To enhance the interface bonding of polyimide (PI)/carbon fiber (CF) composites, CFs were functionalized by introducing a polydopamine (PDA) transition layer, whose active groups provide absorption sites for the growth of molybdenum disulfide (MoS₂) nanosheets and improve the bonding strength with PI. Uniform and dense MoS₂ nanosheets with thicknesses of 30–40 nm on the surface of the PDA@CF were obtained via a subsequent hydrothermal method. As a result, the interface between the CF and the PI matrix becomes more compact with the help of the PDA transition layer and MoS₂ nanosheets. This is beneficial in forming PI/CF-MoS₂ composites with better thermal stability, higher tensile strength, and enhanced tribological properties. The lubricating and reinforcing effects of the hybrid CF-MoS₂ in the PI composite are discussed in detail. The tensile strength of the PI/CF-MoS₂ composite increases by 43%, and the friction coefficient and the wear rate reduce by 57% and 77%, respectively, compared to those of the pure PI. These values are higher than those of the PI/CF composites without MoS₂ nanosheets. These results indicate that the CF-MoS₂ hybrid material can be used as an additive to improve the mechanical and tribological properties of polymers.

为了增强聚酰亚胺（PI）/碳纤维（CF）复合材料的界面粘结，通过引入聚多巴胺（PDA）过渡层来功能化CF，聚过渡胺（PDA）过渡层的活性基团为二硫化钼（MoS ₂）纳米片的生长提供了吸收位点并得到改善与PI的粘合强度。通过随后的水热法获得了PDA @ CF表面上厚度为30–40 nm的均匀且致密的MoS ₂纳米片。结果，借助PDA过渡层和MoS ₂纳米片，CF和PI基质之间的界面变得更加紧凑。这对形成PI / CF-MoS ₂很有帮助具有更好的热稳定性，更高的拉伸强度和增强的摩擦学性能的复合材料。详细讨论了复合CF-MoS ₂在PI复合材料中的润滑和增强作用。与纯PI相比，PI / CF-MoS ₂复合材料的拉伸强度提高了43％，摩擦系数和磨损率分别降低了57％和77％。这些值高于没有MoS ₂纳米片的PI / CF复合材料的值。这些结果表明，CF-MoS ₂杂化材料可以用作添加剂，以改善聚合物的机械和摩擦学性能。