A feasible approach for enhancing union dyeing of wool/acrylic blend fabrics with heterobifunctional cationic reactive dyes

Abstract

In this work, a facile method to enhance union dyeing with cationic reactive dyes on wool/acrylic blend fabrics was reported. Three cationic reactive dyes containing various numbers of reactive groups were synthesized and employed on wool, acrylic and wool/acrylic blend fabrics using the one-bath one-step method. Factors affecting the dye exhaustion, union dyeing and leveling properties, including dyeing pH, temperature and dye structure, were investigated. Experimental results revealed that the cationic reactive dye containing heterobifunctional reactive groups and a cationic group attached on the backbone of structure exhibited better union dyeing properties, irrespective of dyeing method. The improvement in the union dyeing on wool and acrylic fabrics followed a decreasing order: Dye 1 > Dye 3 > Dye 2. In additional, the wool/acrylic blend fabrics dyed with Dye 1 showed outstanding leveling properties. The fastness properties of wool/acrylic fabrics for all cationic reactive dyes were good to excellent.

A Feasible Method Applied to One-Bath Process of Wool/Acrylic Blended Fabrics with Novel Heterocyclic Reactive Dyes and Application Properties of Dyed Textiles

“…The cationic quaternary ammonium salts including N-(2-aminoethyl) pyridinium chloride salt and maminophenyltrimethylammonium salt were synthesized according to the reported researches [16,[36][37][38]. The final products were synthesized by classical condensation and diazotization-coupling reaction according to the literature [12]. Methanol and dichloromethane (4:1 by volume) as the eluent system for chromatographic column was used to purified.…”

“…Polymers 2020, 12, x FOR PEER REVIEW 2 of 18 development of dyes applied for the one-bath processing of wool/acrylic fabrics will become an active research area in printing and dyeing as it reduces the effluent and improves the dyeing effectiveness. In our previous work, it has proven promising to use reactive dyes containing cationic groups for the one-bath dyeing of wool/acrylic blended fabrics [8][9][10][11][12]. The reactive group in the molecular structure of dye reacts with the wool fiber to form the covalent bond and the cationic group combines with acrylic fiber via the ionic bond, realizing the one-bath dyeing of wool/acrylic blended fabrics (shown in Figure 1) [13].…”