Supercritical fluid swelling of liquid crystal films.
The influence of liquid and supercritical carbon dioxide and liquid propane on the structural properties of both ionic and nonionic surfactant-based liquid crystal films is discussed in this paper. Swelling of the films, measured using in situ small-angle neutron scattering (SANS), was found to be dependent on the solubility of the propane/carbon dioxide in the micelles of the respective liquid crystals. Additionally, under certain pressure conditions the structural properties of some of the films were observed to change, ultimately leading to a loss of order in the micellar arrays of the liquid crystals.
O'Callaghan
John M
JM
Department of Chemistry, Material Section and Supercritical Fluid Centre, University College Cork, Cork, Ireland.
Copley
Mark P
MP
Hanrahan
John P
JP
Morris
Michael A
MA
Steytler
David C
DC
Heenan
Richard K
RK
Staudt
Reiner
R
Holmes
Justin D
JD
D002245:Carbon Dioxide; D050866:Liquid Crystals / Q000737:chemistry*; D053838:Scattering, Small Angle
D002245:Carbon Dioxide