Percolation in oil‐continuous microemulsions. A dielectric study of aerosol OT/water/isooctane
Percolation in oil‐continuous microemulsions. A dielectric study of aerosol OT/water/isooctane
复制标题
气溶胶 OT/水/异辛烷的介电研究。
DOI：
10.1063/1.451588
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发表时间：
1986
影响因子：
4.4
通讯作者：
Y. K. Levine
中科院分区：
文献类型：
--
作者：
M. V. Dijk;G. Casteleijn;J. Joosten;Y. K. Levine
用介电谱研究了AOT/水/异辛烷微乳液的逾渗转变。在逾渗阈值处，体系的电导率急剧增加，静态介电常数达到极大值。结果表明，介电常数的频率依赖性可以很好地描述简单的逾渗理论的标度关系。频率依赖性的临界指数u=0.62±0.02，与温度和微乳液组成无关。逾渗临界体积分数的温度依赖性与远离逾渗阈值的系统的介电常数的温度依赖性有关。
The percolation transition in AOT/water/isooctane microemulsions has been studied by means of dielectric spectroscopy. At the percolation threshold the conductivity of the system increases sharply and the static dielectric permittivity attains a large maximum. It is shown that the frequency dependence of the permittivity can be well described by simple scaling relations of percolation theory. The critical exponent u of the frequency dependence has been found to be equal to u=0.62±0.02 and independent of temperature and microemulsion composition. The temperature dependence of the critical volume fraction for percolation has been related to the temperature dependence of the permittivity of the system far away from the percolation threshold.