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Rare-earth-based flexible nuclear radiation protection material, and preparation method and application thereof

A protective material and base flexible technology, applied in the field of nuclear radiation protection, can solve the problems of secondary pollution of heavy metals such as pipelines, equipment, lead, etc., inconvenient operation and maintenance, etc., and achieve good radiation protection effect and compactness Good effect with high processing cost

Inactive Publication Date: 2018-04-13
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the existing flexible shielding materials is that the neutron shielding performance of heavy metals is weak, and after it is combined with other materials, in order to achieve a certain shielding effect, a thicker thickness is required, resulting in a certain gap during installation and use , cannot completely wrap pipelines and equipment; at the same time, it also makes operation and maintenance inconvenient, and there is also the problem of secondary pollution of heavy metals such as lead

Method used

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  • Rare-earth-based flexible nuclear radiation protection material, and preparation method and application thereof
  • Rare-earth-based flexible nuclear radiation protection material, and preparation method and application thereof
  • Rare-earth-based flexible nuclear radiation protection material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A material with neutron shielding effect, consisting of the following components in parts by weight:

[0027] Gadolinium trioxide: 60 parts

[0028] KH-550: 1 serving

[0029] Polydimethylsiloxane: 0.3 parts

[0030] KH-550 is used as a coupling agent, and polydimethylsiloxane is used as a defoamer.

[0031] The preparation method proceeds as follows:

[0032] (1) Weigh a sufficient amount of Gd with a particle size of 200-400 mesh 2 o 3 The powder was dried in an oven at 80°C for 12 hours to obtain a dry powder, and 60 parts of Gd 2 o 3 Powder;

[0033] (2) Mix the powder obtained in step (1) with 1 part of KH-550 and 0.3 part of polydimethylsiloxane, and stir at a speed of 1500 rpm for 2 hours until fully mixed to obtain a surface-treated The core radiation protection material (Ⅰ);

[0034] (3) Weigh 100 parts of water-based acrylic resin, add the material (I) obtained in step (2) into it, and mechanically stir it at a speed of 1500 rpm for 10 minutes to full...

Embodiment 2

[0037] The difference between this example and Example 1 is that the material (I) and acrylic resin are mixed uniformly to obtain a slurry, which is uniformly coated on the base cloth, and then a layer of PE film is adhered to the surface, and then heated at 50°C Drying under air blast for 4 hours, a raw material (Ⅲ) of a rare earth-based flexible nuclear radiation protection wrapping tape with a sandwich structure was obtained.

Embodiment 3

[0039] The difference between this example and Example 1 is that after obtaining material (I), weigh 100 parts of methyl silicone rubber (raw rubber) or polyimide masterbatch, mix and extrude at 150°C , forming, to produce rubber and plastic products (Ⅳ) that meet different needs and have radiation protection and temperature resistance.

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Abstract

The invention relates to a rare-earth-based flexible nuclear radiation protection material, and a preparation method and application thereof. The nuclear radiation protection material is a medium-heavy rare earth powder coated with a coupling agent and a defoamer, and the medium-heavy rare earth powder has a particle size less than 10 microns, the coupling agent is 0.5-2.0% the mass of the total medium-heavy rare earth powder, and the defoamer is 0.2-1.0% the weight of the total heavy rare earth powder. During the preparation, a medium-heavy rare earth powder is dried, and the dried medium-heavy rare-earth powder is coated with the coupling agent and the defoamer. According to the present invention, the rare earth composite material with good neutron absorption performance, no secondary radiation pollution, light weight and cheap price is selected for replacing an existing heavy metal composite material, and medium-heavy rare earth is used as a neutron absorption body for preparing theradiation protection product. The neutron shielding performance is higher than the shielding performance of traditional lead, boron carbide and other heavy elements; the protection effect on gamma ray is superior to those of lead, boron carbide and other heavy elements, and the protection material disclosed by the invention has good nuclear radiation shielding performance, mechanical properties and construction performance, and has advantages of crack resistance, corrosion resistance and heat resistance.

Description

technical field [0001] The invention belongs to the technical field of nuclear radiation protection, and in particular relates to a rare earth-based flexible nuclear radiation protection material and a preparation method and application thereof. Background technique [0002] Nuclear power generation is currently the most important form of peaceful use of nuclear energy. While nuclear energy brings huge economic and social benefits to mankind, it also has certain radiation hazards. Radiation exposure in nuclear energy applications comes from various radionuclides produced during the operation of nuclear energy generating devices (such as nuclear power plants). The core of nuclear power safety is to prevent the leakage of radioactive fission products in the reactor to the surrounding environment. The occasions that require radiation protection in nuclear power plant installations are mainly divided into two categories: one is the high-energy radiation protection of nuclear r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21F1/10G21F3/00
CPCG21F1/103G21F3/00
Inventor 余锡宾王行王锡树
Owner SHANGHAI NORMAL UNIVERSITY
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