Phase Behavior and Structural Transitions in Sodium Dodecyl Sulfonate Microemulsions  

作　　者：杨根生 施介华 李景华 王普 姚善泾 

机构地区：[1]College of Pharmaceutical Sciences,Zhejiang University of Technology [2]Department of Chemical and Biochemical Engineering, Zhejiang University

出　　处：《Chinese Journal of Chemical Engineering》2002年第6期670-672,共3页中国化学工程学报（英文版）

基　　金：Supported by the Natural Science Foundation of Zhejiang Province (No. 299018).

摘　　要：The forming mechanism of microemulsion of sodium dodecyl sulfonate, alcohols,water and isooctane was studied, with particular emphasis on the effect of molecular weight andconcentration of alcohols. Phase diagram of the four components, alcohol, sodium dodecyl sulfonate,water and isooctane, was used as a means of study, through which the microemulsion regions weredetermined. Phase diagram of sodium dodecyl sulfonate/n-pentanol/isooctane/water system at κ_m = 2(κ_m = W_(n-pentanol)/W_(SDS)) is presented. The variation of conductivities of differentmicroemulsion samples with water was measured. From the conductivities we investigated a change instructure from water droplets in oil (W/O) at low water content to liquid crystal at intermediatewater content and a stricture of oil droplets in water (O/W) at high water content.The forming mechanism of microemulsion of sodium dodecyl sulfonate, alcohols, water and isooctane was studied, with particular emphasis on the effect of molecular weight and concentration of alcohols. Phase diagram of the four components, alcohol, sodium dodecyl sulfonate, water and isooctane, was used as a means of study, through which the microemulsion regions were deter-mined. Phase diagram of sodium dodecyl sulfonate/n-pentanol/isooctane/water system at km = 2 (km = Wn-pentanol / WSDS ) is presented. The variation of conductivities of different microemulsion samples with water was measured. From the conductivities we investigated a change in structure from water droplets in oil (W/O) at low water content to liquid crystal at intermediate water content and a struc-ture of oil droplets in water (O/W) at high water content.

关 键 词：sodium dodecyl sulfonate ALCOHOL MICROEMULSION phase behavior CONDUCTIVITY 

分 类 号：O642[理学—物理化学]