Persistence length measurements in middle phase microemulsions

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Abstract
An X-ray study of middle phase microemulsions has been performed on a model system where the surfactant is an alkyl benzene sulfonate (SHBS). The characteristic dispersion sizes were found to be significantly larger than in an earlier work on a model system where the surfactant was an alkyl sulfate (SDS). The difference is discussed in terms of rigidity of surfactant layers and of alcohol partitioning between the layers and the oil and water domains. The conclusions support the picture in which the dispersion scale is identified with the persistence length of the surfactant

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