Performance improvement of continuous carbon nanotube fibers by acid treatment

Zhang Qiang^{1, 3}, Li Kewei¹, Fan Qingxia^{1, 3}, Xia Xiaogang^{1, 3}, Zhang Nan¹, Xiao Zhuojian^{1, 3}, Zhou Wenbin¹, Yang Feng^{1, 3}, Wang Yanchun^{1, 2, 3}, Liu Huaping^{1, 2, 3}, Zhou Weiya^{1, 2, 3, †}

(color online) Continuous fabrication of a CNT fiber. (a) Schematic diagram of the equipment and synthetic process of a continuous CNT fiber. (b) A photograph of a continuous CNT fiber fabricated through in situ shrinking a CNT film with water. (c) A CNT fiber of ∼ 100 m in length collected on a PTFE winder.