Citation: LIU Jin-Yan, HAN Wai-Hui, ZHANG Yan, YAO Chao-Huai. Studies on the Conductivity ofMixed Reverse Micelles of Anionic and Non-Ionic Surfactants[J]. Acta Physico-Chimica Sinica, 2010, 26(06): 1552-1556. doi: 10.3866/PKU.WHXB20100536
阴离子与非离子表面活性剂复配体系反胶团的电导研究
在SDS/Tween60/正己醇/环己烷/水形成的反胶团复配体系中, 电导率(κ)与水和表面活性剂的摩尔比(W0)关系曲线上存在最大值, 随着复配体系中SDS的摩尔分数(xSDS)增大, 最大增溶水量(W0,max)向W0值更大的方向移动. xSDS≤0.5时, 随着xSDS的增大, W0,max所对应的电导率值增大; xSDS≥0.5时, 其电导率值减小. 在AOT/Tween60/环己烷/水体系中, 出现了与SDS/ Tween60/ 正己醇/正己烷/水体系类似的现象, 但W0,max所对应的电导率值, 随着xAOT的增大而增大, 不会出现极大值, 两者的差异主要是由于助表面活性剂醇的影响. 在SDS/TritionX-100/正己醇/环己烷/水体系中也印证了该结论.
English
Studies on the Conductivity ofMixed Reverse Micelles of Anionic and Non-Ionic Surfactants
In the SDS/Tween60/hexanol/cyclohexane/water system, a conductivity maximum was observed in the conductivity (κ) and molar ratio of water to surfactants (W0) curves for mixed reverse micelles. The W0,max moved to a bigger W0 value as the xSDS (molar fraction of anionic surfactant) value increased. At xSDS≤0.5, the conductivity values that correspond with W0,max increased as xSDS increased; and at xSDS≥0.5, the conductivity values decreased. In the AOT/Tween60/cyclohexane/water system, the observed phenomenon was similar to the SDS/Tween60/hexanol/cyclohexane/water system. However, conductivity values that correspond with W0,max increased with increasing xAOT and there was no maximum value. The difference is mainly due to cosurfactant effects, which was confirmed by the SDS/TritionX-100/hexanol/cyclohexane/water system.
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Key words:
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Conductivity
- / Mixed system
- / Reverse micelles
- / Solubilization
- / Non-ionic surfactant
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