Study On The Interaction Between A Cationic Gemini Surfactent And Anonic Dyes

The interactiones and mechanism between a cationic Gemini surfactant T122 and a series of anionic dyes were investigated in order to provide theoretical and scientific support for new surfactant'application in textile industries.Interactiones between the cationic Gemini surfactant T122 and dyes were studied by the methods of Surface Tension Measurement and Stable Fluorescence Spectrum. The change of surfactant'Critical Micelle Concentration (cmc) and Critical Micelle Aggregation Numbers (Nm) was reseached due to the interaction with dyes. The Gemini surfactant T122's cmc increases from 1.02×10-5 mol·L^-1 to 7.38×10-5 mol·L^-1 as a result of interaction with dye KE-R by the method of the cmc of Gemini surfactant T122 after reacting with MO/KE-R/KE-4R Surface Tension Measurement .The result was compared with the traditional surfactant CTAB which cmc increases from 6.77×10-4 mol·L^-1 to 1.61×10-3 mol·L^-1 due to the interaction with dye KE-R. The Nm of Gemini surfactant T122 increases from 58 to 64 while the Nm of CTAB from 43 to 49 due to the interaction with MO by the method of Stable Fluorescence Spectrum.The UV-dis transformation of dyes MO and KE-R owing to interaction with surfactant T122 and CTAB was investigated. The UV-dis differences was analyzed due to interactio with surfactant T122 and CTAB respectively. The cmc of the Gemini surfactant T122 increases from 1.02×10-5 mol·L^-1 to 8.4×10-5 mol·L^-1 measured according to the curve ofλmax of dyes and concentrationes of the surfactant T122 as a result of interaction with MO while the cmc of CTAB from 6.77×10-4 mol·L^-1 to 9.7×10-5 mol·L^-1. The experimental results is similar with the above methods of Surface Tension and Stable Fluorescence Spectrum.