Phase Behavior and Structural Transitions in Sodium Dodecyl Sulfonate Microemulsions

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Phase Behavior and Structural Transitions in Sodium Dodecyl Sulfonate Microemulsions

YANG Gensheng^a; SHI Jiehua^a; LI Jinghua^a; WANG Pu^a; YAO Shanjing^b

^a College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310032,
China
^b Department of Chemical and Biochemical Engineering, Zhejiang University, Hangzhou 310027,
China

Received:1900-01-01 Revised:1900-01-01 Online:2002-12-28 Published:2002-12-28
Contact: YANG Gensheng

十二烷基磺酸钠/异辛烷/正构醇/水微乳状液的相行为及其结构转变的研究

杨根生^a; 施介华^a; 李景华^a; 王普^a; 姚善泾^b

^a College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310032,
China
^b Department of Chemical and Biochemical Engineering, Zhejiang University, Hangzhou 310027,
China

通讯作者: 杨根生

Abstract

Abstract: The forming mechanism ofmicroemulsion 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 determined. 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
ofoil droplets in water (O/W) at high water content.

Key words: sodium dodecyl sulfonate, alcohol, microemulsion, phase behavior, conductivity

摘要： The forming mechanism ofmicroemulsion 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 determined. 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
ofoil droplets in water (O/W) at high water content.

关键词: sodium dodecyl sulfonate;alcohol;microemulsion;phase behavior;conductivity

YANG Gensheng, SHI Jiehua, LI Jinghua, WANG Pu, YAO Shanjing. Phase Behavior and Structural Transitions in Sodium Dodecyl Sulfonate Microemulsions[J]. .

杨根生, 施介华, 李景华, 王普, 姚善泾. 十二烷基磺酸钠/异辛烷/正构醇/水微乳状液的相行为及其结构转变的研究[J]. CIESC Journal.

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