VISCOELASTIC BEHAVIOR OF WATER AOT NORMAL-HEPTANE MICROEMULSIONS BY ULTRASONIC-ABSORPTION INVESTIGATION

被引：12

作者：

DAPRANO, A

DARRIGO, G

GOFFREDI, M

PAPARELLI, A

LIVERI, VT

机构：

[1] UNIV LA SAPIENZA,DIPARTIMENTO FIS,I-00185 ROME,ITALY

[2] UNIV PALERMO,DIPARTMENTO CHIM FIS,I-90123 PALERMO,ITALY

来源：

JOURNAL OF CHEMICAL PHYSICS | 1991年 / 95卷 / 02期

关键词：

D O I：

10.1063/1.461112

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The ultrasonic absorption in water/sodium bis(2-ethylhexyl) sulfosuccinate (AOT)/n-heptane system has been measured at 25-degrees-C, as a function of the water/AOT molar ratio (X) and of the volume fraction (phi) of the micellar phase. The ultrasonic spectra have been found strongly dependent on phi and nearly independent on X. In particular, as phi-increases, ultrasonic dynamics shifts from a single to a distribution of relaxation times with occurrence of viscoelastic effects. Such findings have been correlated to the increased connectivity of the micellar network.

引用

页码：1304 / 1309

页数：6

共 22 条

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