Abstract:

On account of the dissol ution loss of colorant in natural dyes coloring alginate fiber during wet spinning, copper chlorophyll (CHl-Cu) was used as colorant and sodium alginate dilute solution was used as organic grind auxiliary agent dispersant, dope dyeing spinning solution and alginate fiber were prepared. Properties of coloring spinning solution was characterized by infrared spectroscope, rotary rheometer and transmission electron microscope. The morphology of dyed alginate fiber was observed by scanning electron microscope, and water resistante migration and flame-retardany of fibers were tested. The results show stability of dyed spinning solution is the best when the Chl-Cu content is under 6%, and the Chl-Cu can be distributed evenly with a diameter imaller than 20 nm. The agglomeration of Chl-Cu nano particles are successfully eliminated, on account of Cu2+ cross-linking structure between Chl-Cu nano-particles and SA, Chl-Cu can be ground successful and dispersed stably. Chl-Cu colorant has good water resistant migration, and does not change the fiber surface. The dote-dyed alginate fiber has a prefect flame retardancy, and the limiting oxygen index is above 39%.

Key words: natural pigment, copper chlorophyll, dope dyeing, alginate fiber, spinning solution, nano particle