易碱洗型分散染料合成及其对二醋酯纤维织物的染色性能评估

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中图分类号：TS190.2 文献标志码：A 文章编号：1673-3851（2025）07-0515-08

Abstract： To develop disperse dyes with high color fastness， excellnt dyeing properties，and the ability to replace reduction washing with alkaline washing，a novel carboxylate-and phthalimide-containing disperse dye Cl with easy alkali washability was synthesized by introducing carboxylate ester and phthalimide groups into the dye molecular structure through N-alkylation and diazo-coupling reactions. The dye's molecular structure was confirmed using UV-Vis spectroscopy， infrared spectroscopy， mass spectrometry，and nuclear magnetic resonance hydrogen spectroscopy. The dyeing performance of Cl on diacetate fiber fabrics was comprehensively evaluated based on strike up，dyeing rate，and color fastness. When the dye concentration was 2.0% （owf），the dye adsorption sites on the fiber surface were nearly saturated. Cl showed outstanding dyeing performance on diacetate fiber fabrics，with a K/S value over 19. 00 and a dyeing rate of 92.3% . The diacetate fiber fabrics exhibited high L∗ ， b* ，and c* values，and appeared orange with a maximum absorption wavelength at 480nm . After reduction and alkaline washing， thefabric's color fastness remained at level 4or above.Results showed that the color fastness of C1-dyed fabrics after alkaline washing was comparable to that after reduction washing. This process eliminates the use of insurance powder and reduces environmental pollution，ofering an eficient and eco-friendly method for post-dyeing treatment of diacetate fiber fabrics.

Key words： carboxylate; phthalimide;cellulose diacetate; disperse dyes;color fastness

0 引言

二醋酯纤维（Cellulosediacetate，CA）集吸湿透气性、珍珠光泽、尺寸稳定性等方面的优势于一体，其低玻璃化转变温度与结晶度特性可促进染色过程中分子链运动，从而为分散染料吸附扩散创造有利条件。（剩余9089字）