Kinetics of micellization of quaternary ammonium gemini surfactants
- 化学化工－已发表论文 
The stopped-flow technique combined with Aniannson-Wall theory was used to study the kinetics of micelle formation-breakup in aqueous solution of quaternary ammonium Gemini surfactant of the alkanediyl-alpha-omega-bis(dodecyldimethyl ammonium bromide) type with alkanediyl = (CH2)(2), (CH2)(3), (CH2)(4) and (CH2)(6). The kinetic results show that the relaxation time of micelle formation-breakup tau(2) is dependent on the spacer chain length, the concentration of the surfactants, the concentration of anti-ionic and the temperature. The quaternary ammonium Gemini surfactants show a decrease, in relaxation time of micelle formation-breakup, as the spacer chain length is increased. Above 293 K, the 1/tau(2) comes to a minimum value when the concentration of anti-ionic is increased. The effect of nucleus formation enthalpy provides evidence in support of our proposed mechanism of the micelle formation-breakup for quaternary ammonium Gemini surfactant with different spacer chain lengths.
CitationCHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE，2006,27（10）：1927-1931