Soltero J F A, Alvarez-Ramírez J G, Fernández V V A, Tepale N, Bautista F, Macías E R, Pérez-López J H, Schulz P C, Manero O, Solans C, Puig J E
Departamento de Ingeniería Química, Universidad de Guadalajara, Boul. M. García Barragán #1451, Guadalajara, Jal. 44430, Mexico.
J Colloid Interface Sci. 2007 Aug 1;312(1):130-8. doi: 10.1016/j.jcis.2006.08.001.
The phase and rheological behaviors of the polymerizable surfactant, cetyltrimethylammonium benzoate (CTAVB), and water as a function of surfactant concentration and temperature are investigated here. The critical micelle concentration (cmc) and the (cmc(2)), as well as the Krafft temperature (T(K)), are reported. A large highly viscous micellar solution region and hexagonal- and lamellar-phase regions were identified. The micellar solutions exhibit shear thickening in the dilute regime, below the overlapping or entanglement concentration. At higher concentrations, wormlike micelles form and the solutions show strong viscoelasticity and Maxwell behavior in the linear regime and shear banding flow in the nonlinear regime. The linear viscoelastic regime is analyzed with the Granek-Cates model, showing that the relaxation is controlled by the kinetics of reformation and scission of the micelles. The steady and unsteady responses in the nonlinear regime are compared with the predictions of the Bautista-Manero-Puig (BMP) model. Model predictions follow the experimental data closely.
本文研究了可聚合表面活性剂苯甲酸十六烷基三甲基铵（CTAVB）与水的相行为和流变行为随表面活性剂浓度和温度的变化。报道了临界胶束浓度（cmc）和第二临界胶束浓度（cmc(2)）以及克拉夫特温度（T(K)）。确定了一个大的高粘性胶束溶液区域以及六方相和层状相区域。胶束溶液在低于重叠浓度或缠结浓度的稀溶液区域表现出剪切增稠现象。在较高浓度下，形成蠕虫状胶束，溶液在线性区域表现出强粘弹性和麦克斯韦行为，在非线性区域表现出剪切带化流动。用Granek-Cates模型分析了线性粘弹性区域，结果表明弛豫受胶束重新形成和断裂动力学的控制。将非线性区域的稳态和非稳态响应与Bautista-Manero-Puig（BMP）模型的预测结果进行了比较。模型预测与实验数据吻合得很好。
