Conductive composite fiber and preparation method thereof

[0026] First pretreat the polyurethane fiber in an aniline saturated aqueous solution for 5 minutes, take it out of the shade and dry it; then immerse it in a 1.1mg / ml graphene aqueous dispersion, and in an ice-water bath, ultrasonically assists the graphene to be adsorbed to the outer layer of the fiber, soaking The time is 1min, take it out and dry it; then soak the above fiber in the hydrochloric acid solution with a concentration of 3mol / ml for 30min, wash and dry, and prepare the conductive composite fiber (see figure 1 ), where graphene accounts for 0.5% by mass of the conductive fiber, and the conductivity of the conductive fiber is 6.9×10 1 Ω -1 cm -1 .

[0028] First pretreat the polyamide fibers in an aniline saturated aqueous solution for 12 minutes, and dry them in a cool place; then immerse them in a 40 mg / ml carbon nanotube aqueous dispersion, and ultrasonically assist the carbon nanotubes in the ice-water bath to adsorb the carbon nanotubes to the outer layer of the fibers. The soaking time is 35 minutes, take it out and dry it in the air; then soak the above fiber in the hydrochloric acid solution with a concentration of 2mol / ml for 20 minutes, wash and dry, and prepare the conductive composite fiber (see figure 2 ), where carbon nanotubes account for 9% by mass of the conductive fiber, and the conductivity of the conductive fiber is 1.2×10 2 Ω -1 cm -1 .

[0030] First pretreat the polyamide fibers in a saturated pyrrole aqueous solution for 15 minutes, and then dry them in a cool place; then immerse them in a 5 mg / ml graphite oxide aqueous dispersion, and ultrasonically assist in the adsorption of graphite oxide to the outer layer of the fibers in an ice-water bath. Take out and dry for 25 minutes; then soak the above-mentioned fibers in a hydrochloric acid solution with a concentration of 1mol / ml for 60 minutes, wash and dry to prepare a conductive composite fiber, wherein the mass percentage of graphite oxide in the conductive fiber is 6 %, the conductivity of the conductive fiber is 3.6×10 -4 Ω -1 cm -1 .