Abstract
ABSTRACTThe UV-Vis light absorption spectroscopy of bromophenol blue (BPB) in a series of cetyltrimethylammonium bromide (CTAB) aqueous solutions and microemulsions has been determined. There exist association interactions between the BPB and cationic surfactant CTAB. By establishing the appropriate association models and measuring the absorbance in different concentrations of BPB aqueous solutions and microemulsions that have different R values, the association constants K were obtained and the values of thermodynamics functions of association ΔrGm were calculated. It shows that the formation of microemulsion has inhibitory effects on the association reaction.
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