Dyeing behavior and mechanism of Crocein Orange G on carboxymethyl cotton fabric

Traditional cotton fiber dyeing requires an abundance of salt, which leads to environmental pollution. Consequently, decreasing or eliminating the use of salt has become the primary focus of current research. In this study, Crocein Orange G was used to dye carboxymethyl cotton. Carboxymethyl cotton has better color shades than raw cotton and it is used along with a mordant in a simultaneous-mordant dyeing process, at a pH of 7, Al-2(SO4)(3)center dot 18H(2)O as the mordant. In addition, it was found that the adsorption kinetics of carboxymethyl cotton followed a pseudo-second-order kinetic model. The equilibrium adsorption capacity increased as the temperature increased from 30 to 50 degrees C, and the maximum equilibrium adsorption was 8.21 mg g(-1) at 50 degrees C. Furthermore, the adsorption isotherm data exhibited good agreement with the Freundlich isotherm. These results will help achieve salt-free dyeing of cotton fabric in the textile industry.

Automated summary

Traditional cotton fiber dyeing with an abundance of salt has led to environmental pollution, so research focus has shifted to decreasing or eliminating salt usage. The study successfully dyed carboxymethyl cotton with Crocein Orange G and a mordant, showing improved color shades compared to raw cotton. Adsorption kinetics of carboxymethyl cotton followed a pseudo-second-order kinetic model, with equilibrium adsorption capacity increasing at higher temperatures. These results have promising implications for achieving salt-free dyeing in the textile industry.