阴离子与非离子表面活性剂复配体系反胶团的电导研究

Studies on the Conductivity of Mixed Reverse Micelles of Anionic and Non-Ionic Surfactants

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.

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.