原液着色Lyocell纤维制备过程中炭黑与溶剂的相互作用

着色剂的加入是否会影响Lyocell绿色生产工艺和溶剂的回收利用是原液着色Lyocell纤维实际生产面临的问题。选用炭黑作为黑色颜料,研究了炭黑在NMMO溶液中的分散性,分析了不同炭黑添加量的溶液特性、纤维的可纺性和纺丝条件,用X射线衍射法分析了纤维的基本结构和性能的关系。着重采用红外光谱、紫外光谱分析了炭黑对溶剂NMMO的影响,用紫外光谱研究了炭黑在纺丝成形和纤维使用过程中的迁移量。结果表明:整个纺丝成形过程中炭黑没有发生迁移,炭黑的添加不影响溶剂的回收利用;制得的原液着色Lyocell纤维色牢度高;随着炭黑添加量的增大,纤维结晶度会有所降低,纤维强度略有下降,但依然满足服用要求。

Interaction Between Carbon Black and NMMO in the Preparation of Dope Dyed Lyocell Fibers

The problem in dope dyeing process of Lyocell is whether the additives such as carbon black, af-fects the recovery of Lyocell solvent NMMO or not. The spinning process with the change of the fillingamount of the carbon black was analyzed. The relationship between structure and properties were analyzedby X-ray diffraction method. Infrared spectrum and UV spectrum were used to analyze the influence of car-bon black filling agent on NMMO, and also the migration quantity of carbon black in spinning process wasstudied. The results show that carbon black does not migrate during the spinning process, and the additionof carbon black does not affect the recovery of solvent. The dope dyed Lyocell has a high color fastness, butthe crstallinity of the fiber and the fiber strength will decrease slightly with the increase of the carbonblack, which can still meet the requirement of taking.