Method for preparing continuous and pure carbon nanotube fiber based on floating catalytic CVD (chemical vapor deposition) method

The invention discloses a method for preparing continuous and pure carbon nanotube fibers based on a floating catalytic CVD (chemical vapor deposition) method, which can effectively remove amorphous carbon and micron-sized impurity particles on the walls of carbon nanotubes in the fibers, the orientation degree of the carbon nanotubes is high, the fiber structure is compact, and the pure carbon nanotube fibers can realize thousands of meters of continuity and can be used for preparing the carbon nanotube fibers. Further, the obtained continuous and pure carbon nanotube fiber has higher tensile strength and conductivity. 本发明公开了一种基于浮动催化CVD法制备连续且纯净的碳纳米管纤维的方法，能有效地去除纤维内碳纳米管壁的无定形碳和微米级杂质颗粒，碳纳米管取向度高，纤维结构致密，且纯净碳纳米管纤维可实现数千米级连续，进而所得连续且纯净的碳纳米管纤维具有更高的拉伸强度和电导率。