In order to improve the interfacial bonding between carbon fiber (CF) and polycarbonate (PC), sizing agents of water-borne polycarbonate (WPC) and water-borne polyurethane (WPU) containing carbon nanotubes (CNTs) were used to treat CFs. CNTs were dispersed in the two sizing agents after treated with concentrated nitric acid. The effects of the type of sizing agents and the CNT content on the interfacial properties of composites were investigated by two methods, single fiber fragmentation test (SFFT) for monofilament reinforced composite and transvers tensile for directional bundle composite. Results show that WPU is more conducive to improving the interfacial bonding properties of CF/PC composites because of its better film-forming property than WPC, and the addition of CNTs has a beneficial effect on the interfacial properties of composites when the content of CNTs is 0.1 wt%. Over dose of CNTs causes agglomeration, which is unfavorable for the improvement in interfacial properties. CNTs can effectively prevent interfacial slip, thus significantly improve the interfacial properties in SFFT, while the improvement is not obvious in transvers tensile because the adhesion of the sizing agents plays a leading role.

为了改善碳纤维（CF）和聚碳酸酯（PC）之间的界面结合，使用含有碳纳米管（CNT）的水性聚碳酸酯（WPC）和水性聚氨酯（WPU）的上浆剂处理CF。用浓硝酸处理后，碳纳米管分散在两种上浆剂中。采用单丝增强复合材料的单纤维断裂试验（SFFT）和定向束复合材料的横向拉伸两种方法研究了施胶剂类型和碳纳米管含量对复合材料界面性能的影响。结果表明，WPU比WPC具有更好的成膜性，更有利于提高CF/PC复合材料的界面结合性能，当CNTs的含量为0.1wt%时，CNTs的加入对复合材料的界面性能有有益的影响。碳纳米管用量过多会引起团聚，不利于界面性能的改善。CNTs可以有效防止界面滑移，从而显着改善SFFT的界面性能，而横向拉伸的改善不明显，因为上浆剂的粘附起主导作用。