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Citation: Hao Jing-Cheng, Wang Han-Qing, Ge Jin-Huan. Studies on the Sturctures of Microemulsions[J]. Acta Physico-Chimica Sinica, ;1997, 13(07): 593-597. doi: 10.3866/PKU.WHXB19970704 shu

Studies on the Sturctures of Microemulsions

1.
Lanzhou Institute of Chemical Physics,Academia Sinica,Lanzhou 730000

Received Date: 28 October 1996
Available Online: 15 July 1997

The isothermal phase diagram for the system sodium dodecyle sulfonate/n-butanol/20% styrene/water has been determined at 40 ℃ The freeze fracture electron microscope, ESR, FT-IR have been used for determining the structures of microemulsions. The investigation shows that, with the increase of H2O-content the bicontinuous structural microemulsions determined by conductivity measurement under a change from W/O to bicontinuous (BC) and to O/W when the content of styrene is constant (20%). The stretching vibration and the bending vibration frequencies of OH in W/O microemulsions are less than those in O/W microemulsions, which indicates that the association strength of the hydrogen bonds in W/O microemulsions are much stronger than those in O/W microemulsions. The correlation times, τc, in O/W microemulsions, are longer than that in W/O microemulsions, indicating that the microviscosity in O/W microemulsion interface is higher than that in W/O microemulsion interface.
- Sodium dodecyle sulfonate,
- ESR,
- FT-IR,
- Freeze fracture electron microscope,
- Structures
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