The Interactions Between Bromophenol Blue And CTAB,OP-10 In Aquous Solution,alcohol-water Solution,Microemulsion

The interaction between dye and surfantant,as an efficient way to enhance the dyeing property and treat the dyestuff wastewater,have been widely used.The reaction process and mechanism of the interaction between dye and surfantant have also been a lot of researchers of all ages.Much effort has been devoted to the development of interaction methods,UV-vis spectra and conductometry are wide-spread use because of it has good accessibility and reliability.In this paper,the interaction process between bromophenol blue and cationic,non-ionic surfactants was checked by UV-vis spectra and conductometry respectively.First,the spectral data from this reaction is used to proved that the existence of associated reaction.And second,the association thermodynamic models were established on the basis of the characteristics of association reaction between bromophenol blue and surfactants.The effect of temperature on the associated reaction was studied through thermodynamics,and the change of entropy,enthalpy and free energy of the reaction were calculated.Finally,after the experimental and derived data analysis,the general pattern of associated reaction between bromophenol blue and surfactants can be obtained.Meanwhile,a series of UV spectra of solutions were determined,solutions diluted to the same concentration bromophenol blue with different concentrations of CTAB or OP-10.It can be used to identify the whole variant trend of UV spectra with concentration.Through the above analysis,I believe that the association interaction between bromophenol blue and surfactents are influenced by micelles.By establishing the micellization model and measuring the values of electric conductivity of surfactant aqueous solutions with different CTAB or OP-10 concentration.the critical micelle concentration values are obtained,which are essentially the same as the range of concentrations regular change of absorbance,it shows that the formation of the micelles has an impact on the association interaction between bromophenol blue and surfactants.Finally,the interaction between bromophenol blue and CTAB in aqueous solutions of different alcohols,microemulsion have been studied.A practical experiment is designed based on thermodynamic model and microemulsion model,respectively.The study found that alcohols promoted the associated reaction,but microemulsion inhibit the associated reaction between bromophenol blue and CTAB.On solubilization of bromophenol blue by OP-10 has been studied,according to the model of distribution coefficient obtained the distribution coefficient of bromophenol blue in both aqueous phase and micellar phase through the fitting analysis.