Effects of alkanolamine solvents on the aggregation states of reactive dyes in concentrated solutions and the properties of the solutions

Abstract

The solvent, DEA, reduces the dye aggregation that may be caused by the weak hydrogen bonding and relatively smaller steric hindrance effect.

Highly crystalline and robust covalent organic framework membranes for predictable solvent transport and molecular separation

“…[42][43][44] To eliminate the effect of electrostatic interaction, ethanol was selected as a typical organic solvent to dissolve the charged dyes, because they are difficult to dissociate and form aggregates in ethanol. 45 The rejection rates toward various dyes were obtained based on UV-vis absorption spectra (Fig. S20 †).…”

Insights into coloration enhancement of mercerized cotton fabric on reactive dye digital inkjet printing

“…The EG concentration was 20% by weight. The certain amount of reactive dye was added to a EGwater solution at 25 C. [26][27][28][29][30][31] The concentration of reactive dye in all solutions was 50 mmol L À1 . In the process of inkjet printing, viscosity (Fig.…”

Investigation on dyeing mechanism of modified cotton fiber

“…They are some of the most widely used dyes in cotton fabric dyeing. [4][5][6][7][8][9] Recently, a large amount of inorganic salts were added to the dyeing process to eliminate electrostatic repulsion and made the dye molecules come into close contact with the fabrics' surface. 10,11 However, aer dyeing, inorganic salts still existed in dyeing wastewater, which increased the difficulty of treatment and dyeing cost.…”