中国物理B ›› 2017, Vol. 26 ›› Issue (2): 28802-028802.doi: 10.1088/1674-1056/26/2/028802

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Performance improvement of continuous carbon nanotube fibers by acid treatment

Qiang Zhang(张强), Kewei Li(李克伟), Qingxia Fan(范庆霞), Xiaogang Xia(夏晓刚), Nan Zhang(张楠), Zhuojian Xiao(肖卓建), Wenbin Zhou(周文斌), Feng Yang(杨丰), Yanchun Wang(王艳春), Huaping Liu(刘华平), Weiya Zhou(周维亚)   

  1. 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 Beijing Key Laboratory for Advanced Functional Materials and Structure Research, Beijing 100190, China;
    3 University of Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2016-11-08 修回日期:2016-11-16 出版日期:2017-02-05 发布日期:2017-02-05
  • 通讯作者: Weiya Zhou E-mail:wyzhou@iphy.ac.cn
  • 基金资助:

    Project supported by the National Basic Research Program of China (Grant No. 2012CB932302), the National Natural Science Foundation of China (Grant Nos. 11634014, 51172271, 51372269, and 51472264), and the "Strategic Priority Research Program" of the Chinese Academy of Sciences (Grant No. XDA09040202).

Performance improvement of continuous carbon nanotube fibers by acid treatment

Qiang Zhang(张强)1,3, Kewei Li(李克伟)1, Qingxia Fan(范庆霞)1,3, Xiaogang Xia(夏晓刚)1,3, Nan Zhang(张楠)1, Zhuojian Xiao(肖卓建)1,3, Wenbin Zhou(周文斌)1, Feng Yang(杨丰)1,3, Yanchun Wang(王艳春)1,2,3, Huaping Liu(刘华平)1,2,3, Weiya Zhou(周维亚)1,2,3   

  1. 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 Beijing Key Laboratory for Advanced Functional Materials and Structure Research, Beijing 100190, China;
    3 University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2016-11-08 Revised:2016-11-16 Online:2017-02-05 Published:2017-02-05
  • Contact: Weiya Zhou E-mail:wyzhou@iphy.ac.cn
  • Supported by:

    Project supported by the National Basic Research Program of China (Grant No. 2012CB932302), the National Natural Science Foundation of China (Grant Nos. 11634014, 51172271, 51372269, and 51472264), and the "Strategic Priority Research Program" of the Chinese Academy of Sciences (Grant No. XDA09040202).

摘要:

Continuous CNT fibers have been directly fabricated in a speed of 50 m/h-400 m/h, based on an improved chemical vapor deposition method. As-prepared fibers are further post-treated by acid. According to the SEM images and Raman spectra, the acid treatment results in the compaction and surface modification of the CNTs in fibers, which are beneficial for the electron and load transfer. Compared to the HNO3 treatment, HClSO3 or H2SO4 treatment is more effective for the improvement of the fibers' properties. After HClSO3 treatment for 2 h, the fibers' strength and electrical conductivity reach up to ~2 GPa and ~4.3 MS/m, which are promoted by ~200% and almost one order of magnitude than those without acid treatment, respectively. The load-bearing status of the CNT fibers are analyzed based on the downshifts of the G' band and the strain transfer factor of the fibers under tension. The results reveal that acid treatment could greatly enhance the load transfer and inter-bundle strength. With the HClSO3 treatment, the strain transfer factor is enhanced from ~3.9% to ~53.6%.

关键词: carbon nanotube fiber, electrical conductivity, mechanical property, performance improvement

Abstract:

Continuous CNT fibers have been directly fabricated in a speed of 50 m/h-400 m/h, based on an improved chemical vapor deposition method. As-prepared fibers are further post-treated by acid. According to the SEM images and Raman spectra, the acid treatment results in the compaction and surface modification of the CNTs in fibers, which are beneficial for the electron and load transfer. Compared to the HNO3 treatment, HClSO3 or H2SO4 treatment is more effective for the improvement of the fibers' properties. After HClSO3 treatment for 2 h, the fibers' strength and electrical conductivity reach up to ~2 GPa and ~4.3 MS/m, which are promoted by ~200% and almost one order of magnitude than those without acid treatment, respectively. The load-bearing status of the CNT fibers are analyzed based on the downshifts of the G' band and the strain transfer factor of the fibers under tension. The results reveal that acid treatment could greatly enhance the load transfer and inter-bundle strength. With the HClSO3 treatment, the strain transfer factor is enhanced from ~3.9% to ~53.6%.

Key words: carbon nanotube fiber, electrical conductivity, mechanical property, performance improvement

中图分类号:  (Carbon nanotubes)

  • 88.30.rh
81.07.-b (Nanoscale materials and structures: fabrication and characterization) 78.30.-j (Infrared and Raman spectra) 61.48.De (Structure of carbon nanotubes, boron nanotubes, and other related systems)