Carbon nanotube grafted carbon fibers (CNT-g-CFs) were prepared continuously, spool to spool, via thermal CVD. The application of an in-situ potential difference (300 V), between the fibers and a cylindrical graphite foil counter electrode, enhanced the growth, producing a uniform coverage of carbon nanotubes with diameter ca. 10 nm and length ca. 125 nm. Single fiber tensile tests show that this approach avoids the significant reduction of the underlying carbon fiber strengths, which is usually associated with CVD grafting processes. Single fiber fragmentation tests in epoxy, with in-situ video fragment detection, demonstrated that the CNT-g-CFs have the highest interfacial shear strength reported for such systems (101 ± 5 MPa), comparable to state-of-the-art sizing controls (103 ± 8 MPa). Single fiber pull-out data show similar trends. The short length of the grafted CNTs is particularly attractive for retaining the volume fraction of the primary fibers in composite applications. The results are compared with a short review of the interfacial data available for related systems.

连续地通过热CVD连续地制备碳纳米管接枝的碳纤维（CNT-g-CFs）。在纤维和圆柱形石墨箔对电极之间施加原位电势差（300 V），可以促进生长，并产生直径约ca的碳纳米管均匀覆盖。10 nm和长度约。125 nm。单纤维拉伸试验表明，这种方法避免了碳纤维强度的显着降低，而碳纤维强度通常与CVD接枝工艺有关。环氧树脂单纤维断裂测试，现场进行视频片段检测表明，对于此类系统，CNT-g-CF具有最高的界面剪切强度（101±5 MPa），可与最新的施胶对照（103±8 MPa）相提并论。单纤拔出数据显示出相似的趋势。接枝CNT的短长度对于在复合应用中保持初级纤维的体积分数特别有吸引力。将结果与相关系统可用界面数据的简短回顾进行比较。