DILUTE PHASE-BEHAVIOR OF CETYL ALCOHOL, SODIUM LAURYL SULFATE, AND WATER

被引:25
作者
GOETZ, RJ [1 ]
ELAASSER, MS [1 ]
机构
[1] LEHIGH UNIV,CTR POLYMER SCI & ENGN,INST EMULS POLYMERS,DEPT CHEM ENGN,111 RES DR BLDG A,BETHLEHEM,PA 18015
关键词
Alcohols - Colloids - Micelles - Gels - Structure - Solutions - Phase Diagrams - Surface Active Agents - Solutions;
D O I
10.1021/la00091a020
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A ternary phase diagram of cetyl alcohol (CA), sodium lauryl sulfate (SLS), and water is constructed at room temperature in the dilute corner with a composition range of 96-100 wt % water, and 4-0 wt % of the surfactant and alcohol. Thephase behavior is examined though differential scanning calorimetry and associated with the polymorphism of CA. Three different phases are observed: (i) a gel phase, (ii) a coagel phase, and (iii) a micellar solution of SLS and crystals of CA. With aging, certain regions of the gel transform into the coagel phase. This transformation and the existence of the micelle + & crystal region are related to the collapse of the bilayer structure of the gel. © 1990, American Chemical Society. All rights reserved.
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页码:132 / 136
页数:5
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