THE MICELLAR PROPERTIES OF 1-DODECYLPYRIDINIUM CHLORIDE AS STUDIED BY THE ION-SELECTIVE ELECTRODES

被引:28
作者
MAEDA, T
SATAKE, I
机构
关键词
SOLUTIONS - SURFACE ACTIVE AGENTS;
D O I
10.1246/bcsj.57.2396
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The surfactant ion and counterion activities of aqueous 1-dodecylpyridinium chloride with and without KCl were determined by using ion-selective electrodes. In the concentration range above the critical micelle concentration (cmc), the surfactant ion activity (a// plus ) was found to decrease gradually with increasing surfactant concentrations, while the reverse change was found for the counterion activity (a// minus ). As a result, the mean activity increased slightly but regularly with increasing concentrations. The concentration dependences of a// plus and a// minus became progressively smaller as the salt concentration increased. An application of the charged phase separation model led to an apparent degree of counterion association to the micelle ( beta ) of 0. 70 regardless of the salt concentration.
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页码:2396 / 2399
页数:4
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