Correlation of Viscoelastic Properties with Critical Packing Parameter for Mixed Surfactant Solutions in the L1Region
Correlation of Viscoelastic Properties with Critical Packing Parameter for Mixed Surfactant Solutions in the L1Region
复制标题
L1 区域混合表面活性剂溶液的粘弹性与临界填充参数的相关性
DOI：
10.1021/bk-1994-0578.ch010
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
W. Sun
中科院分区：
文献类型：
--
作者：
C. Herb;L. Chen;W. Sun
我们研究了含有十二烷基硫酸钠和n，n-双（2-羟乙基）十二酰胺的水溶液在相图的正常胶束（L1）区域的大部分的稳态剪切和动态流变性能。的解决方案被发现表现出典型的系统，是由细长的，棒状胶束的粘弹性行为。我们在相图上绘制了零剪切粘度η0和弛豫时间τR的直线，并表明L1相边界的形状与这些直线的位置和值之间存在着关系。几个其他的阴离子/非离子和阳离子/阴离子系统进行了比较，发现遵循相同的关系。我们还表明，我们的系统的常数τ R线遵循相同的路径，我们估计的恒定criticalpacking参数线，这表明能够预测这些表面活性剂溶液的流变性，从更基本的结构/性能的胶束考虑的可能性
We have investigated the steady shear and dynamic rheological properties of aqueous solutions containing sodium dodecylsulfate and n,n-bis(2-hydroxyethyl) dodecanamide over a large part of the normal micelle (L1) region of the phase diagram. The solutions are found to exhibit viscoelastic behavior typical of systems that are composed of elongated, rod-like micelles. We have mapped lines of constant zero-shear viscosity, η0, and relaxation time, τR, onto the phase diagram and show that there is a relationship between the shape of the L1phase boundary and the location and values of these lines. Several other anionic/nonionic and cationic/anionic systems are compared and found to follow the same relationship. We also show that lines of constant τRfor our system follow the same paths as our estimated lines of constantcriticalpacking parameter, suggesting the possibility of being able to predict the rheology of these surfactant solutions from more fundamental structure/property considerations for the micelles