Improving the radiation resistance of epoxy resin (EP) is pivotal for the reliability of equipment and the safety of facilities in the nuclear industry. Hexagonal boron nitride (h-BN) is attractive in the preparation of radiation-resistant materials due to its good radiation stability and neutron shielding capability. In this work, h-BN/EP composites with enhanced radiation resistance were fabricated by solution blending. The tensile strength and thermal properties of the composites after γ-ray and neutron irradiation were investigated. The results showed that the addition of h-BN improved the mechanical property and the glassy transition temperature of the resin. The presence of low-level h-BN was favorable to enhance the radiation resistance of EP. As for composites with the 0.05% mass percentage of h-BN, the absorbed dose required to decrease relative tensile strength by 50% was about 300 kGy, which was higher than that of neat EP. The intrinsic mechanism of radiation resistance was attributed to the oxygen barrier effect as investigated by XPS and EPR. Then, benefiting from the absorbing neutrons capability of boron atoms, an addition of 0.55% h-BN to the EP resin could reduce the neutron transmittance of the resin by 5.6%. This study demonstrates that the blending with h-BN can increase the radiation-resistant property of EP resin, meanwhile augmenting the neutron shielding ability.

提高环氧树脂（EP）的耐辐射性对于核工业设备的可靠性和设施的安全至关重要。由于其良好的辐射稳定性和中子屏蔽能力，六方氮化硼（h- BN）在制备抗辐射材料方面具有吸引力。在这项工作中，通过溶液共混制备了具有增强抗辐射性的h -BN/EP 复合材料。研究了γ射线和中子辐照后复合材料的拉伸强度和热性能。结果表明，h- BN的加入提高了树脂的力学性能和玻璃化转变温度。低水平h的存在-BN有利于提高EP的耐辐射性。对于h- BN质量百分比为 0.05% 的复合材料，相对拉伸强度降低 50% 所需的吸收剂量约为 300 kGy，高于纯 EP 的吸收剂量。正如 XPS 和 EPR 所研究的，耐辐射的内在机制归因于氧阻隔效应。然后，受益于硼原子吸收中子的能力，在EP树脂中加入0.55%的h- BN可使树脂的中子透射率降低5.6%。该研究表明，与h- BN共混可以提高EP树脂的抗辐射性能，同时增强中子屏蔽能力。