96 °C increased), and 33.22% (33.22% increased), respectively. The maximum decomposition temperature of the material increased from 550 to 750 °C, and 7.05 wt % of the carbon constituent was protected after thermal degradation at 800 °C. The glass transition temperature (T g ) of the materials greatly increased up to over 300 °C after introducing the carborane structure into the networks. The radiation resistance of the material was enhanced due to the in situ capture of oxygen radicals by the carborane structure. Moreover, the incorporation of carborane structure also increased the content of H and B in materials, improving their neutron-shielding capability. This work confers multifunctionality to epoxy resin and enhances its various properties, ensuring the safety of epoxy resin in nuclear facilities.

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Photoreduction of Cr(VI) on B4C/AgFe2O4 composite

Köysüren

Köysüren²

2022

J Sol-Gel Sci Technol

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Synthesis and characterization of Polyethylene/B4C composite, and its neutron shielding performance in cementitious materials: Experimental and simulation studies

Cited by 39 publications

References 57 publications

Large-Scale Fabrication of Highly Filled Polymer Fibers for Radiation Protection Safety and Wear Comfort of Multilayer Fabrics in Complex Radiations

Large-Scale Fabrication of Highly Filled Polymer Fibers for Radiation Protection Safety and Wear Comfort of Multilayer Fabrics in Complex Radiations

Preparation of Structural Heat-and-Radiation-Resistant Integrated Epoxy by Constructing a Carborane-Hybridized Cross-Linked Network

Photoreduction of Cr(VI) on B4C/AgFe2O4 composite

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