School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive NW, Atlanta, Georgia 30332, USA.
ACS Nano. 2010 Mar 23;4(3):1716-22. doi: 10.1021/nn901621c.
An ultrafast microwave annealing process has been developed to reduce the defect density in vertically aligned carbon nanotubes (CNTs). Raman and thermogravimetric analyses have shown a distinct defect reduction in the CNTs annealed in microwave for 3 min. Fibers spun from the as-annealed CNTs, in comparison with those from the pristine CNTs, show increases of approximately 35% and approximately 65%, respectively, in tensile strength ( approximately 0.8 GPa) and modulus (approximately 90 GPa) during tensile testing; an approximately 20% improvement in electrical conductivity (approximately 80000 S m(-1)) was also reported. The mechanism of the microwave response of CNTs was discussed.
已经开发出一种超快微波退火工艺，以降低垂直排列的碳纳米管（CNT）中的缺陷密度。拉曼和热重分析表明，在微波中退火 3 分钟的 CNT 中存在明显的缺陷减少。与原始 CNT 相比，从退火 CNT 纺制的纤维在拉伸测试中分别表现出大约 35%和大约 65%的拉伸强度（约 0.8 GPa）和模量（约 90 GPa）的增加；还报道了大约 20%的电导率（约 80000 S m(-1)) 的提高。讨论了 CNT 对微波响应的机制。
