Neutron shield material with flame-retardant neutron shield heat-shielding performance and preparation method thereof

A technology of shielding materials and neutrons, which is applied in the field of neutron shielding materials and its preparation, can solve the problems of weak neutron shielding ability, poor flexibility, and no flame retardancy, and achieve good thermal neutron shielding performance and high thermal neutron shielding performance. Effect of sub-absorption cross-section and high mechanical strength

Active Publication Date: 2015-07-01
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional neutron radiation protective clothing uses multi-layer neutron protective fiber cloth as the main material, which is heavy, poor in flexibility, weak in neutron shielding ability, and does not have flame retardancy and heat insulation performance. Fire protection requirements; traditional hard polymer shielding materials cannot change randomly with the size of the environment and the shape of the equipment, and do not have flame retardant performance, which brings certain difficulties and risks to the protection of nuclear equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The formula of the neutron shielding material with flame-retardant and heat-insulating properties is: 100g of methyl vinyl silica gel with a hardness of 5HA, B 4 C powder 90g, SiO 2 8.2g of hollow microspheres, 48g of zinc borate powder, 0.5g of bis-pentasulfurizing agent, and 1g of KH-540 coupling agent. where B 4 C powder particle size 50um, SiO 2 The particle size of hollow microbeads is 25um, and the particle size of zinc borate powder is 2.5um.

[0020] The steps of the preparation method of the neutron shielding material with flame-retardant and heat-insulating properties are as follows:

[0021] (1) Plastic refining of methyl vinyl silica gel matrix material: adjust the distance between the double rollers of the open mill to 2mm, and the rotation speed to 45r / min. Put it into the double roller room for masticating, and the masticating time is 3 minutes. Add 1g of vulcanizing agent Shuang25 to the above-mentioned methyl vinyl silica gel and continue masticati...

Embodiment 2

[0031] The formula of the neutron shielding material with flame-retardant and heat-insulating properties is: 100g of methyl vinyl silica gel with a hardness of 5HA, B 4 C powder 53.5g, TiO 2 4.8g of hollow microspheres, 28.3g of zinc borate powder, 2g of bis-pentasulfurizing agent, and 3g of KH-550 coupling agent. where B 4 C powder particle size 50um, TiO 2 The particle size of hollow microbeads is 20um, and the particle size of zinc borate powder is 2.5um.

[0032] The steps of the preparation method of the neutron shielding material with flame-retardant and heat-insulating properties are as follows:

[0033] (1) Plastic refining of methyl vinyl silica gel matrix material: adjust the distance between the double rollers of the open mill to 2mm, and the speed of 45r / min. Carry out masticating between two rollers, the masticating time is 4 minutes. Add a certain amount of vulcanizing agent 225 to the methyl vinyl silica gel and continue masticating for 14 minutes, duri...

Embodiment 3

[0043] The formula of the neutron shielding material with flame-retardant and heat-insulating properties is: 100g of methyl vinyl silica gel with a hardness of 5HA, B 4 C powder 30g, Al 2 o 3 2.7g of hollow microspheres, 15.8g of zinc borate powder, 3g of bis-pentasulfurizing agent, and 5g of aminopropyltrimethoxysilane. where B 4 C powder particle size 50um, Al 2 o 3 The particle size of hollow microbeads is 30um, and the particle size of zinc borate powder is 2.5um.

[0044] The steps of the preparation method of the neutron shielding material with flame-retardant and heat-insulating properties are as follows:

[0045](1) Plastic refining of methyl vinyl silica gel matrix material: adjust the distance between the double rollers of the open mill to 2mm, and the speed of 45r / min. Carry out mastication between the double rollers, and the mastication time is 5 minutes. Add a certain amount of vulcanizing agent bis-2-5 into the methyl vinyl silica gel and continue masticat...

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Abstract

The invention discloses a neutron shield material with flame-retardant neutron shield heat-shielding performance and a preparation method thereof. The material is prepared from dimethylvinyl silica gel, a neutron absorber material, a flame-retardant functional filler, a heat-shielding functional filler, vulcanizing agent 2,5-dimethyl-2,5-dihexane and a powder surface modifier. The method comprises the steps of adding the dimethylvinyl silica gel and vulcanizing agent 2,5-dimethyl-2,5-dihexane in an open mill for plastication, then mixing the mixture and the neutron absorber material, the flame-retardant functional filler, the heat-shielding functional filler as well as the powder surface modifier, adding the mixed solution in a vacuum internal mixer for banburying, and finally adding a product obtained after the banburying into a press vulcanizer to obtain the neutron shield material with the flame-retardant neutron shield heat-shielding performance. The material has the thermal neutron shielding performance, and has good tenacity, flame-retardance, heat-shielding performance and mechanical strength, peripheral protection of nuclear instruments with complicated shaped can be met, and the material is also a good core material for neutron protection clothing.

Description

technical field [0001] The invention relates to a neutron shielding material with flame-retardant and heat-insulating properties and a preparation method thereof, belonging to the field of nuclear radiation protection and the technical field of preparation of nuclear radiation shielding materials. technical background [0002] As the application of nuclear technology plays an increasingly important role in energy conservation and environmental protection, resource exploration, radiation processing, medical diagnosis, and national defense and military affairs, the number of radioactive practitioners has also increased. But while bringing convenience and enjoyment to people, various rays also bring harm to human beings to some extent. Therefore, it is necessary to reduce the occupational exposure level of practitioners in various radioactive activities and ensure the life and health of radiation practitioners. extremely important. [0003] The traditional neutron radiation pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08K13/06C08K9/06C08K7/24C08K7/26C08K7/28C08K3/22C08K3/16C08K3/38C08K3/02G21F1/10
Inventor 汤晓斌柴浩倪敏轩陈飞达陈达
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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