Pressure induced phase transitions of TTAB-micellar solutions studied by SANS and Raman spectroscopy.
Using small angle neutron scattering in combination with optical Raman spectroscopy, phase transitions in the micellar system tetradecyl-trimethylammonium bromide (TTAB) have been investigated in a wide range of temperatures, pressures and surfactant concentrations. Allowing for the sluggish kinetics of crystallisation, the phase diagram in the p-T-c space could be determined that is dominated by a pronounced two-phase region of coexisting liquid and solid phases at elevated pressures.
Institute of Physical Chemistry, University of Göttingen, D-37077, Göttingen, Germany.
C R
CR
Haramagatti
A
A
Islamov
H
H
Gibhardt
N
N
Gorski
A
A
Kuklin
G
G
Eckold
D055592:Biophysical Phenomena; D001703:Biophysics; D008744:Methylamines / Q000737:chemistry*; D008823:Micelles; D044367:Phase Transition; D012542:Scattering, Radiation; D012996:Solutions / Q000737:chemistry; D013059:Spectrum Analysis, Raman; D013314:Stress, Mechanical; D013501:Surface-Active Agents / Q000737:chemistry*; D013997:Time Factors; D050337:Trimethyl Ammonium Compounds
D008744:Methylamines; D008823:Micelles; D012996:Solutions; D013501:Surface-Active Agents; D050337:Trimethyl Ammonium Compounds; C009410:tetradecyltrimethylammonium