Microscopic Investigation
on Morphologies of Bilayer
Gel Structure in the Mixed Polyoxyethylene-Type Nonionic Surfactant
Systems
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Abstract
We investigated morphologies of lamellar domains below
the Krafft
temperature in the mixed polyoxyethylene-type nonionic surfactant,
a C<sub>16</sub>E<sub>6</sub>/C<sub>16</sub>E<sub>7</sub>/water system,
by using optical microscopy, confocal microscopy, small/wide-angle
X-ray scattering, and small-angle neutron scattering. We have found
that the morphology discontinuously changes from network structures
of lamellar domains to spherical vesicles with increasing mole fraction
of C<sub>16</sub>E<sub>7</sub>, via the coexistence region of vesicles
and network structures of lamellar domains
