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Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/1339

Title: Impurities in commercial phytantriol significantly alter its lyotropic liquid-crystalline phase behavior.
Authors: Dong, YD
Dong, AW
Larson, I
Rappolt, M
Amenitsch, H
Hanley, TL
Boyd, BJ
Keywords: Water
Glycerol
Phase Studies
Molecular Structure
Impurities
Liquid Crystals
Issue Date: 1-Jul-2008
Publisher: American Chemical Society
Citation: Dong, Y. D., Dong, A. W., Larson, I., Rappolt, M., Amenitsch, H., Hanley, T., et al. (2008). Impurities in commercial phytantriol significantly alter its lyotropic liquid-crystalline phase behavior. Langmuir, 24(13), 6998-7003.
Abstract: The lyotropic liquid-crystalline phase behavior of phytantriol is receiving increasing interest in the literature as a result of similarities with glyceryl monooleate, despite its very different molecular structure. Some differences in the phase-transition temperature for the bicontinuous cubic to reverse hexagonal phase have been reported in the literature. In this study, we have investigated the influence that the commercial source and hence the purity has on the lyotropic phase behavior of phytantriol. Suppression of the phase-transition temperatures (by up to 15 degrees C for the bicontinuous cubic to reverse hexagonal phase transition) is apparent with lower-purity phytantriol. In addition, the composition boundaries were also found to depend significantly on the source and purity of phytantriol, with the bicontinuous cubic phase + excess water boundary occurring at a water content above that reported previously (i.e., > 5% higher). Both the temperature and compositional changes in phase boundaries have significant implications on the use of these materials and highlight the impact that subtle levels of impurities can play in the phase behavior of these types of materials. © 2008, American Chemical Society
URI: http://dx.doi.org/10.1021/la8005579
http://apo.ansto.gov.au/dspace/handle/10238/1339
ISSN: 0743-7463
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