TY - JOUR
T1 - Novel discrete micellar cubic phase from a mixture of GMO/ethanol/water
AU - Efrat, Rivka
AU - Aserin, Abraham
AU - Danino, Dganit
AU - Wachtel, Ellen J.
AU - Garti, Nissim
N1 - Funding Information:
This research was supported in part by the United States– Israel Binational Science Foundation grant number 2003260 (2005), and the Israel Science Foundation grant number 9059/03 (2003).
PY - 2005
Y1 - 2005
N2 - During the reconstruction the ternary phase diagram of glycerol monooleate (GMO)/ethanol/water, we detected a novel structure not previously seen. The new phase, denoted QL (micellar cubic liquid), is located within the 49-54 wt.-% water/41-33 wt.-% GMO binary mixture line and at 10-13 wt.-% EtOH in a small island within the phase diagram close to the cubic liquid-crystalline phase region. The QL phase is transparent (not tinted), of a low viscosity (36.6 Pa s), non-birefringent, and stable at room temperature. Evidence from severe centrifugation, synchrotron small-angle X-ray scattering (SAXS) measurements, and rheological behavior revealed that the sample is a single phase. SAXS reflections suggest that two types of domain may coexist. The symmetry of the QL phase is Pm3n. A cubic micellar structure is the dominant mesostructure of this unique sample. Cryo-TEM images show highly ordered domains with cubic symmetry, of lattice parameter 103 ± 2 Å. A possible transformation pathway to the QL phase is a 'rupture and refusion' mechanism, as the phase seems to have discontinuous symmetry.
AB - During the reconstruction the ternary phase diagram of glycerol monooleate (GMO)/ethanol/water, we detected a novel structure not previously seen. The new phase, denoted QL (micellar cubic liquid), is located within the 49-54 wt.-% water/41-33 wt.-% GMO binary mixture line and at 10-13 wt.-% EtOH in a small island within the phase diagram close to the cubic liquid-crystalline phase region. The QL phase is transparent (not tinted), of a low viscosity (36.6 Pa s), non-birefringent, and stable at room temperature. Evidence from severe centrifugation, synchrotron small-angle X-ray scattering (SAXS) measurements, and rheological behavior revealed that the sample is a single phase. SAXS reflections suggest that two types of domain may coexist. The symmetry of the QL phase is Pm3n. A cubic micellar structure is the dominant mesostructure of this unique sample. Cryo-TEM images show highly ordered domains with cubic symmetry, of lattice parameter 103 ± 2 Å. A possible transformation pathway to the QL phase is a 'rupture and refusion' mechanism, as the phase seems to have discontinuous symmetry.
UR - http://www.scopus.com/inward/record.url?scp=29144473527&partnerID=8YFLogxK
U2 - 10.1071/CH05171
DO - 10.1071/CH05171
M3 - 文章
AN - SCOPUS:29144473527
SN - 0004-9425
VL - 58
SP - 762
EP - 766
JO - Australian Journal of Chemistry
JF - Australian Journal of Chemistry
IS - 11
ER -