Phase behavior of polyoxyethylene dodecyl ether-water systems

Huang, Kuo-Lun; Shigeta, Kazuki; Kunieda, H.

doi:10.1007/bfb0118071

Cited by 53 publications

(32 citation statements)

References 10 publications

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“…This structure is expected to be built of discrete micellar aggregates packed in a cubic array. The features of this phase diagram are similar to those of other hydrophilic polyoxyethylene surfactants (11,17).…”

Section: Phase Diagram Of the C 12 Eo 25 /Water Systemmentioning

confidence: 55%

“…A solid-present region exists at high surfactant concentration. The cubic phase is considered a discontinuous cubic phase, denoted by I 1 , previously observed in polyoxyethylene derivatives with a long EO chain (10,11,(13)(14)(15)(16)(17)(18). This structure is expected to be built of discrete micellar aggregates packed in a cubic array.…”

Section: Phase Diagram Of the C 12 Eo 25 /Water Systemmentioning

confidence: 99%

“…When its EO units exceed 8-10, the surfactant forms the discontinuous cubic phase over a wide range of compositions in a binary water-nonionic surfactant system (10,11). Hence, it would be possible to form a stable concentrated emulsion in the hydrophilic surfactant systems.…”

Section: Introductionmentioning

confidence: 98%

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Cubic-Phase-Based Concentrated Emulsions

Rodríguez

Shigeta

Kunieda

2000

Journal of Colloid and Interface Science

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Section: Phase Diagram Of the C 12 Eo 25 /Water Systemmentioning

confidence: 55%

Section: Phase Diagram Of the C 12 Eo 25 /Water Systemmentioning

confidence: 99%

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Cubic-Phase-Based Concentrated Emulsions

Rodríguez

Shigeta

Kunieda

2000

Journal of Colloid and Interface Science

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“…In the same phase diagram of the water-C 12 EO n system (11,12), two isotropic¯uid phases, i.e. Wm and D 2 phases, appear.…”

Section: Introductionmentioning

confidence: 98%

“…In our previous papers, effect of added oil on the phase behavior in the water-C 12 EO n system as a function of its EO-chain length was investigated at constant temperature (11,12). The EO-chain length is a variable comparable to temperature in a ®xed surfactant system of a particular EO-chain length.…”

Section: Introductionmentioning

confidence: 99%

Oil-Induced Structural Change in Nonionic Microemulsions

Ozawa

Olsson

Kunieda

2001

Journal of Dispersion Science and Technology

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Effect of added oil (heptane or squalane) on the microemulsion structures in polyoxyethylene dodecyl ether (C 12 EO n ) systems was investigated by means of phase behavior and NMR diffusion experiments. In the binary water-C 12 EO n systems, an isotropic¯uid, D 2 (or L 3 ), and an aqueous micellar solution, Wm, 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 Wm phase is relatively large. These structural changes in microemulsions are discussed based on the self-diffusion coef®cients 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.

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