Electrothermal properties of functionalization carbon nanotube composite films and films twisted yarns

Carbon nanotubes(CNT) have excellent electrical properties. In order to better applied it's performance to electrothermal fabric, the CNT films twisted yarn was prepared by twisting CNT film. The electrothermal properties of the yarn was further optimized by pre-spraying poly(3, 4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT:PSS)solution. The influence of the solution concentration on the structure and conductivity of CNT film and its films twisted yarns were studied, as well as the temperature changes of CNT film and its films twisted yarns under different applied voltage. As the PEDOT:PSS mass fraction increased from 0.01% to 1.4%, the conductivity of the sprayed CNT film gradually increased from 344.2 S/cm to 668.9 S/cm. When the electric voltage was applied across it, the spinning temperature of PC films twisted yarns can reach 214℃ with a response time of 5 s, which is 1.6 times of its untwisted films. That's indicates the good application potential and development value of the PEDOT:PSS/CNT film twisted yarn. © 2022, Periodical Agency of Journal of Textile Research. All right reserved.