In this paper, a modified epoxy emulsifier (MEE) was synthesised for preparing an aqueous epoxy sizing agent, which was used to reinforce interfacial adhesion of carbon fibre (CF)/epoxy composites. The sizing agent was evenly wrapped on the fibre surface with tiny particles, as well as increased the surface roughness of fibres; meanwhile, the activated carbon atoms on the surface of sized CF were further increased, as confirmed via SEM, AFM and XPS. The contact angle (CA) of fibres was observed via drop-on-fibre system. The results showed that the wettability of CF was significantly improved and the CA of CF was reduced by approximately 23°. According to the single-fibre fragmentation test, the interfacial shear strength of sized CF/EP composites increased by 70%–76%. The improvement of interfacial adhesion could be mainly attributed to the generation of chemical interaction bonds and the interface mechanical interlock of CF and the epoxy matrix.

本文合成了一种改性环氧乳化剂（MEE），用于制备水性环氧上浆剂，该增强剂用于增强碳纤维（CF）/环氧树脂复合材料的界面粘合力。上浆剂被细小颗粒均匀地包裹在纤维表面，并增加了纤维的表面粗糙度。同时，如通过SEM，AFM和XPS所证实的，CF尺寸的表面上的活性碳原子进一步增加。纤维的接触角（CA）是通过纤维滴落系统观察到的。结果表明，CF的润湿性得到显着改善，CF的CA降低了约23°。根据单纤维破碎测试，CF / EP胶料的界面剪切强度提高了70％–76％。