Abstract:

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-methylmorphding-N-oxide(NMMO) based ultrafine CB. The color properties, anti-solvent migration, mechanical properties and crystalline properties of 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 reached its maximum, and no more increased 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 influence 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.

Key words: Lyocell fiber, colored cellulose membrane, dope dyeing, carbon black