【摘要】 用化学气相沉积法在高强度碳纤维表面生长碳纳米管(CNTs)多尺度增强体,研究了加载金属催化剂成分对CNTs生长前后碳纤维强度的影响。结果表明:在500℃金属催化剂成分对还原后催化剂颗粒的形貌和碳纤维的强度影响不大,但是对CNTs的生长速度和碳纤维表面生长CNTs多尺度增强体的强度有显著的影响。高催化效率不仅有利于碳纤维表面CNTs的高效合成,还促进碳纤维表面损伤的修复。Fe-Cu和Ni-Cu催化体系具有较高的催化效率,碳纤维表面催化生长CNTs后其拉伸强度分别提高了12.26%和12.80%。更多还原

【Abstract】 Carbon nanotubes(CNTs)-grafted carbon fibers, which can significantly improve the tensile strength of carbon fibers, were successfully prepared via chemical vapor deposition(CVD) process. It was found that the metal catalyst composition had a little influence on the morphology of catalyst particles and tensile strength of carbon fibers after the reduction of catalyst precursor, but significantly affected the growth rate of CNTs and the corresponding tensile strength of CNT-grafted carbon fibers. High catalyst activity not only contributes to the high-efficiency for the synthesis of CNTs, but also facilitate the healing of damages on surface and strengthening of carbon fibers. Fe-Cu and Ni-Cu catalysts were found to be high efficient catalyst for CNTs growth. Therewith, the tensile strength of the CNTs grafted carbon fiber prepared in the presence of catalysts of Fe-Cu and Ni-Cu increased by 12.26% and 12.80% respectively.更多还原