Dyeing Properties of Berberine on Cationic Dyeable Polyester

Abstract

<jats:p>The natural cationic colorant berberine was used to dye cationic dyeable polyester (CDP) fibers. Its dyeing properties, namely color strength (<jats:italic>K</jats:italic>/<jats:italic>S</jats:italic>) of dyed CDP and percent exhaustion (<jats:italic>E</jats:italic>%) of berberine, on CDP were explored at various dyeing pH levels, temperatures, time, and concentration of berberine. Furthermore, dyeing kinetic and thermodynamic studies were also carried out to evaluate the adsorption properties and mechanism. It was found that the<jats:italic>E</jats:italic>% of berberine on CDP fibers and the rate of adsorption increased with increasing dyeing temperature, while the influence of pH was extraordinarily small. In addition, the adsorption isotherm of berberine on CDP fibers was in line with the Langmuir model.</jats:p>

The application of biosurfactants for scouring wool

“…Saponins have been investigated for modern textile processing such as the desizing, scouring and bleaching of cotton . The use of biosurfactants such as saponins has the potential to improve the sustainability of raw wool scouring by reducing the environmental impact of surfactant production and treatment of wool‐scouring effluent, and also by preventing traces of synthetic surfactant remaining on the wool or entering the wool grease (a valuable coproduct of wool scouring that is processed into lanolin).…”