Silicone-rubber-based flexible neutron shield material and preparation method thereof

Abstract

The invention discloses a silicone-rubber-based flexible neutron shield material and a preparation method thereof. The silicone-rubber-based flexible neutron shield material comprises, by weight, 100parts of phenyl silicone rubber base material, 128-174 parts of functional boride and 15-23 parts of hydroxyl silicone oil compound. The silicone-rubber-based flexible neutron shield material and thepreparation method thereof have the advantages that the phenyl silicone rubber having certain irradiation resistance is used as the matrix, the processed functional boride is evenly dispersed into thephenyl silicone rubber, and gamma radiation crosslinking is performed to obtain the silicone-rubber-based flexible radiation shield material excellent in comprehensive performance; the flexible material has an excellent neutron shield effect and good mechanical and thermal performance and environment friendliness and can be cut into optional shapes according actual application scenes.

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 silicon rubber-based flexible neutron shielding material and a preparation method thereof. Background technique [0002] With the rapid development of new energy technology, non-destructive testing technology, advanced medical imaging and diagnosis and treatment technology, radiation technology has been widely used in many fields of the national economy, bringing great benefits to social development and progress and human production and life. All kinds of radiation, especially neutron-related safety protection issues have attracted increasing attention. It is very important and urgent to develop its shielding materials to minimize the various hazards of radiation. [0003] Concrete and other traditional shielding materials, as well as anti-radiation plexiglass (Singh V P, Bandiger NM, Chanthima N, Evaluation of gamma...

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Problems solved by technology

[0003] Concrete and other traditional shielding materials, as well as anti-radiation plexiglass (Singh V P, Bandiger NM, Chanthima N, Evaluation of gamma-ray exposure buildup factors and neutronshielding for bismuth borosilicate glasses, Radiation Physics and Chemistry, 2014,98(1):14 -21), lead-boron polyethylene (Zhang S J, Cao X B, Luan Y Q, Preparation and properties of smart thermal control and radiation protection materials formula-functional structure of small spacecraft, J Mater Sci Technol, 2011,27(10):879- 884), metal-based boron-containing materials (Wu Gaohui, Jiang Longtao, Xu Zhongguo. A preparation method for neutron-absorbing materials. CN 105200274 A, 2015. Wang Wenxian, Chen Hongsheng, Huang Zheyuan. A preparation method for copper-based neutron-absorbing materials. CN105950897 A.), etc., all do not have good flexibility, and although the neutron protection fiber has good flexibility, its shielding performance is relatively weak. For the special needs of soft radiation protection materials, it is urgent to study new materials with excellent neutron shielding performance and good flexibility to meet the specific needs of actual use

[0004] 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. Chen Feida, Zhang Yun, Chen Tuo. A flexible graphene oxide hydrogel neutron radiation shielding material and its preparation method. CN107887046 A, 2018.), but as a neutron shielding material, its service environment is often accompanied by relatively high levels of radiation in addition to radiation High temperature, which requires that the material itself must also have good radiation resistance and heat resistance. At the same time, the material itself also needs to have a certain degree of cleanliness, otherwise it will cause damage to the surrounding environment or components due to the release of substances during use. Potential safety risk or corrosion hazard