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Foam type low-density silicone rubber-based flexible neutron shielding material and preparation method thereof

A shielding material and low-density technology, which is applied in the field of foam-type low-density silicone rubber-based flexible neutron shielding materials and its preparation, can solve the problems of unfavorable portability and limited flexibility, and achieve good environmental friendliness, good mechanical strength and Effects of temperature resistance and excellent neutron shielding effect

Active Publication Date: 2021-04-16
INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In recent years, flexible shielding materials have been reported (Chai H, Tang X B, Ni M X, Preparation and properties of flexible flame-retardant neutron shielding material based onmethyl vinyl silicone rubber, Journal of Nuclear Materials, 2015, 464: 210-215. Song Hongtao, Zhang Xingquan, Gao Xiaoling. A kind of silicon rubber flexible neutron shielding material and its preparation method. CN 109825088 A, 2019.), but these materials are due to high density (both greater than 1.0g / cm3), so its flexibility is relatively limited, and it is also unfavorable for portable use

Method used

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  • Foam type low-density silicone rubber-based flexible neutron shielding material and preparation method thereof
  • Foam type low-density silicone rubber-based flexible neutron shielding material and preparation method thereof
  • Foam type low-density silicone rubber-based flexible neutron shielding material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0055] A foam-type low-density silicone rubber-based flexible neutron shielding material, its formula includes: 150g of phenyl silicone rubber compound, 78g of neutron absorber, 15g of interface fusion agent, and 300g of density regulator by weight;

[0056] The preparation method of the foam-type low-density silicone rubber-based flexible neutron shielding material comprises the following steps:

[0057] Step 1. Put 200g of phenyl silicone rubber with a phenyl content of 4.2% into a double-roll mill, add 20g of white carbon black at 50°C, and knead for 10 minutes to make a phenyl silicone rubber mix. use;

[0058] Step 2. Take a mixture of cubic boron nitride and simple boron with a mass ratio of 25:1, grind it for 15 minutes, and then bake it at 80°C for 4 hours to be used as a neutron absorber;

[0059] Step 3. Take hydroxyl silicone oil and trimethylolpropane trimethacrylate with a mass ratio of 3:2, and then place them in a vacuum drying oven at room temperature and 1KPa...

Embodiment 2

[0088] A foam-type low-density silicone rubber-based flexible neutron shielding material, its formula includes: 150g of phenyl silicone rubber compound, 183g of neutron absorber, 26g of interface fusion agent, and 250g of density regulator by weight;

[0089] The preparation method of the foam-type low-density silicone rubber-based flexible neutron shielding material comprises the following steps:

[0090] Step 1. Put 200g of phenyl silicone rubber with a phenyl content of 7% into a double-roll mill, add 20g of white carbon black at 50°C, and knead for 10 minutes to make a phenyl silicone rubber mix. use;

[0091] Step 2. Take a mixture of cubic boron nitride and simple boron with a mass ratio of 35:9, grind it for 15 minutes, and then bake it at 80° C. for 4 hours, and use it as a neutron absorber;

[0092] Step 3. Take hydroxyl silicone oil and trimethylolpropane trimethacrylate with a mass ratio of 10:3, and then place them in a vacuum drying oven at room temperature and 1...

Embodiment 3

[0098] A foam-type low-density silicone rubber-based flexible neutron shielding material, its formula includes: 100g of phenyl silicone rubber compound, 155g of neutron absorber, 20g of interface fusion agent, and 100g of density regulator by weight;

[0099] The preparation method of the foam-type low-density silicone rubber-based flexible neutron shielding material comprises the following steps:

[0100] Step 1: Take 100g of raw phenyl silicone rubber with a phenyl content of 4% and put it into a double-roll mill, add 10g of white carbon black at 40°C, and knead for 10 minutes to make phenyl silicone rubber. Glue ready for use;

[0101] Step 2: Take the hexagonal boron nitride solid, grind it for 10 minutes, and then bake it at 110°C for 2 hours as a neutron absorber for use;

[0102] Step 3. Take hydroxyl silicone oil and trimethylolpropane trimethacrylate according to the mass ratio of 4:1, and then place them in a vacuum drying oven at room temperature and 10KPa for 12 h...

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Abstract

The invention discloses a foam type low-density silicone rubber-based flexible neutron shielding material and a preparation method thereof, and the formula of the material comprises the following components in parts by weight: 100 parts of phenyl silicone rubber compound, 35-155 parts of a neutron absorbing agent, 7.5-18 parts of an interface fusion agent and 100-200 parts of a density regulator. Silicone rubber is adopted as a matrix, a certain amount of a neutron absorbing agent, an interface fusion agent and a density regulator are added respectively, and the low-density flexible neutron shielding material with excellent comprehensive performance can be obtained through radiation cross-linking, solvent-out pore forming and freeze drying. The material not only has an excellent neutron shielding effect, but also has light weight, high toughness and environmental friendliness, and can be tailored in any form according to an actual use scene.

Description

technical field [0001] The invention belongs to the technical field of special rubber materials and advanced composite materials, and in particular relates to a foam-type low-density silicon rubber-based flexible neutron shielding material and a preparation method thereof. Background technique [0002] Due to its excellent neutron shielding performance and good flexibility, the flexible neutron shielding material is especially suitable for the peripheral protection of nuclear facilities / equipment components with complex shapes in actual scenarios, and it is easy to cut into various shapes suitable for use. [0003] In recent years, flexible shielding materials have been reported (Chai H, Tang X B, Ni M X, Preparation and properties of flexible flame-retardant neutron shielding material based on methyl vinyl silicone rubber, Journal of Nuclear Materials, 2015, 464:210-215. Song Hongtao, Zhang Xingquan, Gao Xiaoling. A flexible silicon rubber neutron shielding material and its...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08K13/06C08K3/02C08K3/38C08K7/26C08K5/21C08J3/28C08J3/24C08J9/28G21F1/10
Inventor 宋宏涛张行泉高小铃李新喜李昊陈喜平蹇源谢雷沈杭杨桂霞连启会
Owner INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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