Effect of thermal treatments on structures and mechanical properties of aerogel-spun carbon nanotube fibers

Li Wei Xu Fujun Wang Zhiyong Wu Jianhua Liu Wei Qiu Yiping · 2016

阅读量：255

碳纳米管

期刊名称：

Materials Letters 2016 年 183 卷

发表日期：

2016.11.15

摘要：

In this study, the structural changes, mechanical and electrical properties of carbon nanotube (CNT) fibers after thermal treatments in air with different cooling conditions have been investigated. The tensile strength of the CNT fibers improves about 50% after heat treatment at 250???°C, due to the increase in crystallinity and oxygen-containing groups. After the thermal treatment followed by air cooling, the CNT fiber shows a 217% increases in its tensile modulus and the tensile failure model changes from ductile behavior to brittle fracture. In addition, Raman spectroscopy, Fourier transform infrared spectroscopy, transmission electron microscopy and field emission scanning electron microscopy are conducted to observe the structural changes of CNT fibers before and after thermal treatments.