面向空间环境的聚乙烯基中子屏蔽复合材料

Polyethylene-Based Composites for Neutron Shielding in Space

轻质、高效的中子屏蔽材料广泛应用在航天工程,用于保障航天员的身体健康与航天器电子设备的正常运行。系统综述了面向空间环境的中子屏蔽聚乙烯基复合材料的研究进展,重点阐述了空间环境下对中子屏蔽材料的需求、含硼/镉物质填充聚乙烯复合材料的中子屏蔽性能与微观结构之间的关系,指出了面向空间环境中子屏蔽材料的重点发展方向:应采用纳米尺度含硼填料与聚乙烯复合,构筑新型纳米复合中子防护材料。

Lightweight and highly efficient neutron shielding materials are widly used in aerospace engineering to ensure the health of astronauts and the normal operation of electronic devices in spacecraft.In this paper,the research progress in polyethylene-based composites for neutron shiel-ding in space were summarized.The basic considerations for neutron shielding materials in space en-vironment,and the structure-property relationship of the boron-filled polyethylene-based composites were discussed in detail.Finally,it was pointed out that polyethylene-based nanocomposites incorpo-rated with nanoscale boron-containing fillers should be adopted to develope the new type high-per-formance neutron shielding materials.