TY - JOUR
T1 - Phase separation dynamics in the presence of surfactant molecules with an asymmetric shape
AU - Kawakatsu, Toshihiro
AU - Kawasaki, Kyozi
AU - Furusaka, Michihiro
AU - Okabayashi, Hirofumi
AU - Kanaya, Toshiji
PY - 1995
Y1 - 1995
N2 - 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.
AB - 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.
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U2 - 10.1063/1.468745
DO - 10.1063/1.468745
M3 - Article
AN - SCOPUS:0012436273
SN - 0021-9606
VL - 102
SP - 2247
EP - 2253
JO - Journal of Chemical Physics
JF - Journal of Chemical Physics
IS - 5
ER -