Abstract:

To solve the solidification problem of lyocell fiber spinning solution caused by water-based pigment, highly stable 4-Methylmopholine N-oxide (NMMO) based ultrafine nano carbon black (CB) pigment was prepared for spun-dyeing lyocell fibers by investigating various influence factors. The influences of different dispersant structures and their amount, ultrasonic power and time, the mass fraction of water in the dispersion media and the mass fraction of CB on the particle size, distribution and stability of NMMO based ultrafine CB dispersion were studied. The results showed that the prepared NMMO based ultrafine CB with dispersant SP has the smallest particle size and excellent dispersion stability. It was also observed that the NMMO based ultrafine CB was highly compatible with the spinning solution. The optimum condition for preparing the nano CB pigment using orthogonal experimental model were SP of 20 % (by weight of CB content) and CB of 10 % (by weight of entirety), with the ultrasonic power 800 W for 20 min.

Key words: no dyed colorful fiber, 4-Methylmopholine N-oxide (NMMO) based ultrafine carbon black, spun-dye, lyocell fiber