Micellar growth due to interaggregate interactions

William M. Gelbart*, Avinoam Ben-Shaul, William E. McMullen, Andrew Masters

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

57 Scopus citations

Abstract

In a recent Letter we sketched a theory which takes into account the leading, second-virial corrections to ideal solution behavior in micellar suspensions. Allowing for excluded volume interactions between aggregates, we showed how the chemical potential of a soap molecule is modified by intermicellar packing entropy and how this can lead to enhancement of average size. In the present communication we generalize this idea to (arbitrarily) high concentrations and provide numerical estimates for the case of spherocylindrical rods. For overall soap concentrations more than two orders of magnitude above the cmc, the average aggregation number is shown to be significantly increased by intermicelle interactions of the excluded-volume type.

Original languageEnglish
Pages (from-to)861-866
Number of pages6
JournalJournal of Physical Chemistry
Volume88
Issue number5
DOIs
StatePublished - 1984

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