The phase diagram of the ternary system of sodium dodecyl trioxyethylene sulfate (SDES)/ n butanol/water is obtained at (30 0±0 1) ℃. There exists a clear, isotropic, and low viscosity L phase, which coul...The phase diagram of the ternary system of sodium dodecyl trioxyethylene sulfate (SDES)/ n butanol/water is obtained at (30 0±0 1) ℃. There exists a clear, isotropic, and low viscosity L phase, which could be divided into W/O micelle, bi continuous (B.C.) phase and O/W micelle by conductivity measurements. Dielectric Relaxation Spectroscopy (DRS) measurements are applied to investigate microstructure changes of this system. For samples with a fixed weight ratio, SDES/ n butanol=3/7, DRS indicates a structure transition from W/O to O/W micelles via B.C. phase with the increase of water content. For the samples with a fixed weight ratio, SDES/H 2O=4/6, DRS can presents that there exist changes of onefold structure size of W/O micelles as n butanol content increases. The results obtained from DRS and their analyses are in good agreement with those from phase diagram and conductivity measurements.展开更多
The pseudotertiary phase diagram of the microemulsion system alkyl polyglucoside/n-butanol/n-hexane/water was plotted at （30.0±0.1） ℃. The dielectric measurements, including permittivity, conductivity, relaxat...The pseudotertiary phase diagram of the microemulsion system alkyl polyglucoside/n-butanol/n-hexane/water was plotted at （30.0±0.1） ℃. The dielectric measurements, including permittivity, conductivity, relaxation strength, characteristic relaxation time, etc,, were applied to investigate the microstructure of the system. Unique dielectric relaxations were observed over the frequency range of 5-10^7 Hz, taking place possibly through an interracial polarization mechanism. According to the results obtained from dielectric spectroscopy, the structures of the microemulsion O/W, BC and W/O were determined, and some dielectric and phase parameters were calculated.展开更多
文摘The phase diagram of the ternary system of sodium dodecyl trioxyethylene sulfate (SDES)/ n butanol/water is obtained at (30 0±0 1) ℃. There exists a clear, isotropic, and low viscosity L phase, which could be divided into W/O micelle, bi continuous (B.C.) phase and O/W micelle by conductivity measurements. Dielectric Relaxation Spectroscopy (DRS) measurements are applied to investigate microstructure changes of this system. For samples with a fixed weight ratio, SDES/ n butanol=3/7, DRS indicates a structure transition from W/O to O/W micelles via B.C. phase with the increase of water content. For the samples with a fixed weight ratio, SDES/H 2O=4/6, DRS can presents that there exist changes of onefold structure size of W/O micelles as n butanol content increases. The results obtained from DRS and their analyses are in good agreement with those from phase diagram and conductivity measurements.
基金Project supported by the Visiting Scholar Foundation of Key Laboratory in Chinese Universities, the National Natural Science Foundation of China （No. 20273010） and the Natural Science Foundation of Shandong Province （No. Y2003B01）.
文摘The pseudotertiary phase diagram of the microemulsion system alkyl polyglucoside/n-butanol/n-hexane/water was plotted at （30.0±0.1） ℃. The dielectric measurements, including permittivity, conductivity, relaxation strength, characteristic relaxation time, etc,, were applied to investigate the microstructure of the system. Unique dielectric relaxations were observed over the frequency range of 5-10^7 Hz, taking place possibly through an interracial polarization mechanism. According to the results obtained from dielectric spectroscopy, the structures of the microemulsion O/W, BC and W/O were determined, and some dielectric and phase parameters were calculated.
