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Flexible oxidized graphene hydrogel neutron radiation shielding material and preparation method thereof

A technology of radiation shielding and oxide stone, which is applied in the field of nuclear radiation protection, can solve the problems of low mechanical properties and inflexibility, and achieve the effects of simple preparation process, high neutron shielding performance and high elasticity

Inactive Publication Date: 2018-04-06
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these disclosed hydrogel radiation protection materials do not have the characteristics of flexibility, and have low mechanical properties, so they are not suitable for applications where flexible shielding materials are required for similar protective clothing.

Method used

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  • Flexible oxidized graphene hydrogel neutron radiation shielding material and preparation method thereof
  • Flexible oxidized graphene hydrogel neutron radiation shielding material and preparation method thereof
  • Flexible oxidized graphene hydrogel neutron radiation shielding material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] (1) Preparation of aqueous solution: dissolving acrylic acid in deionized water to obtain acrylic acid aqueous solution; dissolving one or several neutron functional shielding components in water; dissolving polyvinyl alcohol in deionized water at 100°C ;

[0027] (2), mixing of solutions: after cooling the polyvinyl alcohol solution obtained in step (1) to 50° C., add the aqueous acrylic acid solution obtained in step (1), stir with a magnetic stirrer for 1 minute and mix evenly;

[0028] (3) Add neutron functional shielding components: Add the aqueous solution containing neutron functional shielding components to the graphene oxide aqueous solution, stir at high speed with a magnetic stirrer for 2 minutes, put it into the reaction kettle and react at 200°C for 48 Hour, put into the solution of step 2 gained after using;

[0029] (4) Preliminary reaction: Add initiator and crosslinking agent under nitrogen protection and react at constant temperature at 45°C for 0.5 h...

Embodiment 1

[0034] The weight of each component of the flexible graphene oxide hydrogel neutron radiation shielding material of the present invention is as follows:

[0035]

[0036] The preparation method of the flexible graphene oxide hydrogel neutron radiation shielding material of the present invention, the steps are as follows:

[0037] (1) Preparation of aqueous solution: Dissolve 95g of acrylic acid in 200ml of deionized water to obtain an aqueous solution of acrylic acid, dissolve 8g of boric acid in 100mL of water, and dissolve 10g of polyvinyl alcohol in 200mL of deionized water at 100°C;

[0038] (2), mixing of solutions: after cooling the polyvinyl alcohol solution obtained in step (1) to 50° C., add the aqueous acrylic acid solution obtained in step (1), stir with a magnetic stirrer for 1 minute and mix evenly;

[0039] (3) Adding neutron shielding components: add the aqueous solution in which the neutron functional shielding components are dissolved to the graphene oxide ...

Embodiment 2

[0047] The weight of each component of the flexible graphene oxide hydrogel neutron radiation shielding material of the present invention is as follows:

[0048]

[0049] The preparation method of the flexible graphene oxide hydrogel neutron radiation shielding material of the present invention, the steps are as follows:

[0050] (1) Preparation of aqueous solution: Dissolve 90g of acrylic acid in 200ml of deionized water to obtain an aqueous solution of acrylic acid, dissolve 6g of boric acid and 6g of lithium sulfate in 100mL of water, and dissolve 15g of polyvinyl alcohol in 200mL of deionized water at 100°C ;

[0051] (2), mixing of solutions: after cooling the polyvinyl alcohol solution obtained in step (1) to 50° C., add the aqueous acrylic acid solution obtained in step (1), stir with a magnetic stirrer for 1 minute and mix evenly;

[0052] (3) Adding neutron shielding components: add the aqueous solution in which the neutron functional shielding components are diss...

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Abstract

The invention discloses a flexible oxidized graphene hydrogel neutron radiation shielding material and a preparation method thereof. The material is prepared from a polymer, oxidized graphene, a neutron function shielding component and an additive. The polymer is formed by crosslinking of polyvinyl alcohol and acrylic acid. The neutron function shielding component is boric acid. The additive comprises an initiator ammonium sulfate and a crosslinking agent N,N-methylene bisacrylamide. The oxidized graphene is monolayer oxidized graphene or multilayer oxidized graphene or the combination of monolayer oxidized graphene and multilayer oxidized graphene on the basis of the different proportion. Water solutions of the components are prepared and sequentially mixed, a sealing reaction is performed under the constant temperature, dialysis is performed, and finally the product is obtained. The flexible oxidized graphene hydrogel neutron radiation shielding material and the preparation method have the advantages that the material is flexible, high in neutron shielding performance, excellent in mechanical performance and high in elasticity, the preparation technology is simple, and the material can be adopted as the material for a neutron shielding protective garment.

Description

Technical field: [0001] The invention belongs to the field of nuclear radiation protection and the technical field of preparation of nuclear radiation shielding materials, in particular to a flexible graphene oxide hydrogel neutron radiation shielding material and a preparation method thereof. Background technique: [0002] With the development of nuclear science and technology and the increasingly wide application fields, it is inevitable for personnel to work in the field of neutron radiation, and neutrons will cause great harm to the human body. Clothing is very necessary to protect the human body. In addition, some mechanical equipment with complex shapes also need flexible neutron shielding materials for protection. [0003] Traditional neutron shielding materials are mainly heavy metals, boron-containing polyethylene and concrete. But none of these materials are characterized by flexibility and high elasticity. In recent years, a series of new polymer matrix neutron...

Claims

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Application Information

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IPC IPC(8): G21F1/02G21F1/10C08F261/04C08F220/06C08J3/075
CPCG21F1/103C08F261/04C08J3/075C08J2351/00G21F1/026C08F220/06
Inventor 陈飞达张云陈托汤晓斌
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS