Synthesis of a Bi-functional Cationic Agent and its Application in Cotton Dyeing

Abstract

A bi-functional cationic agent was synthesized and was applied for cationization of cotton fabric. Pad-batch and exhaustion application processes were compared and dyeing levelness, adsorption isotherm, and e ect of Na 2 CO 3 on fastness were discussed. Results showed that the bi-functional cationic agent treated fabrics showed similar dye-uptake and slightly higher fastness than fabrics treated with a commercial mono-reactive cationic agent when applied by a pad-batch process, but displayed a higher color yield when the two agents were applied in an exhaust application.

Quantitative analysis of trimethyl amine in cotton fabrics cationized with 3-chloro-2-hydroxypropyltrimethylammonium chloride

“…An extensive study of the reaction kinetics of CHPTAC with cotton found that in general, reaction efficiency could not be meaningfully improved from currently obtained levels (De Vries et al 2014). A synthesized bifunctional bis-CHPTAC molecule with a goal of improving the efficiency of the exhaustion and cold pad batch cationization process, found similar results when compared to CHPTAC (Yuan and Hauser 2014). Further, with concerns over the safety of CHPTAC, cost of cationization, lack of demonstration of large scale results, and lack of methodology to transition from a traditional reactive dyeing of cotton to a cationic cotton dyeing and process, cationic cotton has still not seen a large industrial recognition aside from niche markets.…”