Zusammenfassung
The phase behavior of anionic microemulsions composed of water, sodium dodecyl sulfate (SDS), dodecane, and short propylene glycol monoalkyl ethers (CnPOm; n = 3, m = 1 and n = 4, m = 2, 3) is studied. From the pseudoternary phase diagrams, it is inferred that CnPOm compds. have cosurfactant behaviors comparable to those of 1-butanol and 1-pentanol, which are the most efficient and widely used ...
Zusammenfassung
The phase behavior of anionic microemulsions composed of water, sodium dodecyl sulfate (SDS), dodecane, and short propylene glycol monoalkyl ethers (CnPOm; n = 3, m = 1 and n = 4, m = 2, 3) is studied. From the pseudoternary phase diagrams, it is inferred that CnPOm compds. have cosurfactant behaviors comparable to those of 1-butanol and 1-pentanol, which are the most efficient and widely used cosurfactants. In contrast to these alcs., the CnPOm cosurfactants induce high temp. dependences in the SDS microemulsion systems. Furthermore, SDS/CnPOm microemulsions can be formed with small SDS concns. (SDS/C4PO3 mass ratio of 1/6.26). These have a low toxicity in contrast to systems contg. genotoxic short ethylene glycol ethers (CnEOm) as the cosurfactant. The strong temp. dependence can be favorable in the recovery of reaction products when the microemulsion is used either as a reaction medium or in extn. processes.
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