Preparation Of D5 Reverse Micelle Systems And Their Application In Dyeing With Reactive Dyes

Presently, the reverse micelle technology as an emerging technology at home and abroad showed its good feasibility and superiority in protein extraction separation, enzyme immobilization, as well as preparation of nano-particles, and demonstrated enormous development potential and application value in the fields of bio-engineering, medicine, food science and so on. In addition, in recent years, the micro emulsion technique which based on the reverse micelle technique, combined with other technologies shows great application potential in micro emulsion fuel, micro emulsion washing, paints, cosmetics, fabric dyeing and finishing, leather processing and protecting and many other areas.In this paper, the novel D5 reverse micelle systems had been successfully prepared by substituting the eco-friendly D5(Decamethyl Cyclopentasiloxane) for the alkanes of traditional reverse micelle systems as continuous phase medium, the water solubilization behaviors of the systems had been investigated by comparing with the water solubilization amount of D5 reverse micelle systems prepared with anionic surfactants, cationic surfactants and non-ionic surfactants respectively, the influence of the neutral electrolyte, temperature, pH, aging time on the stability and the saturated solubilization amount of D5 reverse micelle systems, and the influence of the water content of the TX-10/ octanol/ D5 system on the conductivity and the particle size had been also stieded. The results showed that it's feasible to prepare the environment-friendly reverse mecelles by using the non-polar D5 to substitute for the alkanes of the traditional reverse micelle system; both the usage of cosurfactant alcohol and concentration of surfactant affect water solubilization of the system; the water solubilization ability of TX-10/octanol/D5 and 1831/octanol/D5 reverse micelle systems sharply decline when adding neutral electrolyte. The saturated water solubilization of TX-10 / octanol / D5 reverse micelles is basically unaffected to the pH values of solubilizing aqueous phase. When the solubilizing water phase is acidic, the saturated water solubilization of 1831/octanol/D5 reverse micelle remains stable, but when the solubilizing water phase is alkaline, the saturated water solubilization decreases with the increase of the pH values. The aging time does not affect the water solubilization of TX-10/octanol/D5 reverse micelles. The particle size and viscosity of TX-10/octanol/D5 reverse micelles increase with the augmentation of water content and the particle size distributions broaden at the same time. The system conductivity emerges a mutation point with the increase of W0, which proves the appearing of free solubilization water in the reverse micelles.The dyeing of cotton fiber with reactive dyes in D5 reverse micelle system was studied systematically. Thereby, the MOA-3/octanol/D5 reverse micelle system that is suitable for reactive dyeing was selected and optimized, process for cotton reactive dyeing in D5 reverse micelle systems and test method for reverse micelles residue absorbance were established and the influences of the neutral electrolyte, reverse micelles water conten, liquid pick up rate of fabric on the D5 reverse micelle reactive dyeing properties were investigated, The results showed that the method for reactive dyeing of cotton fabric in D5 reverse micelle system is feasible, in which the fabric was pretreated with alkali solution and squeezed to a certain liquid pick up rate before immerged into dye bath, the alkali solution contained 40g/L of Na₂CO₃, the dyeing temperature was 60℃and process duration 30min. Neutral electrolyte Na2SO4 had no significant dyeing promoting effect for MOA-3/octanol/D5 dyeing of reactive dyes. Study also found that the liquid pick-up of pretreated fabric with alkali solution showed significant impact on the dye exhaustion rate, i.e. the lower the pick–up, the higher the rate of dye exhaustion, but between exhaustion rate and K / S value of dyed fabric after fixing, there is no positive correlation, the reason remains to be further studied; D5 reverse micelles of the dye will not affect the shade of dyed fabric, it can be the potential alternative of water as novel dyeing medium.