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随着核技术应用的快速发展,对X/γ光子屏蔽材料提出了功能和结构一体化的要求。针对这种需求,设计了一种新型碳纤维增强聚酰亚胺基复合材料。基于Monte Carlo N-Particle Transport Code System(MCNP)模拟了不同PbO含量复合材料的屏蔽性能,根据模拟结果和制备工艺设计了材料并制备,对制备的材料测试了其屏蔽性能、力学性能以及耐辐照性能。通过光子屏蔽实验和力学性能实验发现,该复合材料具有良好的光子屏蔽性能,其在4.80 mm厚度时光子透射率为54.13%,同时材料的弯曲强度和拉伸强度在1.2 mm厚度时达到了263 MPa和369 MPa,在90 kGy辐照后拉伸强度保持率为83.47%,因此该材料在医用及γ射线探伤等工业上有较大的应用潜力。
With the rapid development of the application of nuclear technology, the functional and structural integration requirements of X / γ photonic shielding materials are proposed. In response to this demand, a new type of carbon fiber reinforced polyimide matrix composite has been designed. Based on the Monte Carlo N-Particle Transport Code System (MCNP), the shielding properties of composites with different PbO contents were simulated. The materials were designed and prepared according to the simulation results and the preparation process. The prepared materials were tested for their shielding properties, mechanical properties, According to performance. The results of photon shielding experiments and mechanical properties show that the composite possesses good photonic shielding properties with a photon transmission of 54.13% at a thickness of 4.80 mm and a bending strength and tensile strength of 263 at a thickness of 1.2 mm MPa and 369 MPa, respectively. The retention of tensile strength after irradiation at 90 kGy is 83.47%. Therefore, the material has great potential applications in medical and gamma ray detection.