Phase separation dynamics in the presence of surfactant molecules with an asymmetric shape

Toshihiro Kawakatsu, Kyozi Kawasaki, Michihiro Furusaka, Hirofumi Okabayashi, Toshiji Kanaya

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

We investigate the dynamics of phase separation processes in the presence of added surfactant molecules with an asymmetric shape, e.g., surfactant molecules with asymmetric hydrophilic/hydrophobic sizes, or block copolymers with asymmetric compositions of subchains. Upon adsorption onto interfaces, such asymmetric surfactant molecules produce a spontaneous curvature of interfaces. The analysis is based on the hybrid model, with which one can investigate the macroscopic phase separation phenomena while keeping some essential molecular features of the surfactant. Computer simulations are performed using the hybrid model and we found a spontaneous morphological change from a bicontinuous structure to a globular structure during the phase separation process. Such a morphological change is caused by the spontaneous curvature of the interfaces where the surfactant molecules are adsorbed. A simple argument to explain such a phenomenon is also presented.

Original languageEnglish
Pages (from-to)2247-2253
Number of pages7
JournalThe Journal of Chemical Physics
Volume102
Issue number5
DOIs
Publication statusPublished - 1995 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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