This study investigated the effects of carbon nanofibers (CNFs) content on hygrothermal ageing behaviors and mechanisms of flax fiber-reinforced epoxy (FFRE) laminates. CNFs/FFRE laminates containing 0.25–2.0 wt% CNFs were fabricated and immersed in distilled water for 180 days. Water absorption and tensile as well as thermodynamic properties were investigated. The research results showed that CNFs played a significant role in the improvement of hygrothermal properties of FFRE laminates. The water uptake of CNFs/FFRE laminates was significantly decreased because CNFs improved water barrier properties of the laminates. The improvements of tensile and thermodynamic properties of CNFs/FFRE laminates were attributed to the fact that CNFs strengthened the interface bonding and enhanced the matrix’s stability. This study demonstrates that adding appropriate amount of CNFs into FFRE laminates is beneficial to improving the hygrothermal durability of FFRE laminates.

这项研究调查了碳纳米纤维（CNFs）含量对亚麻纤维增强环氧树脂（FFRE）层压板的湿热老化行为和机理的影响。制作了含有0.25–2.0 wt％CNF的CNF / FFRE层压板，并将其浸入蒸馏水中180天。研究了吸水，拉伸以及热力学性质。研究结果表明，CNF在改善FFRE层压板的湿热性能方面起着重要作用。CNF / FFRE层压板的吸水率明显降低，因为CNF改善了层压板的阻水性能。CNF / FFRE层压板的拉伸性能和热力学性能的改善归因于CNF增强了界面结合并增强了基体的稳定性。