Abstract In this paper, vertically aligned carbon nanotube/carbon fiber (VACNT/CF) hybrids was prepared by electrophoretic deposition (EPD) under mild conditions. The coaxial cylindrical electrode with CF filament as the cathode was employed to ensure dense VACNT arrays deposited on CF surface at low deposition voltage. The effect factors on the carbon nanoparticles alignment were investigated by the micro-morphology observations of hybrid fibers, including the diameter of carbon nanoparticles, types of solvent, deposition voltages, deposition time and the concentrations of carbon nanoparticles in dispersion. The results indicate that the optimum electrophoretic deposition conditions for vertically aligned hybrid fibers is the diameter of carbon nanoscale reinforcements of 110–170 mm, acetonitrile (ACN) as the dispersion medium, deposition voltage of 30 V, deposition time of 20 s and dispersion concentration of the carbon nanoparticles of 0.01 mg/mL. Single fiber tensile testing was performed and manifested that EPD in a coaxially cylindrical electric field was not destructive and could preserve the mechanical properties of CF filaments. Results of interphase properties tests demonstrated that the contact angle and the interfacial shear strength (IFSS) were significantly improved by 48.3% and 58.1% compared to that of as-recieved CF, respectively. The interfacial enhancement mechanism was also explored in details.

中文翻译：

---

通过电泳沉积在碳纤维上垂直排列的碳纳米管对杂化复合材料的界面增强

摘要 在本文中，通过电泳沉积（EPD）在温和条件下制备了垂直排列的碳纳米管/碳纤维（VACNT/CF）杂化物。使用以 CF 灯丝作为阴极的同轴圆柱电极以确保在低沉积电压下在 CF 表面沉积致密的 VACNT 阵列。通过混合纤维的微观形貌观察，研究了影响碳纳米颗粒排列的因素，包括碳纳米颗粒的直径、溶剂类型、沉积电压、沉积时间和分散体中碳纳米颗粒的浓度。结果表明，垂直排列的混合纤维的最佳电泳沉积条件是碳纳米级增强体的直径为 110-170 mm，乙腈 (ACN) 作为分散介质，沉积电压为 30 V，沉积时间为 20 秒，碳纳米颗粒的分散浓度为 0.01 mg/mL。进行了单纤维拉伸测试，结果表明在同轴圆柱电场中 EPD 没有破坏性，并且可以保持 CF 长丝的机械性能。界面特性测试结果表明，与收到的 CF 相比，接触角和界面剪切强度 (IFSS) 分别显着提高了 48.3% 和 58.1%。还详细探讨了界面增强机制。进行了单纤维拉伸测试，结果表明在同轴圆柱电场中 EPD 没有破坏性，并且可以保持 CF 长丝的机械性能。界面特性测试结果表明，与收到的 CF 相比，接触角和界面剪切强度 (IFSS) 分别显着提高了 48.3% 和 58.1%。还详细探讨了界面增强机制。进行了单纤维拉伸测试，结果表明在同轴圆柱电场中 EPD 没有破坏性，并且可以保持 CF 长丝的机械性能。界面特性测试结果表明，与收到的 CF 相比，接触角和界面剪切强度 (IFSS) 分别显着提高了 48.3% 和 58.1%。还详细探讨了界面增强机制。