N-甲基吗啉-N-氧化物基超细炭黑的制备

为解决水性颜料色浆对Lyocell纤维纺丝液造成的凝固问题，制备了NMMO基超细炭黑色浆，利用其对Lyocell纤维进行原液着色。针对Lyocell纤维原液着色用超细炭黑的制备展开研究，探讨了分散剂的结构及用量，炭黑质量分数，水和NMMO组成混合溶剂中水的质量分数，超声波处理功率及时间对NMMO基超细炭黑的粒径、粒度分布及分散稳定性的影响。结果表明，以实验室自制的分散剂SP制备的NMMO基超细炭黑具有最小的粒径及优良的分散稳定性，与纺丝液相容性最好。通过正交试验优化得到NMMO基超细炭黑的制备工艺：分散剂对炭黑的质量分数2为20 %，炭黑对体系的质量分数为10 %，超声波处理时间为20 min，功率为800 W。

Preparation of 4-Methylmopholine N-oxide based ultrafine carbon black

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. Theinfluences of different dispersant structures and their amount, ultrasonic power and time, the mass fraction of water in the dispersion media and the mass fraction ofCB 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 wereSPof 20 % (by weight of CB content) andCBof 10 % (by weight of entirety), with the ultrasonic power 800 W for 20 min.