To improve the interfacial properties between carbon fiber (CF) and epoxy resin (EP), T300 carbon fibers were coated with multi-walled carbon nanotubes (MWCNTs) using aqueous suspension deposition method. The carbon fiber/epoxy laminated composites were prepared by molding process. The wettability and interfacial properties between MWCNTs deposited carbon fibers (MWCNTs-T300) and EP were studied. The mechanical properties of carbon fiber/epoxy laminated composites were tested, and the mechanism of the interface strengthening was discussed. The results show that the surface energy of T300 carbon fiber is obviously increased after MWCNT deposition. The contact angle between MWCNTs-T300 and EP is reduced, and the interfacial energy and adhesion work are greatly improved. The MWCNTs-T300/EP laminated composites have excellent mechanical properties, the flexural strength is 822 MPa, the tensile strength is 841 MPa, and the interlaminar shear strength (ILSS) is 25.68 MPa, which are increased by 15.1%, 17.6% and 12.6% compared with those of the original carbon fiber/EP laminated composites (original T300/EP) respectively. The MWCNTs-T300/EP composites have good interface bonding performance, low porosity and uniform fiber distribution. Interfacial friction and resin toughening are the main mechanisms for the interface enhancement of MWCNTs-T300/EP composites.

为了提高碳纤维（CF）和环氧树脂（EP）的界面性能，T300碳纤维采用水悬浮沉积法涂覆了多壁碳纳米管（MWCNT）。碳纤维/环氧树脂层压复合材料是通过模塑工艺制备的。研究了MWCNTs沉积碳纤维（MWCNTs-T300）和EP之间的润湿性和界面性能。测试了碳纤维/环氧层压复合材料的力学性能，并讨论了界面强化的机理。结果表明，MWCNT沉积后，T300碳纤维的表面能明显增加。MWCNTs-T300与EP的接触角减小，界面能和粘合功大大提高。MWCNTs-T300 / EP层压复合材料具有出色的机械性能，弯曲强度为822 MPa，抗拉强度为841 MPa，层间剪切强度（ILSS）为25.68 MPa，与原始碳纤维/ EP层压复合材料相比，分别提高了15.1％，17.6％和12.6％ （原始T300 / EP）。MWCNTs-T300 / EP复合材料具有良好的界面粘合性能，低孔隙率和均匀的纤维分布。界面摩擦和树脂增韧是增强MWCNTs-T300 / EP复合材料界面的主要机理。MWCNTs-T300 / EP复合材料具有良好的界面粘合性能，低孔隙率和均匀的纤维分布。界面摩擦和树脂增韧是增强MWCNTs-T300 / EP复合材料界面的主要机理。MWCNTs-T300 / EP复合材料具有良好的界面粘合性能，低孔隙率和均匀的纤维分布。界面摩擦和树脂增韧是增强MWCNTs-T300 / EP复合材料界面的主要机理。