Preparation and properties of nanoscale carbon black for dope dyeing of polyacrylonitrile fibers

Nanoscale carbon black is one of the important colorants for the dope dyeing of polyacrylonitrile( PAN) fibers. This paper prepared the nanoscale carbon black with acrylate block copolymer( SUA020) as the dispersant and dimethylformamide( DMF) as dispersing media by ultrasonic technology. The effect of nanoscale carbon black on the dope properties PAN fibers was investigated. The results showed that the nanoscale carbon black with particle size 108. 7 nm could be prepared when the mass fraction of carbon black was 10%,SUA 020 to carbon black 20%( mass fraction),ultrasonic power 600 W and ultrasonic treating time 20 min. The nanoscale carbon black has excellent compatibility and stability with the dope of PAN fibers. The K / S value of the membrane prepared form PAN fiber dope and nanoscale carbon black reached the maximum when the amount of nanoscale carbon black weight was 9%.