Phase Behavior and Dielectric Spectroscopy of the Sodiun Dodecyl Trioxyethylene Sulfate/n-Butanol/Water System

• 来源期刊: 中国化学（英文版）
• 年，卷（期）: 2003,（10）
• 页码范围: 1290-1296
• 页数: 7页
• 语种: 英文

摘要

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, bicontinuous (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/nbutanol = 3/7, DRS indicates a structure transition from W/Oto O/W micelles via B.C. Phase with the increase of water content. For the samples with a fixed weight ratio, SDES/H2O =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.