针对高放射性、高温、高湿环境，研制一种耐高温、隔热且轻质的环氧树脂基耐高温隔热屏蔽材料。该屏蔽材料以三官能度缩水甘油胺型环氧树脂和酚醛环氧树脂为基体，二氨基二苯砜和二乙基甲苯二胺作为混合固化剂，纳米核壳橡胶结构的环氧树脂为增韧剂，碳化硼为中子屏蔽添加剂。制备出的耐高温隔热屏蔽材料密度小于2.0 g/cm3，负荷热变形温度>190℃，导热系数<0.3 W/(m·k)，湿热材料弯曲强度相对变化率小于5%，有效解决了传统屏蔽结构及聚乙烯基屏蔽材料不耐高温问题，且质轻、成本可控，能够满足工程实践应用。
Aiming at the environment of high radioactivity, high temperature and high humidity, a kind of high temperature resistant, heat insulation and lightweight epoxy resin based heat insulation shielding material was developed. The shielding material uses trifunctional glycidyl amine epoxy resin and phenolic epoxy resin as the matrix, diaminodiphenyl sulfone and diethyltoluene diamine as the mixed curing agent, epoxy resin with nano core shell rubber structure as the toughening agent, and boron carbide as the neutron shielding additive. The density of the prepared high-temperature resistant and thermal insulation shielding material is less than 2.0 g/cm3, the load thermal deformation temperature is more than 190℃, the thermal conductivity is less than 0.3 W/(m · k), and the relative change rate of the bending strength of the damp heat material is less than 5%. It effectively solves the problem that the traditional shielding structure and polyethylene based shielding material are not resistant to high temperature, and it is light in weight and controllable in cost, which can meet the engineering practice application.
2023,45(13): 59-64 收稿日期：2022-10-31
DOI：10.3404/j.issn.1672-7649.2023.13.012
分类号：TL328
作者简介：李晓玲(1984-)，女，博士，高级工程师，研究方向为辐射防护设计及屏蔽材料
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