Method for preparing double-walled carbon nanotube fiber with high orientation degree, high density and high conductivity through dry-jet wet spinning

• Main Authors: WANG HAOZIKE, JIAO XINYU, HOU PENGXIANG, LIU CHANG, CHENG HUIMING
• Format: Patent
• Language: Chinese; English
• Published: 25.08.2023
• Subjects: APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS; NATURAL OR ARTIFICIAL THREADS OR FIBRES; SPINNING; TEXTILES

The invention relates to the field of preparation of high-performance carbon nanotube fibers, in particular to a method for preparing high-orientation-degree, high-density and high-conductivity double-walled carbon nanotube fibers through dry-jet wet spinning. The preparation method comprises the following steps: preparing a double-walled carbon nanotube liquid crystal spinning solution by taking a double-walled carbon nanotube with high quality and large length-diameter ratio as a raw material and adopting protonation technology in a low-loss dispersion manner; an air section is introduced in the process of preparing the carbon nanotube fiber through wet spinning, a double-walled carbon nanotube liquid crystal spinning solution is injected through an injector to pass through air with a certain length and then enters a coagulating bath, the height of the air section is regulated and controlled to regulate and control gravity to induce orientation and close arrangement of carbon nanotubes in the liquid crystal