Journal
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
Volume 22, Issue 1, Pages 119-124Publisher
MARCEL DEKKER INC
DOI: 10.1081/DIS-100102687
Keywords
microemulsion; poly(oxyethylene)dodecyl ether; PGSE-NMR method; self-diffusion; HLB temperature
Categories
Ask authors/readers for more resources
Effect of added oil (heptane or squalane) on the microemulsion structures in polyoxyethylene dodecyl ether (C12EOn) systems was investigated by means of phase behavior and NMR diffusion experiments. In the binary water-C12EOn systems, an isotropic fluid, D-2 (or L-3), and an aqueous micellar solution, Win, phases are successively formed with increasing the EO-chain length. Upon addition of heptane, D-2 and Wm phases are merged and a microemulsion of large solubilization is produced at a low surfactant concentration. With squalane, the solubilization of oil in D-2 phase is very low or almost zero, whereas the oil solubilization in Win phase is relatively large. These structural changes in microemulsions are discussed based on the self-diffusion coefficients of water, oil, and surfactant measured by the PGSE-NMR method. The difference in the phase behavior may be attributed to the difference in the penetration tendency of oil in the surfactant palisade layer.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available