粘度法研究邻-苯二甲酸氢钾/CTAB胶束体系的相互作用

Study on the Interaction of CTAB/Potassium Biphthalate Micellar System by Viscosity Method

研究了十六烷基三甲基溴化胺(CTAB)和邻-苯二甲酸氢钾在水溶液中的相互作用,考察了正丁醇对该胶束体系粘度的影响。结果表明,CTAB/邻-苯二甲酸氢钾胶束体系的相对粘度与邻-苯二甲酸氢钾和CTAB的物质的量之比(ξ)有密切的关系。当ξ由0逐渐增大时,体系的相对粘度也由1显著增大,ξ=2.0时粘度达到最大,以后又逐渐减低。正丁醇对该胶束体系粘度的影响,在盐浓度小于0.02mol/dm3时不明显,而在盐浓度大于0.02mol/dm3时体系粘度随正丁醇体积分数()的增加而迅速减少。

Rheological properties of the CTAB/potassium biphthalate system in aqueous solution have been studied. The results show that the relative viscosity of the solution changes with the molar ratio of potassium biphthalate/CTAB, ξ, distinctly in three regions. In the first region, CTAB cannot act with potassium biphthalate and the solution displays the lowest viscosity. In the second region, the relative viscosity rises dramatically and reaches a maximum at ξ=2.0, which is 28 times greater than that of the single component solution. In the third region, the relative viscosity of the solution decreases with ξ. The effect of n-butanol on the rheological properties of CTAB/potassium biphthalate in micelle systems has been investigated. The relative viscosity of the systems varies slowly when the concentration of potassium biphthalate is smaller than 0.02 mol/dm^(3)and decreases apparently when the concentration of potassium biphthalate is larger than 0.02 mol/dm^(3).