苯甲醇对CTAB/KBr胶束体系流变性及CTAB分子1HNMR谱影响的研究

报道了苯甲醇对CTAB/KBr胶束体系粘度的影响,利用1HNMR法研究了苯甲醇在CTAB胶束中的增溶位置.结果表明,在KBr盐溶液中,随着苯甲醇的加入,0.01mol/LCTAB胶束体系的粘度增大至最大值.对CTAB分子的1HNMR分析表明,少量的苯甲醇增溶在棒状胶束的界面,促使胶束体积增大和相互缠结,体系的粘度随之增大;当苯甲醇浓度较高时,将增溶在胶束的栅栏层靠近极性头一侧,胶束发生棒-球转变和解缠,体系的粘度降低.

The Effect of Benzyl Alcohol on the Rheology and 1H NMR Spectra of CTAB of CTAB/KBr Micellar System

The influence of benzyl alcohol on the rheology and 1H NMR spectra of CTAB of CTAB/KBr micellar system has been investigated. The addition of benzyl alcohol induces the viscosity of 0.01 mol/L CTAB/KBr micellar system to go through a marked maximum. In terms of 1H NMR spectra of CTAB, it is argued that a little amount of alcohol solubilized in the interfacial region of CTAB/KBr micelles will promote these micelles to be longer and overlapping. This process makes the viscosity of the system rise. With increasing alcohol concentration continuously, it will be dissolved in the palisades of micelles and induces the rod like micelles to be transformed into small sphere ones and disentanglement. Then the viscosity of this micellar system decreases.