Adsorption of Reactive Red 120 in Decamethyl-Cyclopentasiloxane Non-Aqueous Dyeing System

Traditional dyeing usually consumes a significant amount of water and salts, thus causing environmental pollution. Salt-free low-water has become an important research direction in the cotton fabric industry. The non-aqueous media technology, using decamethylcyclopentasiloxane (D5) as medium, achieved energy saving emission reduction this To investigate influence inorganic salts on properties reactive dyes medium system, adsorption kinetics level property C.I. Reactive Red 120 were investigated at various concentrations sodium sulfate. When no included siloxane 80% dye could diffuse onto surface after 10 min. However, if 13% added during dyeing, 87% to over same time. Moreover, rate was increased from 3.85 mg/g·min 5.04 when quantity 0% 13%. concentration sulfate had minimal effect color depth dyed final uptake dye. But, significant, became poor Sγ(λ) value 0.020 0.042. kinetic D5 solution may be best described by pseudo-second-order model. As increases, half-dyeing time gradually decreases increases. repulsive force between fiber lowered addition Consequently, affected rate. Therefore, formula that do not contain can applied successfully systems.