B4C/NRL flexible films for thermal neutron shielding

Liao, Yingdi; Xu, Duigong; Zhang, Pengcheng

doi:10.1007/s41365-018-0358-4

Cited by 10 publications

(4 citation statements)

References 34 publications

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“…Upon comparing the variation of absorption capacity with the thickness of our hybrid films with those of previously reported materials 17 , 21 , 23 , 24 , 34 , 46 – 51 , our films were found to have excellent neutron-shielding performances at ultralow thicknesses (Fig. 4c ).…”

Section: Resultsmentioning

confidence: 56%

“…The tensile strength gradually decreased with the increase in the B 4 C fraction. Nevertheless, the MBP 20 and MBP 40 composite films still maintained good mechanical properties, comparable to those of other neutron-shielding B 4 C composite coatings or flexible films 17 , 34 . When compared to a commercially available resin-based shielding material (Mirrotron, Mirrobor TM ), our MBP film showcased lower thickness and higher mechanical strength, suggesting a reduced mechanical degradation rate as a coating material (Supplementary Fig.…”

Section: Resultsmentioning

confidence: 71%

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Robust 2D layered MXene matrix–boron carbide hybrid films for neutron radiation shielding

Han,

Seok,

Jin

et al. 2023

Nat Commun

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Large-scale fabrication of neutron-shielding films with flexible or complex shapes is challenging. Uniform and high boron carbide (B4C) filler loads with sufficient workability are needed to achieve good neutron-absorption capacity. Here, we show that a two-dimensional (2D) Ti3C2Tx MXene hybrid film with homogeneously distributed B4C particles exhibits high mechanical flexibility and anomalous neutron-shielding properties. Layered and solution-processable 2D Ti3C2Tx MXene flakes serve as an ideal robust and flexible matrix for high-content B4C fillers (60 wt.%). In addition, the preparation of a scalable neutron shielding MXene/B4C hybrid paint is demonstrated. This composite can be directly integrated with various large-scale surfaces (e.g., stainless steel, glass, and nylon). Because of their low thickness, simple and scalable preparation method, and an absorption capacity of 39.8% for neutrons emitted from a 241Am9Be source, the 2D Ti3C2Tx MXene hybrid films are promising candidates for use in wearable and lightweight applications.

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Section: Resultsmentioning

confidence: 56%

Section: Resultsmentioning

confidence: 71%

Robust 2D layered MXene matrix–boron carbide hybrid films for neutron radiation shielding

Han,

Seok,

Jin

et al. 2023

Nat Commun

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“…In other words, personal protective equipment (PPE) plays a crucial role in both current and future contexts. Rubber matrix composites containing heavy metal elements such as lead (Pb) and tungsten (W) are often used in the production of PPE. − The high-density electron cloud unique to heavy metal elements such as Pb and W increases the possibility of collisions between high-energy photons and electrons, thus achieving the purpose of radiation shielding. − In addition, the flexibility of the rubber matrix composites meets the conditions for the use of PPE. − However, due to the poor air permeability of rubber-based PPE, gas exchange cannot be carried out on both sides of PPE, and it is difficult for nuclear-related personnel to effectively dissipate heat when working, making it impossible for workers to wear PPE for a long time, thereby reducing wearing comfort and productivity. , Therefore, it is imperative to develop air-permeable flexible materials that can enhance both the wearing comfort and radiation safety aspects of PPE.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Nano-PbWO₄ Particles by Polymaleic Acid Modification: A Highly Filled Nonwoven Membrane Used To Improve the Wearing Comfort and Radiation Safety of γ-ray Protection Products

Meng,

Mai,

Wang

et al. 2024

Ind. Eng. Chem. Res.

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Personal protective equipment (PPE) is an important wearable device for people exposed to radiation because of its comfort and safety. Unfortunately, ordinary PbWO 4 (PWO) particles cannot uniformly prepare highly filled composites; therefore, we prepared PWO@PMA nanoparticles by a simple precipitation method using polymaleic acid (PMA). Then, a highly filled PWO@PMA/PVA nonwoven membrane is obtained by solution mixing and electrospinning. In the PWO@PMA/PVA nonwoven membrane, PWO@PMA is evenly dispersed and has good compatibility with the PVA interface. All nonwoven membranes prepared by the stable electrospinning method have ideal mechanical properties. Importantly, the prepared PWO@ PMA/PVA nonwoven membrane can not only shield γ-rays but also has good air permeability. The 70 wt % PWO@PMA/PVA nonwoven membrane has a γ-ray shielding rate of 42.16% (105 keV) and an air permeability of 17.1 mm/s. This study provides a practical and effective method for the production of nonwoven membranes with high polymer content and provides a promising opportunity to enhance the wearing comfort of PPE.

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“… That is, neutron shielding materials require substances with large neutron absorption cross sections such as boron and heavy metals to attenuate secondary γ-rays . Therefore, developing wearable articles bearing heavy metals and boron-containing substances is of vital importance to the radiation protection safety of human being in complex radiations. , …”

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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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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B4C/NRL flexible films for thermal neutron shielding

Cited by 10 publications

References 34 publications

Robust 2D layered MXene matrix–boron carbide hybrid films for neutron radiation shielding

Robust 2D layered MXene matrix–boron carbide hybrid films for neutron radiation shielding

Preparation of Nano-PbWO₄ Particles by Polymaleic Acid Modification: A Highly Filled Nonwoven Membrane Used To Improve the Wearing Comfort and Radiation Safety of γ-ray Protection Products

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

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B4C/NRL flexible films for thermal neutron shielding

Cited by 10 publications

References 34 publications

Robust 2D layered MXene matrix–boron carbide hybrid films for neutron radiation shielding

Robust 2D layered MXene matrix–boron carbide hybrid films for neutron radiation shielding

Preparation of Nano-PbWO4 Particles by Polymaleic Acid Modification: A Highly Filled Nonwoven Membrane Used To Improve the Wearing Comfort and Radiation Safety of γ-ray Protection Products

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

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Product

Resources

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Preparation of Nano-PbWO₄ Particles by Polymaleic Acid Modification: A Highly Filled Nonwoven Membrane Used To Improve the Wearing Comfort and Radiation Safety of γ-ray Protection Products