Polyethylene/Boron Containing Composites for Radiation Shielding Applications

Harrison, Courtney; Burgett, Eric; Hertel, Nolan E.; Grulkel, Eric

doi:10.1002/9780470456248.ch7

Cited by 3 publications

(11 citation statements)

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“…In addition, NASA studied boron-containing multifunctional composites, and they chose high-density polyethylene as the continuous phase and boron carbide and boron nitride as reinforcing fibers. High-density polyethylene outperforms pure polyethylene in tensile modulus, tensile strength, and shielding effect [8].…”

Section: Introductionmentioning

confidence: 93%

Study on the Design, Preparation, and Performance Evaluation of Heat-Resistant Interlayer-Polyimide-Resin-Based Neutron-Shielding Materials

Liu

Sun

et al. 2022

Materials

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Polymers have an excellent effect in terms of moderating fast neutrons with rich hydrogen and carbon, which plays an indispensable role in shielding devices. As the shielding of neutrons is typically accompanied by the generation of γ-rays, shielding materials are developed from monomers to multi-component composites, multi-layer structures, and even complex structures. In this paper, based on the typical multilayer structure, the integrated design of the shield component structure and the preparation and performance evaluation of the materials is carried out based on the design sample of the heat-resistant lightweight polymer-based interlayer. Through calculation, the component structure of the polymer-based materials and the three-layer thickness of the shield are obtained. The mass fraction of boron carbide accounts for 11% of the polymer-based material. Since the polymer-based material is the weak link of heat resistance of the multilayer shield, in terms of material selection and modification, the B4C/TiO2/polyimide molded plate was prepared by the hot-pressing method, and characterization analysis was conducted for its structure and properties. The results show that the ball milling method can mix the materials well and realize the uniform dispersion of B4C and TiO2 in the polyimide matrices. Boron carbide particles are evenly distributed in the material. Except for Ti, the other elemental content of the selected areas for mapping is in good agreement with the theoretical values of the elemental content of the system. The prepared B4C/TiO2/polyimide molded plate presents excellent thermal properties, and its glass transition temperature and initial thermal decomposition temperature are as high as 363.6 °C and 572.8 °C, respectively. In addition, the molded plate has good toughness performs well in compression resistance, shock resistance, and thermal aging resistance, which allows it to be used for a long time under 300 °C. Finally, the prepared materials are tested experimentally on an americium beryllium neutron source. The experimental results match the simulation results well.

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Section: Introductionmentioning

confidence: 93%

Study on the Design, Preparation, and Performance Evaluation of Heat-Resistant Interlayer-Polyimide-Resin-Based Neutron-Shielding Materials

Liu

Sun

et al. 2022

Materials

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“…For shielding applications, NASA has focused on polyethylene shielding properties due to its hydrogen content [3]. Also, NASA has recommended it as reference material for current multifunctional composites toward radiation that is being developed [4,5,16,17]. The basic structures of polyethylene are hydrogen and carbon atoms.…”

Section: • Polyethylenementioning

confidence: 99%

“…Due to hydrogen rich of polyethylene, polyethylene is very widely used in fabrication of radiation shielding materials for aircraft, especially for spacecraft manufactures. Polyethylene may withstand as shielding at the spectrum of gamma-ray [3][4][5][16][17][18][19][20].…”

Section: • Polyethylenementioning

confidence: 99%

“…NASA has claimed that hydrogen is a very effective material to absorb photon and energetic particles occur due to the photon energy interaction with matter [3]. However, the impossibility to produce a structure form fully water, the material which has hydrogen rich became an alternative to be developed on [4,5]. Besides, low Z materials or low atomic number of materials also may be used as alternative due to its capability to absorb radiation and tend to avoid a decay reaction that will give rise of scattered energetic particles [4].…”

Section: Introductionmentioning

confidence: 99%

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The Shielding Materials from EM Radiation for Aircraft Fuselage

Perdana

Al‐Hadi

Bukhari

2016

MSF

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In the last few decades, when travel makes one modest, people prefer air travel instead of car. As such, aircrews and flight passengers are prone to electromagnetic (EM) radiation exposure overtime during flight. Various researches were conducted by the Federal Aviation Agency (FAA) and European Union (EU) in order to understand its details. This paper offers reviews of EM radiation effect to human body in altitude of commercial jet and materials that may provide a convince protection for fuselage structure of aircraft. It was found that Polyethylene (PE) is a convincing material that may absorb EM radiation. NASA has found that lower effective dose toward galactic cosmic rays (GCR) was obtained in PE at 0.1 cSv/day compared to aluminum at 0.125 cSv/day at the same thickness which was 20 g/cm2.

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“…Neutron shielding materials currently developed are mainly composites prepared by blending particles such as boron carbide with matrix polymeric materials such as epoxy resin, 13 polypropylene and polyethylene. 14,15 Application of these materials are restricted due to the inferior physical property such as mechanical and thermal property of the matrix resin, while under some conditions such as in aerospace shielding materials with higher thermal property are desired. Besides, due to the absence of chemical interaction between matrix and boron particles, boron particles blended in the polymer matrix can easily be removed by washing.…”

Section: Introductionmentioning

confidence: 99%

Carborane polyimides, synthesis and characterization

et al. 2014

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Here we report the syntheses of polyimides with meta-carborane cages embedded in the polymer chain and their characterizations. Aromatic carborane diamines were prepared by a Sonogashira reaction in the first place; reaction of the obtained diamines with commercially available dianhydride led to the formation of carborane polyimides with high molecular weight. Thermogravimetric analysis (TGA) of the samples showed that they have excellent thermal stability, with 5 wt% decomposition temperatures (T d5% ) higher than 520 C. Due to the boron-rich nature of the obtained polyimides, samples prepared here have potential applications in the aerospace industry and nuclear power stations as building blocks for neutron shielding and detecting devices.

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Polyethylene/Boron Containing Composites for Radiation Shielding Applications

Cited by 3 publications

References 0 publications

Study on the Design, Preparation, and Performance Evaluation of Heat-Resistant Interlayer-Polyimide-Resin-Based Neutron-Shielding Materials

Study on the Design, Preparation, and Performance Evaluation of Heat-Resistant Interlayer-Polyimide-Resin-Based Neutron-Shielding Materials

The Shielding Materials from EM Radiation for Aircraft Fuselage

Carborane polyimides, synthesis and characterization

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