Abstract:

In order to development environment-friendly retarding agent for acrylic fiber dyeing, three imidazolium-based ionic liquids (n-14) were used as retarding agent for methylene blue dyeing of acrylic fabrics. And the dyeing performance of n-14 was compared with conventional retarding agent cetyltrimethylammonium bromide (CTAB). The retarding dyeing laws of n-14 were explored by dosage of retarding agent, dyeing temperature and dyeing rate curves. It was found that the retarding dyeing performance of n-14 was increased with the increasing of alkyl carbon chain n. The addition of n-14 were decreased the final dyeing uptake of acrylic fabrics, but the same effect obtained by CTAB. Imidazolium-based ionic liquids n-14 can be as a excellent retarding agent for dyeing of acrylic fabrics.

Key words: acrylic fabric, ionic liquid, retarding agent, dyeing, cationic dye