The self-organized structure is changed from hexagonal to lamellar liquid c
rystals by mixing sucrose lipophilic multi-dodecanoate (L-595) with hydroph
ilic sucrose monododecanoate (L-1695) in water. Although no cubic phases ar
e found in water, a discontinuous cubic phase (I-1) with oil-swollen micell
es or a cubic-phase microemulsion is produced upon addition of squalane, n-
hexadecane, n-decane, n-octane and n-heptane at the weight ratio of L-1695/
L-595 = 1/1. The small-angle X-ray scattering spectrum and the phase behavi
or show that the micelles are packed in a face-centered cubic array in the
I-1 phase. The single cubic-phase region shifts to higher oil content with
the decrease in the molecular size of oil and finally, no cubic phases are
found with m-xylene and cyclohexane as oil. Furthermore, from the analysis
of compositions of the I-1 phases, it is suggested that the shape of the mi
celles becomes non-spherical in the short-chain alkane systems. (C) 2001 Pu
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