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《Acta Physico-Chimica Sinica》 2006-04
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Studies on the Conductivity of Reverse Microemulsion

PENG, Chun-Yu ZHOU, Hai-Hui ZENG, Wei JIAO, Shu-Qiang LUO, Sheng-Lian KUANG, Ya-Fei*(College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China)  
Surfactant p-octyl polyethylene glycol phenyl ether (Triton X-100) or cetyltrimethylammonium bromide (CTAB) was mixed with n-hexane, n-hexanol, and water for preparing reverse microemulsion. The effects of H+ concentration in water phase, concentrations of surfactant and cosurfactant on the microemulsion conductivity were studied. The results demonstrated that increasing H+ concentration in water phase enhanced the conductivity of reverse microemulsion greatly. The conductivity of microemulsion could be increased by 1~2 orders of magnitude as the H+ concentration increased from 1 mol·L-1 to 10 mol·L-1. When the H+ concentration of water phase was 10 mol·L-1, the conductivity of microemulsion enhanced as the water volume increased. The conductivity of these microemulsion increased to about 3200 μS·cm-1 when the volume ratio of water to oil was 3∶10. The conductivity of microemulsion was enhanced as the Triton X-100 concentration increased, while it decreased with the increase of the CTAB concentration. The conductivity of non-ionic microemulsion decreased with the increase of cosurfactant concentration, while the conductivity of ionic microemulsion showed a camel shape change with the cosurfactant concentration.
【Fund】: 湖南省科学技术项目(05JT1026)资助
【CateGory Index】: O648.2
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