Translational diffusion and solution structure of microemulsions
Translational diffusion and solution structure of microemulsions
复制标题
微乳液的平移扩散和溶液结构
DOI：
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发表时间：
1980
期刊：
影响因子：
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通讯作者：
P. Nilsson
中科院分区：
文献类型：
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作者：
B. Lindman;N. Kamenka;Themelis Michel Kathopoulis;B. Brun;P. Nilsson
对于含有大量水和烃的表面活性剂体系中的同位素溶液相，测定了几种组分的自扩散系数，以获得溶液结构的信息。所研究的相是在非离子表面活性剂体系中的一个表面活性剂相和在离子表面活性剂+助表面活性剂体系中的一个微乳液相。选用的体系为四甘醇十二烷基醚-正十六烷-水和辛基苯磺酸钠-正戊醇癸烷-氯化钠-水。所使用的实验技术是使用放射性标记的开放式毛细管法和NMR（H/sub 1/和H/sub 2/ NMR）自旋回波脉冲场梯度法。在这两个系统中的烃和水（+对流）的扩散是快速的宏观距离表明，解决方案是烃和水连续的宽的组成范围内。结果未显示具有水包油和油包水微乳液的区域，其中两种类型的聚集体之间存在急剧过渡。
For isotopic solution phases in surfactant systems which contain large amounts of water and hydrocarbon, the self-diffusion coefficients were determined for several components to obtain information on solution structure. Phases studied were one surfactant phase in a nonionic surfactant system and one microemulsion phase in an ionic surfactant + cosurfacant system. The systems chosen were tetraethyleneglycol dodecyl ether-exadecane-water and sodium octylbenzenesulfonate-pentanol decane-sodium chloride-water. The experimental techniques used were the open-ended capillary tube method using radioactive labeling and the NMR (H/sub 1/ and H/sub 2/ NMR) spin-echo pulsed-field gradient method. Over wide composition ranges in both systems both hydrocarbon and water (+ counterion) diffusion is rapid over macroscopic distances demonstrating that the solutions are both hydrocarbon and water continuous. The results do not show areas with oil-in-water and water-in-oil microemulsions with a sharp transition between the 2 types of aggregates.