Preparation of CNTs rope by electrostatic and airflow field carding with high speed rotor spinning

4th Global Conference on Materials Science and Engineering

Dai, J.F.^1,2 ; Liu, J.F.^1 ; Zou, J.T.^1 ; Dai, Y.L.^1

School of Science, Lanzhou University of Technology, Lanzhou

730050, China^1

State Key Laboratory of Advanced Processing and Recycling of Non-ferrous, Lanzhou

730050, China^2

关键词: Air flow fields;    Applied voltages;    Electrostatic spinning;    High-speed rotors;    Internal diameters;    Large scale preparation;    Rotor spinning;    Uniform diameter;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/103/1/012016/pdf
DOI  :  10.1088/1757-899X/103/1/012016

来源: IOP

【 摘 要 】

The large-scale preparation of disorderly CNTs with a length larger than 3 mm using CVD method were aligned in polymer monomer airflow fields in a quartz tube with an internal diameter of 200 μm and a length of 1.5 m. The airflow aligned CNTs at the output end of the pipe connects to a copper nozzle with an electrostatic field of applied voltage 5×105V/m and space length of 0.03 m, which were further realigned using via electrostatic spinning. End to end spray into the high speed rotor twisted single-stranded carbon nanotubes threads via rotor spinning technology. The essential component of this technique was the use of carbon nanotubes at a high rotory speed (200000 r/min) combined with the double twisting of filaments that were twisted together to increase the radial friction of the entire section. SEM micrography showed that carbon nanotube thread has a uniform diameter of approximately 200 μm. Its tensile strength was tested up to 2.7 Gpa, with a length of several meters.