炭黑/Lyocell纤维素膜的制备及其性能

为解决水性颜料色浆对Lyocell纤维纺丝液造成的凝固问题，利用N-甲基吗啉-N-氧化物（NMMO）基超细炭黑，采用原液着色技术制备了炭黑/Lyocell纤维素膜，探讨了炭黑/Lyocell纤维素膜的颜色性能、耐溶剂迁移性能、力学性能和结晶性能。结果表明，当炭黑含量为纤维素质量分数的3 %时，着色纤维素膜的颜色深度达到饱和，不再随炭黑含量的增加而升高，且炭黑质量分数低于3 %时，着色纤维素膜的摩擦和水洗牢度较高，耐水、丙酮和乙醇迁移性能良好。通过扫描电镜观察发现，炭黑在极性较高的水中更容易发生迁移。炭黑对纤维素膜的断裂强力和断裂伸长率有影响，但不会改变纤维素膜的晶体结构，研究结果对实现Lyocell纤维原液着色具有重要的参考作用。

Preparation and properties of carbon black/Lyocell cellulose membrane

To solve the solidification problem of Lyocell fiber spinning solution caused by water-based pigment,the carbon black (CB)/Lyocell cellulose membrane was prepared by dope dyeing using N-methylmorphdine-N-oxide(NMMO) based uhrafine CB.The color properties,anti-solvent migration,mechanical properties and crystalline properties of the CB/Lyocell cellulose membrane were discussed.The results showed that when the content of CB is 3％,the color depth of CB/Lyocell cellulose membrane reaches its maximum,and no more increase with CB.When the content of CB is less than 3％,the CB/ Lyocell cellulose membrane has good rubbing and washing fastness,and the solvent migration resistance is also good.By scanning electron microscopy it is deduced that CB is more likely to migrate in water with higher polarity.The CB influences the mechanical properties of the CB/Lyocell membrane,but can not change the crystal structure of the cellulose membrane.This study plays an important reference for achieving dope dyeing of Lyocell fibers.